Vol2 Endangering Landslide by shilpa gupta

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Bajir bawadi

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Rockfall , Soil slope with erosion, and road subsidence [째] Above the road 60 Below the road

45째

[m]

100 m

[m] Above the road

100

Below the road Yes(Little)

75 Debris type(soil/ boulders)

Comprehensive CAT Plan of Satluj River Basin

Soil and small sized rocks

Volume: II Section: 1I Page No:

Approach to top portion of Slope Distance required at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes / No

Yes

[m]

Soil/ Rock/Rock with Soil cover

Rock with soil cover

[m]

<1.0 m Yes

Yes

Proposed Solution Problem The slope in this area is of rock above the road and below the road the slope is made of soil. The rock slope has been eroded at some stretches leading to rockfall. The soil slope is posing a problem of stability and surface erosion. Also some parts of the stretch has the problem of road sudsidence. The toe of the slope is subjected to erosion by the river at the bottom of the slope

To take account of the stability and erosion of the slopes below the road level, gabions walls and Bio Mat (erosion control mat) along with DT Mesh is proposed to be laid on the slope surface. A toe wall made of gabion can be constructed at the bottom of the slope to prevent any toe erosion or encroachment leading to the failure of the slope, which also helps in stabilizing the slope. For road subsidence, gabion walls are to be constructed below the road to improve the stability of the slope and Bio Mat is proposed to take care of erosion on the slope. U pins of 0.6 m length are used to adhere Bio Mat to the slope which are placed at spacing of 3 m c/c. Bio Mat acts as erosion control mats and which after covering with vegetative soil will aid the local shrubs to establish firm roots.

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Typical Cross-section:

Notes:

Gabion Wall for Mumbai-Pune Express way

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing:

Location: Bajir Bawadi Stretch: Rockfall, Soil slope with erosion and Road subsidence Solution: Simple drapery system using Steel Grid MO and Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 100.0m, length 200m; Total No. of Gabion walls : 3 No's S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, 1 Cum 6000 2700 16,200,000.00 tying and filling of Gabions with stones of required sizes and quality etc, with a thermally bonded geotextile at the rear of Gabions, etc complete. Dressing of the soil-boulder slope to 2 Sq.m 20000 250 5,000,000.00 obtain a levelled surface Cutting of soil slope to required level 3 Cum 6000 400 1,260,000.00 and inclination as per drawing Backfilling at select areas with the 4 excavated material to the required Cum 6000 250 1,500,000.00 level and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped 5 Sq.m 20000 850 17,000,000.00 Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting Sq.m 20000 of local shrubs etc Providing and laying of Simple Drapery System for protection of falling of loose boulder using SteelGrid-MO, Mesh type 10x 12, 7 reinforced with 8.0mm steel cable Sq.m 20000 1500 7,500,000.00 over the entire slope, including providing anchors at the top and bottom, use of required accessories, complete. Other miscellaneous civil works such as providing proper drains, toe 8 LS 9,692,000.00 collection system of loose rocks, access roads to the top etc. TOTAL 58,152,000.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details

Location

Browni

Stretch Details

Stretch-1

General Information Type of surface Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Weathered rock mass 85

[째] [m]

250

[m]

20-50

Debris type(soil/ boulders)

Soil mixed with Boulders

Road blocked by

Surface of rock Regular / Undulating / Bumpy / Overhanging

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Yes / No

Yes

[m]

Soil/ Rock/Rock with Soil cover

Rock with soil cover

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

< 1.0

Yes

Problem The principal problem in this stretch is of the rocks falling from the slope and blocking the road below. Since, the road is running closely to the foot of the slope, any unprecedented rockfall will lead to the closure of the road until the period of further clearance. On the slope, boulders mixed with soil are present and measures are to be taken to prevent the erosion of soil which finally leads to rockfall.

Proposed Solution To reduce the steepness of the slope, the soil portion at the top of the slope has to be removed and slope of 45째 to 60째 is to be made. Since large amount of the debris observed is of less than 0.5 -1 m in size, Steelgrid MO is proposed to be laid as simple drapery over the prepared slope. To prevent the debris from reaching on to the road, bottom anchoring may be done at frequent intervals for collecting debris and can be removed periodically.

Typical Cross-section:

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Site Details Location Stretch Details

Browni; At the Nalla; Problem of Debris Flow which flows in to the river Stretch-2

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total width of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Weathered rock mass with debris

Steelgrid MO application [Â°]

[m]

10 â&#x20AC;&#x201C; 15 m

[m]

Debris type(soil/ boulders)

Big Boulders

Flow of debris

Surface of rock

Regular / Undulating / Bumpy / Overhanging

Approach to top portion of Slope

Yes / No

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Distance Available at the top of slope (for Top anchoring)

[m]

Type of strata at Top of Cutting slope

Rock/soil/Rock with Soil cover

[m]

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes

Problem The problem in this particular stretch is of the small sized boulders/debris being carried from the upstream by the flowing water in the nalla and is deposited onto the road causing obstruction to the vehicles moving on the road.

Proposed Solution Debris flow barriers are proposed to be placed at three locations across the nalla. The debris flow barriers intercept the flowing rocks and prevent them from moving further down the nalla thus preventing the debris from blocking the road. The debris flow barrier on the upstream should be of higher energy than that of the barriers provided on the downstream of the nalla.

Typical Cross-section:

Debris Flow Barrier

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Debris Flow Barriers Site Details Location Stretch Details

Browni Stretch-3

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H)

Vegetation (if any)

Soil slope with heavy erosion [째] Above the road Below the road

60 45째

[m]

100 m

[m] Above the road

Below the road Yes(Shrubs and trees are present at some places of the stretch)

75 Debris type(soil/ boulders)

Comprehensive CAT Plan of Satluj River Basin

Soil and small sized rocks

Volume: II Section: 1I Page No:

Yes / No

Yes

[m]

Soil/ Rock/Rock with Soil cover

Soil

[m]

<1.0 m Yes

Yes

Proposed Solution Problem The stretches in this area are of steep soil slopes which pose the problem of slope instability and also subsidence of the road can be observed at some places. The slopes are also subjected to severe erosion finally leading to the failure of slopes. Further, the cuts made in the slopes for the formation of roads have lead to the instability of the slopes.

To take account of the excessive erosion of the steep slopes above the road level, Bio Mat (erosion control mat) along with DT Mesh is proposed to be laid on the slope surface. A toe wall made of gabion can be constructed at the bottom of the slope to prevent any toe erosion or encroachment leading to the failure of the slope, which also helps in stabilizing the slope. For the portion of slope below the road level and for road subsidence, series of gabion walls are to be constructed at intermediate places to improve the stability of the slope and Bio Mat is proposed to take care of erosion on the slope. U pins of 0.6 m length are used to adhere Bio Mat to the slope which are placed at spacing of 3 m c/c. Bio Mat acts as erosion control mats and which after covering with vegetative soil will aid the local shrubs to establish firm roots.

Notes:

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Gabion Wall for Mumbai-Pune Express way Typical Cross-section:

Costing:

Location: BROWNI Stretch: 1; Steep Slope with small sized boulders less than 0.5m nominal size with soil slope at the Top. Solution: Simple Drapery System at the Vertical Rock Face using Steel Grid MO system along with trimming of the top soil slope; Assumed Avg. Ht. 25.0m, length 200m S.No

2 3

Description Providing and laying of Simple Drapery System for protection of falling of loose boulder using SteelGrid-MO, Mesh type 10x 12, reinforced with 8.0mm steel cable over the entire slope, including providing anchors at the top and bottom, use of required accessories, complete. Loose rock scaling on the slope Trimming of the soil slope on the top to a safe angle

Unit

Qty

Rate

Amount (`)

Sq.m

5000

1500

7,500,000.00

Cum

1500

950

1,425,000.00

Cum

5000

250

1,250,000.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc. TOTAL

2,543,750.00 12,718,750.00

Location: Browni Stretch: 2; Large flow of Debris (Small to medium sized boulders debris flow with water on the Nalla) Solution: Passive system of Debris Flow protection using Flexible High Energy Debris Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 10.0m, No. of Barriers : 3 No's S.No Description Unit Qty Rate Amount (INR) Providing and laying of High Energy Debris Flow Barrier System , 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, 1 detachable base plates adequately LM 30 300000 9,000,000.00 galvanised, lateral bracing cables & upslope cables with ground anchors as per design and foundation anchors for posts and with all accessories complete. 2 Removing of Loose Boulders / Debris Cum 30 950 28,500.00 Other miscellaneous civil works such as 4 excavation, channelizing, access roads LS LS 2,257,125.00 to the top etc. TOTAL 11,285,625.00

Location: Browni Stretch: 3, Soil slope with heavy erosion Solution: Simple drapery system using Steel Grid MO and Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 105.0m, length 100m; Total No. of Gabion walls : 6 No's S.No

2 3

Description Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, with a thermally bonded geotextile at the rear of Gabions, etc complete. Dressing of the soil-boulder slope to obtain a levelled surface Cutting of soil slope to required level and inclination as per drawing Backfilling at select areas with the excavated material to the required level and inclination as per drawings

Unit

Qty

Rate

Cum

12000

2700

Sq.m

10500

250

Cum

3150

400

Cum

3150

250

Comprehensive CAT Plan of Satluj River Basin

Amount (`)

32,400,000.00

2,625,000.00 1,260,000.00

787,500.00

Volume: II Section: 1I Page No:

Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an additional Hexagonal shaped Double Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc Spreading of vegetative soil over the Erosion Control Blanket and planting of local shrubs etc Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Sq.m

10500

Sq.m

10500

850

TOTAL

8,925,000.00

9,199,500.00

55,197,000.00

GRANTD TOTAL:

Comprehensive CAT Plan of Satluj River Basin

79,201,375.00

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Dubling Bridge Soil Slope stability issues caused due to toe erosion at the bottom by the River and surficial erosion on the slopes

General Information: Soil slope not protected by vegetation; and Toe erosion.

Type of surface Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[째] [m] [m] No

60 200 50 Debris type(soil/ boulders)

Yes / No

Yes

[m]

<0.5

Soil/Rock/Rock with Soil cover

Soil

[m]

Yes

Comprehensive CAT Plan of Satluj River Basin

Soil with small rocks

Volume: II Section: 1I Page No:

Problem Proposed Solution The toe of the slope is being eroded by the flowing river and also the slope is made of soil which poses the problem of soil erosion. Also the flowing river is causing the problem of siltation on one side of the river at the meander.

A gabion toe wall of height 5 m is proposed along the bottom of the slope to control toe erosion along with gabion mattresses of 4 m length and 0.5 m thick to prevent the scouring at the bottom. Bio Mat is proposed to be laid on the slope to prevent soil erosion along with u-pins at 3m c/c spacing. Local vegetation needs to be planted on the top of Bio Mat to enhance the protection against surficial erosion. Also to control the erosion at the bottom of the slope, groynes of 8-10 m are to be provided at two locations which help in the process of siltation.

Typical Cross-section:

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing:

Location: Dubling Bridge Stretch: Soil slope not protected by vegetation and Toe erosion. Solution: Soil Slope protection with 5m High Gabion retaining wall to retain the road, Erosion control Mat, Bio Mat on the slope and 5m High toe Gabion wall at bottom along with Apron protection using 0.5m thk. And River training measures using Gabion Mattress along with some Groynes. Assumed Avg. Ht. 50.0m, length 200m; Total No. of Gabion walls : 2 No's S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 1 Cum 8000 2700 10x12 including lacing, tying and filling 21,600,000.00 of Gabions with stones of required sizes and quality etc for Gabion walls and Groynes, complete. Dressing of the soil-boulder slope to 2 Sq.m 10000 250 obtain a levelled surface 2,500,000.00 Cutting of soil slope to required level and 3 Cum 3000 400 inclination as per drawing 1,200,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 3000 250 750,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Sq.m 10000 850 8,500,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 10000 local shrubs etc Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of Mesh 3200 7 wire Dia. 2.7mm / 3.7mm and Mesh type Cum 1000 3,200,000.00 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for apron protection, complete. Other miscellaneous civil works such as providing proper drains, toe collection 8 LS LS system of loose rocks, access roads to 7,550,000.00 the top etc. TOTAL

45,300,000.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details

Gangarang Nalla

Location Stretch Details

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total width of the stretch (W) Total Sloping Height (H) Vegetation (if any)

Nallas with lot of debris flow [째]

[m]

5-10

[m]

NA Debris type(soil/ boulders)

Big Boulders

Flow of debris

Surface of rock Regular / Undulating / Bumpy / Overhanging

Yes / No

[m]

Soil/Rock/Rock Soil/Rock/ with Soil cover

[m]

NA Yes

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Whether Toe protection measures are to be provided

Yes

Proposed Solution Problem This stretch is a glacier prone nallas with large amount of debris flows along with heavy water flow.

Debris flow barriers are proposed to be placed at three locations across the nalla. The debris flow barriers intercept the flowing rocks and prevent them from moving further down the nalla thus preventing the debris from damaging the road downstream. The barrier provided on the upstream is of higher energy as compared to the barriers at other locations

Typical Cross-section section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Costing: Location: Gangarang Nalla Stretch: Nallas with lot of debris flow Solution: Passive system of Debris flow protection through the Nallahs using Flexible High Debris Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 10.0m, No. of Barriers : 3 No's S.No Description Unit Qty Rate Amount (INR) Providing and laying of High Energy Debris Flow Barrier System , 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, 1 detachable base plates adequately LM 30 300000 9,000,000.00 galvanised, lateral bracing cables & upslope cables with ground anchors as per design and foundation anchors for posts and with all accessories complete. 2

Removing of Loose Boulders Providing and laying of Spot rock bolting for a depth of 5-6m, 6m, with a 32mm dia continuous threaded bar including drilling and grouting Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

950

Nos

28800

TOTAL

28,500.00

921,600.00

2,487,525.00

12,437,625.00 Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Khadura Dhank

General Information: Information Type of surface

Soil slope with heavy erosion

Average inclination of soil slope w.r.t. Horizontal

[Â°]

60 â&#x20AC;&#x201C; 70 Degrees

[m]

1500 m

Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring)

[m]

100 m

Yes

Debris type(soil/ boulders)

Yes / No

----

[m]

Comprehensive hensive CAT Plan of Satluj River Basin

Soil with boulders

Volume: II Section: 1I Page No:

Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Soil/Rock/Rock with Soil cover

Soil

[m]

NA Yes

Yes

Problem The problem at this stretch can be divided as soil erosion on the slope and the toe erosion of the slope by the river water. Due to the erosion of the soil on the slope, boulders from the slope are falling into the river, obstructing the water flow. Also the toe erosion in a period of time may lead to the global failure of the slope

Proposed Solution A toe wall made from gabions is to be placed at the toe of the slope to o prevent the erosion at the bottom of the slope due to the river. The soil slope has to be cut and trimmed to make an slope of 45째 - 60째. Over the prepared slope, Bio Mat or Biomac can be laid to promote the vegetation on the surface which can be adhered to slope using 0.6 m length UU pins.

Typical Cross-section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing: Location: Khadura Dhank Stretch: Soil slope with heavy erosion Solution: Erosion control Mat, Bio Mat on the slope and 5m High toe Gabion wall at bottom along with Apron protection using 0.5m thk. Gabion Mattress Assumed Avg. Ht. 100.0m, length 1500m; S.No Description Unit Qty Rate Amount (`) ( Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and 1 Cum 30000 2700 Mesh type 10x12 including lacing, tying 81,000,000.00 and filling of Gabions with stones of required sizes and quality etc for Gabion walls ls and Groynes, complete. Dressing of the soil-boulder boulder slope to 2 Sq.m 150000 250 obtain a levelled surface 37,500,000.00 Cutting of soil slope to required level 3 Cum 45000 400 and inclination as per drawing 18,000,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 45000 250 11,250,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an Sq.m 150000 850 5 additional Hexagonal shaped Double 127,500,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 150000 local shrubs etc Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m 7 length and of Mesh wire Dia. 2.7mm / Cum 3750 2500 9,375,000.00 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required equired sizes and quality etc for apron protection, complete. Other miscellaneous civil works such as providing proper drains, toe collection 8 LS system of loose rocks, access roads to 56,925,000.00 the top etc. TOTAL

341,550,000.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Kaneri

General Information: Landslide

Type of problem Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

60째 [m] [m] Yes

300 m 30 Debris type(soil/ boulders)

Comprehensive CAT Plan of Satluj River Basin

-----

Volume: II Section: 1I Page No:

Approach to top portion of Slope

Yes / No

Yes

Distance required at the top of slope (for Top anchoring)

[m]

Type of strata at Top of Cutting slope

Soil/ Rock/Rock with Soil cover

[m]

<1.0 m

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes

Proposed Solution

Problem The slope in this area is has failed causing lanslides and change in the level of the roads.

To take account of the stability of the stability of the slope and the landslide, gabion walls as supposed to be placed at suitable locations on the slope.

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Typical Cross-section:

Notes:

Gabion Wall for Mumbai-Pune Express way

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing:

Location: Kaneri Stretch: Landslide and slope stability Solution: 5m High toe Gabion walls above the Road level ; Assumed Avg. Ht. 30.0m, length 300m; Total No. of Gabion walls : 2 No's S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, 1 Cum 12000 2700 tying and filling of Gabions with 32,400,000.00 stones of required sizes and quality etc, with a thermally bonded geotextile at the rear of Gabions, etc complete. Dressing of the soil-boulder slope to 2 Sq.m 9000 250 obtain a levelled surface 2,250,000.00 Cutting of soil slope to required level 3 Cum 2700 400 and inclination as per drawing 1,260,000.00 Backfilling at select areas with the 4 excavated material to the required Cum 2700 250 675,000.00 level and inclination as per drawings Other miscellaneous civil works such as providing proper drains, toe 5 LS collection system of loose rocks, 7,317,000.00 access roads to the top etc. TOTAL

43,902,000.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Section 2: Introduction Site Details

Location Stretch Details

Khoragla Nalla

General Information: Information Type of surface Average inclination of rock slope w.r.t. Horizontal Total width of the stretch (W) Total Sloping Height (H) Vegetation (if any)

Nallas with debris flow [째]

[m]

15-20

[m]

Debris type(soil/ boulders)

Big Boulders

Debris Flow

Surface of rock Regular / Undulating / Bumpy / Overhanging

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Yes / No

[m]

Rock with Soil cover

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

NA Yes

Yes

Problem This stretch is the glacier prone nallas with large amount of debris flows along with heavy water flow.

Proposed Solution Series of three high energy debris flow barriers made of ring nets are to be constructed at the upstream side of the nalla to prevent the huge rock masses from moving down the nalla.

Typical Cross-section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Notes:

Costing: Location: Khoragla Nalla Stretch: Nallas with lot of debris flow Solution: Passive system of Debris Flow protection using Flexible High Energy Debris Flow Barriers at various intervals ; Assumed Avg. width of Stretch: 20.0m, No. of Barriers : 3 No's S.No Description Unit Qty Rate Amount (INR) Providing and laying of High Energy Debris Flow Barrier System , 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, 1 detachable base plates adequately LM 30 300000 9,000,000.00 galvanised, lateral bracing cables & upslope cables with ground anchors as per design and foundation anchors for posts and with all accessories acc complete. 2

Removing of Loose Boulders Providing and laying of Spot rock bolting for a depth of 5-6m, 5 with a 32mm dia continuous threaded bar including drilling and grouting Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

950

Nos

28800

TOTAL

28,500.00

921,600.00

2,487,525.00

12,437,625.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Section 2: Introduction Site Details Location Stretch Details

Kuppa valley

General Information Type of surface

Soil slope with heavy erosion

Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H)

[째] Above the road

Vegetation (if any)

Yes

Debris type(soil/ boulders)

Yes / No

Yes

[m]

Soil/ Rock/Rock Rock with Soil cover

Soil

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Below the road [m] [m]

60-70 50-60째 500 200

Comprehensive hensive CAT Plan of Satluj River Basin

Soil

Volume: II Section: II Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

<0.5 m Yes

Yes

Problem The main problem at this stretch is of the loose soil mixed with boulders. The steep slopes pose the problem of heavy erosion and slope instability. Baspa river flowing at the base of the slope is causing the problem of erosion of soil at the bottom leading leadi to toe erosion. Since the slope is made of soil, the surface also has the problem of continuous soil erosion.

Proposed Solution The slope has to be trimmed and made to an angle of 45--60째 and is to be covered with Biomac or Bio Mat and DT Mesh adhered to the slope with U-pins. U Gabions walls of heifght 5 m are placed at intermediate locations on the slope below the road. A toe wall made of gabion is placed at the bottom of the slope to prevent toe erosion and 0.5 m thick gabion mattress is also placed at the bottom to take prevent scouring. Erosion control Mats to be covered with vegetative soil and planted with local shrubs.

Typical Cross-section: Cross

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: II Page No:

Costing: Location: Kuppa Valley Stretch: Soil slope with heavy surficial erosion, toe erosion from River Solution: Soil Stabilization using Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall bove the Road level & Series of Gabion walls of height 5m Each for Toe protection and Slope retension ; Assumed Avg. Ht. 200.0m, length 500m; Total No. of Gabion walls : 6 No's S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and 1 Cum 40000 2700 108,000,000.00 Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete. Dressing of the soil-boulder soil slope to Sq.m 100000 250 2 obtain a levelled surface 25,000,000.00 Cutting of soil slope to required level 3 Cum 30000 400 and inclination as per drawing 12,000,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 30000 250 7,500,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Sq.m 100000 850 85,000,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 100000 local shrubs etc 7 8

Loose rock scaling on the slope Trimming of the soil slope on the top to a safe angle Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

2500

950

Sq.m

500

250

TOTAL

2,375,000.00 125,000.00

48,000,000.00

288,000,000.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Lal Dhank

General Information Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Surface of rock

Fragmented Rocks on the slope with soil cover subjected to erosion [째]

[m]

500

[m]

500

Yes

Debris type(soil/ boulders)

Huge Boulders

Regular / Undulating / Bumpy / Overhanging

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Approach to top portion of Slope Distance Required the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure/ road Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes / No

---

[m]

Soil/Rock/Rock with Soil cover

Rock with soil cover

[m]

---Yes

Yes

Problem The rocks on the slope are fragmented with joints and fissures. There is loose soil cover on the top which also causes the removal of small sized rocks.

Proposed Solution HEA panels of 400 x 400/10 mm and double twisted mesh 10x12/3 with cortical strengthening are proposed on the surface after the removal of loosely held rock masses.

Typical Cross-section section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Costing: Location: Lal Dhank Stretch: Fragmented Rocks on the slope with soil cover Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system iand cortical strengthening over the slope; Assumed Avg. Ht. 100.0m, length 500m S.No Description Unit Qty Rate Amount (`) ( Providing and laying of Simple Drapery System for protection of falling of loose boulder using HEA Panel, size 400 x 400mm, 10.0mm steel cable with a Mechnanically woven Double Twisted 1 Zn. + PVC Coated Wire Mesh, Sq.m 50000 4000 200,000,000.00 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories like top support etc, complete. 2 3

Loose rock scaling on the slope Trimming/removal of any existing soil slope on the top to a safe angle Supply and fixing of Steel Anchor bolts of 25mm dia. and depth of 3m with washer plates of size 150mm x150mm x 6mm in rock for cortical strengthening at 3m c/c including drilling of holes, inserting cement capsules inside the holes, other accessories etc.with ith all contractors materials, scaffolding, tools & plants, all lead & lift, contractors manpower etc, as complete and as shown in drawings. Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

10000

950

Sq.m

10000

250

No's

1111

7500

TOTAL

9,500,000.00 2,500,000.00

8,332,500.00

44,066,500.00

264,399,000.00 Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Lippa Valley Below the road level

General Information: Information Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring)

Soil slope subjected to erosion [째]

[m]

200

[m]

Yes

Debris type(soil/ boulders)

Yes / No

Yes

[m]

Comprehensive hensive CAT Plan of Satluj River Basin

Soil and small sized rocks

Volume: II Section: 1I Page No:

Soil/Rock/Rock Rock with Soil cover

[m]

NA Yes

Yes

Proposed Solution Problem The main problem is of the slope material at the bottom being carried away by the flowing water in the river. The slope is made of soil which also causes erosion over the surface of the slope.

Over the slope, Bio Mat can be provided to prevent the erosion of the slope. 3 m high gabion wall and 0.5 m thick gabion mattress can be constructed along the bottom of the slope to protect the base of the slope from the erosion effect of the river water.

Typical Cross-section:

Notes:

8 m high Gabion wall on bank of river Godavari, Nasik Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Lippa Valley Above the road

General Information Type of surface Average erage inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Soil Slope with huge boulders 80

[째] [m]

200

[m]

Yes

Debris type(soil/ boulders)

Boulders and soil

Surface of rock Regular / Undulating / Bumpy / Overhanging

Approach to top portion of Slope Distance Required at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Yes / No

Yes

[m]

Soil/ Rock/Rock with Soil cover

Rock with soil cover

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

< 1.0

Yes

Proposed Solution Problem Loosely held huge rock boulders on the slope are to be prevented from falling down the slope.

Scaling should be done to remove the loose boulders on the surface of the slope. After scaling, HEA panels 400x 400/10 along with double twisted mesh 10x12 is draped over the slope with top and bottom anchoring.

Typical Cross-section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

HEA + DT over the slope Costing: Location: Lippa Valley Stretch: 1, Soil slope subjected to erosion Solution: Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 8.0m, length 200m; Total No. of Gabion walls : 1 No S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire 1 Dia. 2.7mm / 3.7mm and Mesh type Cum 4000 2700 10,800,000.00 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete. Dressing of the soil-boulder soil slope to 2 Sq.m 1600 250 obtain a levelled surface 400,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 480 400 192,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Cum 1600 850 1,360,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 1600 local shrubs etc Other miscellaneous civil works such as providing proper drains, toe collection 10 LS LS system of loose rocks, access roads to 2,550,400.00 the top etc. TOTAL

15,302,400.00 Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Location: Lippa Valley Stretch: 2; Steep Slope with Moderately jointed rock slope with boulders of big size > 0.5m and < 1.0m. Solution: Simple Drapery System at the Vertical Rock Face using HEA Panel + DT Netting system ; Assumed Avg. Ht. 50.0m, length 200m S.No Description Unit Qty Rate Amount (`) ( Providing and laying of Simple Drapery System for protection of falling of loose boulder using HEA Panel, size 400 x 400mm, 10.0mm steel cable with a Mechnanically woven Double Twisted 1 Sq.m 10000 4000 Zn. + PVC Coated Wire Mesh, 40,000,000.00 2.70/3.70mm dia. over the entire slope, including providing anchors at the top and bottom, use of required accessories like top support etc, tc, complete. 2 3

Loose rock scaling on the slope Trimming/removal of any existing soil slope on the top to a safe angle Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

2000

950

Sq.m

2000

250

TOTAL

1,900,000.00 500,000.00

8,480,000.00

50,880,000.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Namgia

General Information Slope with several outcrops rock of heavy weathered rock

Type of surface Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L)

[째] [m]

Total Sloping Height (H)

[m]

150

Vegetation (if any)

Debris type(soil/ boulders)

Boulders

Surface of rock Regular / Undulating / Bumpy / Overhanging Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring)

Yes / No

Yes

[m]

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Soil/ Rock/Rock with Soil cover

Rock

[m]

< 1.0

Yes

Proposed Solution Problem The rocks from the slopes are rolling down the slope and falling onto the infrastructure at the base of the slope.

A series of weirs with gabions can be constructed on the slope to retain the rocks from moving down the slope and also vegetation can be also promoted on the gabions.

Typical Cross-section

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Costing: Location: Namgia Stretch: Large slope stabilization with a water Channel Solution: Series of Gabion weirs each of height 5m; Assumed Avg. Ht. 150.0m, length 200m; Total No. of Gabion walls : 5 No's S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire 1 Dia. 2.7mm / 3.7mm and Mesh type Cum 20000 2700 54,000,000.00 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete. Dressing of the soil-boulder soil slope to 2 Sq.m 30000 250 obtain a levelled surface 7,500,000.00 Cutting of soil slope to required level Cum 9000 3 400 and inclination as per drawing 3,600,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 9000 250 2,250,000.00 and inclination as per drawings Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 30000 local shrubs etc Other miscellaneous civil works such as providing proper drains, toe collection 10 LS system of loose rocks, access roads to 13,470,000.00 the top etc. TOTAL

80,820,000.00 Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Powari Pangi Nalla Above the road level

General Information Slope with several outcrops rock of heavy weathered rock

Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

[째]

[m]

2000

[m]

150 - 200

Yes

Debris type(soil/ boulders)

Huge Boulders

Surface of rock Regular / Undulating / Bumpy / Overhanging

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Yes / No

Yes

[m]

---

Soil/Rock/Rock Rock with Rock Soil cover Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Distance between slope bottom and infrastructure/ road Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

<0.5 m Yes

Yes

Proposed Solution Problem The problem is of the large boulders rolling down the slopes from high heights causing damage and blockage of roads. roads

A toe wall made from gabions is to be placed at the toe of the slope to prevent the erosion at the bottom of the slope due to the river. The soil slope has to be cut and trimmed to make an slope of 60째. Over the prepared slope, Bio Mat can be laid to promote te the vegetation on the surface which can be adhered to slope using 0.6 m length U-pins. U

Typical Cross-section section:

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing:

Location: Powari Pangi Stretch: Slope with several outcrops rock of heavy weathered rock Solution: Erosion control Mat, Bio Mat on the slope and 5m High toe Gabion wall at bottom along with Apron protection using 0.5m thk. Gabion Mattress Assumed Avg. Ht. 175.0m, length 2000m; S.No Description Unit Qty Rate Amount (INR) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Cum 40000 1 2700 Mesh type 10x12 including lacing, 108,000,000.00 tying and filling of Gabions with stones of required sizes and quality etc for Gabion walls and Groynes, complete. Dressing of the soil-boulder soil slope to 2 Sq.m 350000 250 obtain a levelled surface 87,500,000.00 Cutting of soil slope to required level 3 Cum 105000 400 and inclination as per drawing 42,000,000.00 Backfilling at select areas with the 4 excavated material to the required Cum 105000 250 26,250,000.00 level and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Sq.m 350000 850 297,500,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia.. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 350000 local shrubs etc Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m 7 length and of Mesh wire Dia. 2.7mm / Cum 5000 2500 12,500,000.00 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc for apron protection, complete. Other miscellaneous civil works such as providing proper drains, toe 8 LS collection system of loose rocks, access 114,750,000.00 roads to the top etc. TOTAL

688,500,000.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Powari Pangi Nalla Below the road level

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Soil slope with boulders subjected to erosion [째]

[m]

2000

[m]

15-20

Debris type(soil/ boulders)

Yes / No

[m]

Soil/Rock/Rock Rock with NA Soil cover Comprehensive hensive CAT Plan of Satluj River Basin

Soil and small sized rocks

Volume: II Section: 1I Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m] Yes

Yes

Problem The portion of the slope below the road level is facing the problem of toe erosion by the high velocity waters of river Sutlej. The velocity of the flowing water is around 4 m/s. Also the face of the slope is also being subjected to erosion due to presence of lot of loose soil.

Proposed Solution Over the slope to take care of erosion, Bio Mat is to be laid after the scaling of the loose boulders and to avoid the erosion of the slope toe due to river water gabion wall can be constructed and gabion mattress can be laid at the toe of slope to prevent scouring action. The height of the gabion wall from the river bed should be more than the HFL of the flowing river.

Typical Cross-section section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

8 m highGabion wall on bank of river Godavari, Nasik

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing: Location: Powari Pangi Stretch: 1, Soil slope with boulders subjected to erosion Solution: Erosion control Mat, Bio Mat on the failed slope and 5m High toe Gabion wall at bottom including 0.5 m thk Gabion mattress as apron protection; Assumed Avg. Ht. 20.0m, length 2000m; Total No. of Gabion walls : 1 No S.No Description Unit Qty Rate Amount (`) Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire 1 Dia. 2.7mm / 3.7mm and Mesh type Cum 40000 2700 108,000,000.00 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, complete. Dressing of the soil-boulder soil slope to 2 Sq.m 40000 250 obtain a levelled surface 10,000,000.00 Backfilling at select areas with the Cum 12000 400 4 excavated material to the required level 4,800,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Cum 40000 850 34,000,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 40000 local shrubs etc Other miscellaneous civil works such as providing proper drains, toe collection 7 LS LS system of loose rocks, access roads to 31,360,000.00 the top etc. TOTAL

188,160,000.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Rispa

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure

Soil slope with boulders and heavy erosion 70

[째]

[m]

500 m

[m] Yes

40 m Soil with boulders

Debris type(soil/ boulders)

Yes / No

Yes

[m]

>3m

Soil/Rock/Rock with Soil cover [m] Comprehensive hensive CAT Plan of Satluj River Basin

Soil NA

Volume: II Section: 1I Page No:

Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes

Problem The major problem is of the instability of the slopes and erosion of the soil on the slopes. The slopes have failed making the slope nearly vertical. Also at the toe of the slope, a river is flowing which erodes the toe adding to the instability of the slopes.

Proposed Solution Series of gabions of 4 m are proposed to be constructed on the slope with Bio Mat laid on the surface. At the bottom b of the slope gabion wall is to be constructed along with gabion mattresses to avoid toe erosion and scouring. Also, groynes are to be constructed along the flow of river to prevent erosion and increase siltation on the banks.

Typical Cross-section section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing: Location: Rispa Stretch: Soil slope with boulders and heavy erosion Solution: Erosion control Mat, Bio Mat on the slope and Series of Gabion walls of height 5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 40.0m, length 500m; Total No. of Gabion walls : 3 No's S.No Description Unit Qty Rate Amount (`) ( Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 1 Cum 30000 2700 10x12 including lacing, tying and filling 81,000,000.00 of Gabions with stones of required sizes and quality etc, for Gabion walls & groynes complete. Dressing of the soil-boulder boulder slope to 2 Sq.m 20000 250 obtain a levelled surface 5,000,000.00 Cutting of soil slope to required level 3 Cum 6000 400 and inclination as per drawing 2,400,000.00 Backfilling at select areas with the 4 excavated material to the required level Cum 6000 250 1,500,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an Sq.m 20000 850 5 additional Hexagonal shaped Double 17,000,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m 20000 local shrubs etc Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of 7 Mesh wire Dia. 2.7mm / 3.7mm and Cum 1250 3200 4,000,000.00 Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required equired sizes and quality etc for apron protection, complete. Other miscellaneous civil works such as providing proper drains, toe collection 8 LS system of loose rocks, access roads to 22,180,000.00 the top etc. TOTAL

133,080,000.00 Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Spillow

General Information: Information Soil slope not protected by vegetation; and Toe erosion.

Type of surface Average inclination of rock slope w.r.t. Horizontal Total length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure

[째]

[m]

500

[m]

Debris type(soil/ boulders)

Yes / No

Yes

[m]

<0.5

Soil/Rock/Rock with Soil cover

Soil

[m]

Comprehensive hensive CAT Plan of Satluj River Basin

Soil with small rocks

Volume: II Section: 1I Page No:

Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

Yes

Problem The toe of the slope is being eroded by the flowing river and also the slope is made of soil which poses the problem of soil erosion. erosion Also the flowing river is causing the problem of siltation on one side of the river at the meander.

Proposed posed Solution Series of gabions are constructed along the sloe at intervals of 10 -15m.. A gabion toe wall of height 5 m is proposed along the bottom of the slope to control toe erosion and Bio Mat along with U-Pins U can be laid on the slope to prevent soil erosion.

Typical Cross-section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Costing: Location: Spillow Stretch: Soil slope not protected by vegetation; and Toe erosion Solution: Erosion control Mat, Bio Mat on the slope and Series of Gabion walls of height 5m Each for Toe protection and Slope retension including 0.5m thk Gabion mattress for apron protection; Assumed Avg. Ht. 30.0m, length 500m; Total No. of Gabion walls : 2 No's S.No Description Unit Qty Rate Amount (`) ( Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 1 Cum 20000 2700 10x12 including lacing, tying and filling 54,000,000.00 of Gabions with stones of required sizes and quality etc, for Gabion walls complete. boulder slope to Dressing of the soil-boulder 2 Sq.m 50000 250 obtain a levelled surface 12,500,000.00 Cutting of soil slope to required level 3 Cum 15000 400 and inclination as per drawing 6,000,000.00 Backfilling at select areas with the Cum 15000 250 4 excavated material to the required level 3,750,000.00 and inclination as per drawings Providing and laying of Bio Mat Turf Reinforcement Mat made of an open three dimensional synthetic mat made of Polypropylene filaments with an 5 additional Hexagonal shaped Double Sq.m 50000 850 42,500,000.00 Twisted Wire Mesh of Mesh Type 10 x 12, Zn + PVC Coated 2.70/3.70 mm wire dia. including providing U Pins at every 3-4m 4m c/c, neccessary laps etc Spreading of vegetative soil over the 6 Erosion Control Blanket and planting of Sq.m Sq.m local shrubs etc Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabion mattress of 0.5m thickness and 5m length and of 7 Mesh wire Dia. 2.7mm / 3.7mm and Cum 1250 3200 4,000,000.00 Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required equired sizes and quality etc for apron protection, complete. Other miscellaneous civil works such as providing proper drains, toe collection 8 LS system of loose rocks, access roads to 24,550,000.00 the top etc. TOTAL

147,300,000.00

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Tikru slip

General Information: Information Slope with several outcrops rock of heavy weathered rock

Type of surface Average inclination of rock slope w.r.t. Horizontal Total Length of the stretch (L) Total Sloping Height (H) Vegetation (if any)

[째]

[m]

200

[m]

250 Debris type(soil/ boulders)

Yes

Boulders

Regular / Undulating / Bumpy / Overhanging

Surface of rock Approach to top portion of Slope

Yes / No

Yes

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

Soil/Rock/Rock with Soil cover

Rock with soil cover

[m]

Yes

Proposed Solution

Problem The slope in this stretch contains large amount of boulders which are loosely held to the surface. The bottom of the slope has the problem of toe erosion by high water flows.

Rock fall barrier is proposed at the higher position of slope to reduce the energy of the falling rocks and a rockfall barrier is proposed at intermediate position on the slope .A gabion wall of height 5 m is to be constructed at the bottom of the slope to prevent toe erosion and also to catch the falling boulders thus prevent preventing them from falling into the river. A gabion mattress is also to be constructed at the toe to prevent scouring due to river water.

Typical Cross-section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes: Also a catch pit behind the Gabion Walls can be constructed to collect the rocks which can be removed periodically

Costing: Location: Tikru Slip Stretch: Slope with several outcrops rock of heavy weathered rock Solution: Passive system of Rock fall protection using Flexible High Energy Rockfall Barriers at various intervals and Gabion wall at toe to catch the boulder in the trench. Avg. Height of stretch: 150m; Assumed Avg. length of Stretch: 200.0m, No. of Barriers Barr : 2 No's S.No Description Unit Qty Rate Amount (INR) Providing and laying of High Energy Rock fall Barrier System having a capacity of 3000 KiloJoules, KiloJoules 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, 1 detachable base plates adequately 300000 LM 400 120,000,000.00 galvanised, lateral bracing cables & upslope cables in accordance with ETAG 027 with ground anchors as per design and foundation anchors anchor for posts and with all accessories complete. 2

Removing of Loose Boulders Providing and laying of Spot rock bolting for a depth of 5-6m, 5 with a 32mm dia continuous threaded bar including drilling and grouting Providing and laying of mechanically woven double twisted hexagonal shaped Zn+PVC Coated Gabions of Mesh wire Dia. 2.7mm / 3.7mm and Mesh type 10x12 including lacing, tying and filling of Gabions with stones of required sizes and quality etc, for Gabion walls wa complete. Other miscellaneous civil works such as providing proper drains, toe collection system of loose rocks, access roads to the top etc.

Cum

950

Nos

28800

Cum

4000

2700

TOTAL

28,500.00

460,800.00

10,800,000.00

26,257,860.00

157,547,160.00

Comprehensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Section 2: Introduction Site Details Location Stretch Details

Tinku Nalla

General Information: Type of surface Average inclination of rock slope w.r.t. Horizontal Total width of the stretch (W) Total Sloping Height (H) Vegetation (if any)

Approach to top portion of Slope Distance Available at the top of slope (for Top anchoring) Type of strata at Top of Cutting slope

Nalla with debris flow [째]

[m]

5-10

[m]

Debris type(soil/ boulders)

Yes / No

[m]

Soil/Rock/Rock Rock with Soil cover

Comprehensive hensive CAT Plan of Satluj River Basin

Big Boulders

Volume: II Section: 1I Page No:

Distance between slope bottom and infrastructure Whether any erosion control measures to be provided on the face: Whether Toe protection measures are to be provided

[m]

NA Yes

Yes

Proposed Solution

Problem The nalla here is of 5 â&#x20AC;&#x201C; 10 m width and it carries rocks along with water and deposits it onto the road below the nalla.

To prevent the rocks from reaching the road, two debris flow barriers are ar to be provided on the upstream of the nalla. Also a culvert should be made at the bottom of the road to allow for a free passage of water downstream, thus the problem of water flowing over the road can be avoided.

Typical Cross-section section:

Comprehensive hensive CAT Plan of Satluj River Basin

Volume: II Section: 1I Page No:

Notes:

Costing: Location: Tinku Nalla Stretch : Nalla with debris flow Solution: Passive system of Rock fall protection using Flexible High Energy Debris Flow Barriers at various intervals. Assumed Avg. width of Stretch: 10.0m, No. of Barriers : 2 No's Amount S.No Description Unit Qty Rate (INR) Providing and laying of High Energy Debris Flow Barrier System , 6m height comprising of Main Interception Nets and additional Nets , Flexible posts, detachable 1 base plates adequately galvanised, lateral LM 20 300000 6,000,000.00 bracing cables & upslope cables with ground anchors as per design and foundation anchors for posts and with all accessories complete. 2

Cum

950

Nos

28800

TOTAL

28,500.00

460,800.00

1,622,325.00

8,111,625.00 Comprehensive hensive CAT Plan of Satluj River Basin