Elevated metro rail project parameters by Siva Subbiah

DESIGN STANDARDS AND SPECIFICATIONS AS PER RDSO

CONTENTS DESIGN BASIS FOR VIA DUCT METRO RAIL DESIGN BASIS FOR ELEVATED STATIONS  TRACK SYSTEM FOR METRO RAIL RAILING SYSTEMS

BALLAST LESS TRACK DERAILING SYSTEM  VIA DUCT PIERS

FLOW CHART FOR METRO CERTIFICATION ANNEXURES IN METRO RAIL MANUAL

TEST CERTIFICATES REPORT MANUALS  LIST OF RAILWAY STANDARD SPEC’S REFERENCES

DESIGN BASIS FOR VIADUCT OF METRO RAIL SYSTEM SL.No

Description

Concrete Density

Modular Ration

1 3

Clause & Codes

Cement

Clause 4.1 of IRS CBC

Youngs Modulus

Clause 5.2.2.1 of IRS CBC

IS : 875 Part 1 .

Clause 5.2.6 of IRS CBC

Grade of Concrete

Thermal expansion coefficients

Reinforcing Steel

Clause 4.5 of IRS CBC

Jacking Force

Clause 16.8.1 of IRS CBC Clause 16.8.2 IRS CBC Clause 16.8.3 IRS CBC

Poissons Ratio

Prestressing Steel for Tendons

Prestress Losses

Sheating

Recommendations

33,43,53 Grade Cements as per IS:456:2000

24 to 25 KN/m3 for RCC 23KN/m3 for PCC 280/fck

Clause 5.4.4 an 5 of IRS CBC Clause 2.6.2 of IRS Bridge For steel and reinforced concrete 11.7x10^-6 per 1 °C Rule , Ɛ = 1.17 x 10^-5 / °C for plain cement concrete 10.8x10^-6 per 1 °C 0.15 for all concretes

Clause 4.6 of IRS CBC

Clause 7.2.6.4.2 of IRS CBC

80% of the Characteristic Strength

DESIGN BASIS FOR VIADUCT OF METRO RAIL SYSTEM 13 14 15 16 17 18 19

Anchorage

Clause 7.2.6.4.3 of IRS CBC

Fabrication

IRS B1 Fabrication Code

Welding

IRS Steel Bridge code

Steel

Design of Steel Structures Miscellenous Structural Steel Hollow Steel Section

IS 2062

IRS Steel Bridge code IS 800

IS 4923

Structural Steel Tube

IS 1161

Loads for Designs

Dead Load, Shrinkage and Creep, Super Imposed Dead Load, Live Load.

Coefficeint of Dynamic Augment

as per IRS Bridge Rule

Footpath Live Load

Clause 2.3.2 of IRS Bridge Rule

Bracking & Traction

Clause 2.8.4 & 5 , 2.8.3.4 of IRS Bridge Rule

20 21

Steel for General Structure

IS 2062

DESIGN BASIS FOR VIADUCT OF METRO RAIL SYSTEM 26 27 28 29 30 31 32 33 34 35 36

Centrifugal Force Gradient Effect Wind Load

Seismic Load Temperature Over all Temperature Differential Temperature Temperature Gradient

Differential Settlement Vechicle Collision Load on Piers Racking Forces

Vibration Effect

Crack Width Fatigue Check in RCC and PSC structures

Forces on Parapet

Clause 2.5 of IRS Bridge Rule As per Site Condition Clause 2.11

RDSO Guidlines on Seismic Design of Railway Bridges (Januany 2015)

Clause 215.2 of IRC:6-2010 As per IRC:6-2010 Clause 215 of IRC:6-2010 Clause 222 of IRC:6-2010

Broad gauge bridges : 1.47 kN/mm2 (150 kg/m2) Meter and Narrow gauge bridges : 0.98 kN/mm2 Foot bridges : 0.74 kg/mm2

all as per IRC:6-2010 clause 215

12mm for Long Term Settlement, 6mm for Short term Settlement

Clause 2.9 of IRS Bridge Rule

Movement of metro train on station bridge will be considered Clause 2.10 of IRS Bridge Rule IRS CBC 15.9.8.2 , 10.2.1, 15.6.7,10.4.1,11.3.4 and 13.3 Clause 13.4 of IRS CBC

Welding may be used to connect bars subjected to fatigue. Lap welding is not used.

DESIGN BASIS FOR VIADUCT OF METRO RAIL SYSTEM 41

Steel Structures

Cover to Reinforcement

Durability

As per IRS Steel Bridge Code. Clause 5.4 of IRS CBC

Clause 15.9.2 of IRS CBC

Bridge in sea : 50 years; Clause 15.1.3 and 16.1.3 of IRS Bridge in Coastal Area : 80 years; CBC Bridges in Rest of India : 100 years;

Design Life

Drainage of Deck

Bearing System

European Standard 1337, Clause 15.9.11.3 & 15.9.11.4 of IRS CBC

Pile Foundation

IRS CBC Table 12 , IS:2911

Pier Cap and Pier

Clause 10.4.1.1 & 15.2.2 of IRS The minimum cross slopes in the deck shall be kept at 2.5% CBC

Clause 17.2.3 of IRS CBC

As per acutal ground data and 49 Soil Structure Analysis tests as per IS 2720 *IRC - Indian Roads Congress *IRS CBC - Indian Railway Standard Concrete Bridge Code *RCC - Reinforced Cement Concrete *PSC - Pre Stressed Concrete *SOD - Schedule of Dimensions

DESIGN BASIS FOR ELEVATED STATIONS OF METRO RAIL Sl.No 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

Description

Cement PCC and RCC Modulus of elasticity (Ec) Pre stressed concrete Modular ratio

Prestressing Steel for Tendons & Youngs modulus , Density Prestressing Units Maximum initial Pre stress Sheathing Hollow Steel Sections General Steel Purposes Steel tubes for structural Composite Steel Structures Fabrication Reinforcement

16 17 18

Reinforcement Detailing Durability Concrete Grades

21 22

Crack width Clearances

19 20

Cover to Reinforcement Fire Resistance Period

Clause & Codes cl 5.1 of IS:456 & IS:1343 cl 6 to 10 of IS:456 & IS:1343 cl 6.2.3.1 of IS:456 & IS:1343 cl 6.2.3.1 of IS:1343 Annexure B of IS:456

cl 5.6.1of IS:1343 hyper links\456n1383\Slide2.JPG cl 13 of IS:1343 cl 19.5.1 of IS:1343 cl 12.2 of IS:1343hyper links\456n1383\Slide3.JPG IS: 4923:1997 IS: 2062 IS: 1161 IS:11384 & IS:3935 IRS B1 cl 5.6 of IS:456 & cl 5.6.2 IS:1343

cl 12 , 26 of IS:456 , 12.3 & 19.6.3 of IS:343hyper links\456n1383\Slide4.JPG cl 8.0 of IS:456 & IS:1343 As per design load.

Recommendations

Concrete and its workability Ec = 5000â&#x2C6;&#x161;fck

Structural Design working stress method About Gripping, Anchorage, Tensioning, Releasing Max tensile stress not exceed 76% of ultimate strength Design will be considered as per IRS Bridge Rule Otherwise shall be done as per IS:800 For seismic zone III to V minimum elongation 14.5% as per IS:1786 hyper links\456n1383\Slide5.JPG Section 15 of IS:800 for Steel structures Recommendation as per Design Mix

cl 26.4 of IS:456 & 12.3.2 of IS:1343 hyper links\cover.jpg Section 16 of IS:800 for steel Minimum Fire resistance period of 2 hrs cl 35.3.2 & 43 of IS:456 cl 20.3.2 & 24.2 of IS:1343 Allowable 0.1 mm to 0.3mm. Annexure F in 456 As per Indian Road Concgress (IRC) and Schedule of Dimensions(SOD)

DESIGN BASIS FOR ELEVATED STATIONS OF METRO RAIL SL.No Design Loads 1 Dead Loads 2 3 4 5 6 8 9 10 11 12 13 14 15 16

Super Imposed Dead Loads Imposed (Crowd) Live Load Earthquake Loads Drift Limitation Sesimic Loads Wind Loads Collision/Derailment/Impact Erection Loads Temperature Shrinkage Creep Earth & Water Pressure Surcharge Load Pre-Stressing Force

17 18 19 20 21 22 23 24 25

Long Welded Rail force Settlement Other Forces & Effect Ultimate Load Combinations Serviceability Load Combinations Deflection Criteria Lateral Sway Fatigue Check : RCC and PCC Fatigue Check : Steel structures

Foundations

Recommendations Actual Cross Section and unit weight of materials. All the weight of materials on the structure that are not structural elements but permanent. Minimum considerations as per IS : 875 Furniture and movable loads, as per cl 19.3 of IS 456 as per IS:1893 (part 1) cl 7.11.1 in IS:1893 IS : 13920 and IS : 4326 IS : 875 part 3 Road traffic as per IRC:6 and for Metro as per IRS Bridge Rule The weight of all temporary and permanent materials together. As per clause 19.5 of IS:456 and cl 215 of IRC-6 As per clause 6.2.4 of IS:456 & IS:343 & cl 5.2.3 of IRS CBC As per clause 6.2.5 of IS:456 & IS:343 & cl 5.2.4 of IRS CBC As per IS:875 Part 5 and cl 5.7 of IRS the pressure exerted by surcharge from moving load , underground pump are accounted. As per IS:343

I shall be specified by metro duly supported by either codal provision or calculation. If RSI is not practicable As per Table 1 of IS:456 As per cl 19.6 of IS:456hyper links\456n1383\Slide6.JPG Table 18 of IS:456(RCC), Table 7 of IS:1343(prestressed),section 3 and 5 of IS:800 for steel structures, cl 6.3 of IS:1893 part 1, IRS CBC and RDSOhyper links\aa.jpg hyper links\bb.jpg As per cl 23.2 of IS:456 for RCC and IS:1343 for prestressed concrete. It should not exceed H/500 at top of the building , H - height of the building. As per cl 13.4 of IRS CBC As per cl 3.6 of IRS Steel bridge code and section 13 of IS:800 and as per IRS Steel bridge code. IS 2911 for Pile, IS:1904 & IS:8009 for foundation type, IS:6403for SBC, IS 3370 for water retaining structures.

TRACK SYSTEM FOR METRO RAIL

•Guage – Standard (1435mm) •Speed potential – 110kmph •Rail Section – 60kg

•Guard Rail – Inner Guard rail on via duct •Static axle load – 20t(max)

•Design temperature range – 10ºC to 70ºC •Ballast less Track Structure

•Gradient and Super elevation •Derailment Guards •Fastening Systems •Check Rail

•Restraining Rail

•Turnouts, Scissors and Cross overs •Switch systems and Expansion •Locking systems

•Noise and Vibration

RAILING SYSTEMS CHECK/GUARD RAILS and DERAILMENT GUARDS :

They are apparently introduced on curves and special layouts to facilitate the operation of multi Axile rigid frame vehicles with long axle base. Check rails are provided to: •Avoid derailment due to flange climbing, •Reduce rail wear of high rail •Improve vehicle curving performance. • Presence of sharp curves • Very limited time for track maintenance and worn rail replacement As per schedule of dimensions SOD, check rails should be provided on curves having radius 218m or less on Broad Gauge(1676mm) and radius 125m or less on meter gauge (1000mm) In case of other country consideration US Pennsylvania : 228.6m ( 750 ft ) US Washington : 236.22m ( 775 ft ) US Chicago : 152.4m ( 500 ft )

Flang width is the most important parameter in the design of a check/restraining rail which need to be decided on 1. Wheel Flange angle 2. Wheel – Rail friction coefficient 3. Track perturbation limits.

RAILING SYTEMS

TOLERENCES IN TRAINING Attainment of the following tolerances when installed and later, during services.

Radius of Curve

Track Guage

Flangeway width

175>R>150m

1435mm

45mm

150>R>125m

1440mm

50mm

125>R>100m

1445mm

55mm

BALLAST LESS TRACK

Basic Requirements of Ballastless Track are Stability, Durability, Elasticity, fastening

+ : low maintenance, increased life, high lateral track resistance for future needs

- : expensive, noisy, more ground vibrations, no geometric corrections

BALLAST LESS TRACK

DERAILMENT SYSTEM

Railway Board directive to provide up-stand clearance of 210-290mm need review. Most world Railways adopt a clearance of 180-190mm.

It shall no be lower than 25mm below the top of the running rail easy for re installation and maintenance. The plinth minimum width has to be min to reduce dead load on substructure. Clearance of 180-240mm is expected to meet the requirements of MTS.

The plinth width should be sufficient to accommodate both the derailed wheels.

DERAILMENT SYSTEM ( ARROW MARK SHOWING THE BEAMS)

VIA DUCT PIERS

FLOW CHART FOR METRO RAIL PROJECT CERTIFICATION

ANNEXURES IN METRO RAIL MANUAL

CONTENTS AND BASIC TESTS IN METRO RAIL STUDY REPORT AND MANUAL

TEST CERTIFICATES / REPORTS / MANUALS •Dynamometer test •Brake Calliper test •Static and Fatigue tests of bogie system •Bogie rotational resistance test •Oscillation trials •Wheel offloading test •Tests for Wheel, Wheel set and Solid axle. •Other tests as per IS standards for materials, durability and strength • Tests for Rolling Stock Material and Electrical • Testing and Communication Tests •Performance report of Existing Operation •Full details of Rack composition and section •Joint Safety Certificate issued by concern metro •Track certificate issued by concern metro •Bridge certificate issued by concern metro •Reports for CRS ( Certified Residential Specialists) for conducting trail •Speed Certificate • Operations , Safety, Disaster Management, Maintenance Manuals.

LIST OF RAILWAY STANDARD SPECIFICATIONS

REFERENCES