MEGABOLT – SDA Self-Drilling Anchor Bolts
Shakti Commodities Pvt. Ltd. 79 Shyamlal Road, Daryaganj, New Delhi - 110002 Tel: +91 11 23245112 mail: megabolt@scpl.in
MEGABOLT–SDA SYSTEM The illustration below displays the three application areas of MEGABOLT-SDA
Slope Stabilisation:
The MEGABOLT-SDA is used to stabilize unstable rock/soil formations. The unconsolidated or weathered ground conditions favour the SDA technique for fast and simple method of installation compared to the traditional methods.
Foundations with micro piles: MEGABOLT-SDA micro piles can be defined as drilled piles, composed of injected grout with the MEGABOLT-SDA anchor rod as steel reinforcement. They can be installed in sites with limited space using light drilling equipment, can be installed into most ground conditions including rock and are suitable for tension and compression loads. The big advantage is the combined drilling and grouting making high piling outputs possible.
Tunnelling:
MEGABOLT-SDA anchors are the most economical solution for the reinforcement of the tunnel circumference and advanced roof support for tunnel excavation in overburdened and soft fractured rock conditions.
MEGABOLT–SDA COMPONENTS:
MEGABOLT- SDA is a bolting solution for unstable ground conditions such as sand, gravel, silt, and clays, and in soft to medium fractured rock formations. For projects facing such ground conditions, MEGABOLT-SDA self-drilling anchors should be considered as the main productivity solution. The MEGABOLT-SDA solution is designed for optimized installation, tailored to the project’s needs. By drilling a hole in collapsing soil or loose rock, with a sacrificial drill bit and a hollow rod, and after the drilling operation injecting cementitious grout or resin into the hollow rod and surrounding cavity, the MEGABOLT-SDA self-drilling anchor is a top productivity solution. MEGABOLT-SDA self-drilling anchor consists of: Hollow Anchor Rods (Cold threaded) Hexagonal nut Bearing plate Extension couplings, if the anchor consists of several anchor rod sections hollow anchor rod(s) Sacrificial drill bit
Hollow anchor rods The anchor rod features a hollow bore for flushing, or simultaneous drilling and grouting, and has a left-hand thread for connection to standard drill tooling. It is manufactured from API standard thick wall steel tubing, cold rolled to a standard ISO rope thread profile. The standard rope thread of the anchor rod produces an excellent bond between the rod and grout, as well as enabling connection to drill accessories.
Hexagonal Nuts The hexagonal nuts are manufactured from high precision steel with chamfered edges on both ends from high precision steel, and tempered to meet the stringent demands on anchor specifications and the daily operations of under- ground work. All nuts exceed the ultimate strength of the bar.
Extension couplings The coupling enables direct end- to-end energy transmission between each bar, reducing losses and ensuring maximum percussive energy at the drill bit. To enable the correct seating of each bar within the coupler, all bars are chamfered with precision to enable the bar ends to have face-to-face contact
Bearing plates The bearing plates are steel plates with a centre hole. All functional parts are constantly tested. These are available in different dimensions and thickness, depending on application.
MEGABOLT - SDA
Technical Data -
MEGABOLT -SDA SYSTEM R32 L
R32 R32 N
R32 S
R38 R38N
R51L
R51 R51 N
T76 N
T76 T76 S
Anchor Rods Outer diameter Internal diameter Cross-sectional area Ultimate tensile load Yield load
mm mm mm2 kN kN
32 21.5 304 210 160
32 18.5 396 280 230
32 15 488 360 280
38 19 717 500 400
51 36 776 550 450
51 33 939 800 630
76 51 1835 1600 1200
76 45 2400 1900 1500
Extension couplings Diameter Length
mm mm
42 145
42 145
42 190
51 220
63 140
63 190
95 200
95 200
Nuts Key size Length
mm mm
46 45
46 45
46 45
50 50
75 70
75 70
100 80
100 80
Anchor plates Dimensions Thickness Hole diameter
mm mm mm
150x150 8 35
200x200 10 35
200x200 12 35
200x200 12 41
200x200 30 60
250x250 40 60
250x250 40 80
250x250 60 80
R32/51 R32/76 R32/51 R32/51 R32/51 R32/76 R32/76
R32/51 R32/76 R32/51 R32/51 R32/51 R32/76 R32/76
R38/76 R38/90
T76/130
T76/130
T76/120
T76/120
Drill bits* EX
Cast hardened cross-cut drill bit
EXX EC ECC EY EYY
Tungsten carbide cross-cut bit Hardened tri-crescent drill bit Tungsten carbide tri-crescent bit Hardened tri-crescent drill bit Hardened tri-crescent drill bit
R32/51 R32/76 R32/51 R32/51 R32/51 R32/76 R32/76
ES-F
Cast/hardened button drill bit
R32/51
R32/51
R32/51
ESS-F
Tungsten carbide button drill bit
R32/51
R32/51
R32/51
R38/76 R38/76 R38/90 R38/76 R38/76 R38/115
R51/110 R51/115 R51/110 R51/115
R51/110 R51/116 R51/110 R51/116
Drilling bits to suit different applications For further details / enquiries please contact:
Shakti Commodities Pvt. Ltd. 79 Shyamlal Road, Daryaganj, New Delhi - 110002 Tel: +91 11 23245112 mail: megabolt@scpl.in