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T-Thread Hollow Anchor Bar / Mining Machines SDA All Thread Hollow Bar

Anchor bolt

Anchor bolt means a rod that transfers the structures or geotechnical load to a stable rock

formations, it consists of rod, drill bit, coupling, plate, grouting stopper and nut. It has been

widely used in tunnling, mining, slope stabilization, tunneldiseases treatment and roof supporting

of undergroundworks. It is for loose ground(clay, sand friable etc.) Hollow anchor rod is made of

seamless tube with high strength.

Features of hollow grounting anchor bolt

• Particularly suitable for difficult ground conditions.

• A high rate of installation since drilling, placing and grouting can be performed in one single operation.

• Self drilling system eliminates the requirement for a cased borehole.

• Installation with simultaneous drilling and grouting possible.

• Easy installation in all directions, also upwards.

• Suitable for working in limited space, height and in areas of difficult access.

• Simple post grouting system. • Hot-dipped galvanizing for corrosion protection

Applications in Tunneling & Ground Engineering

• Radial bolting

• Slope stabilization

• Forepoling

• Micro injection pile

• Face stabilization

• Temporary support anchor

• Portal preparation

• Soil nailing

Self-Drilling Anchor Bolt Description

  R25N R32N R32S R38N R51L R51N T76N
Outside Diameter (mm) 25 32 32 38 51 51 76
Internal Diameter (mm) 14 19 16 19 36 33 52
Ultimate Load Capacity (kN) 200 280 360 500 550 800 1600
Yield Load Capacity (kN) 150 230 280 400 450 630 1200
Tensile Strength, Rm (N/mm2) 800 800 800 800 800 800 800
Yield Strength, Rp0.2 (N/mm2) 650 650 650 650 650 650 650
Weight (Kg/m) 2.3 3.2 3.6 5.5 6.5 8.0 16.0
Steel Grade EN10083-1 (Alloy Structure Steel)
Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical.

 

 

 


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