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
• 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 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.
The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.
R thread anchor bar or called rock bolt, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.
roduct Name: rock tools jack hammer drilling rod extension rod Description: rock tools jack hammer drilling rod extension rod
Thread drill rod Made with best quality carbon steel bar,through heat treatment like Atlas.
Material: carbon steel bar MOQ: No MOQ required for testing and trial order Body Type
Round shape and hexagonal type
Thread type R25,R28,R32,R38,T38,T45,T51 Diameter Hex25,Hex28,Rd32,Rd38,Rd45,Rd51 Type Thread extention Rod and MF rod Length