Some basic knowledge of Sinorock hollow drilling rock bolt

18/gen/2017 10:42:37 sinorockzqq Contatta l'autore

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Rock anchor system is today’s solution for a fast and efficient anchoring system into virtually any type of soil. It has been successfully utilized for plenty of hydropower projects at home and abroad. By more and more practices, rock anchor system is proven to be 

an ideal, effective and environmental solution for hydropower station, railway, highway, subway and mining projects.Quick and reliable technology is essential for construction. Grouting rock anchor can solve 

defects that unfilled grouting of traditional mortar anchor bolt during the construction and can’t grouting with pressure. The operation is simple, cost is low, construction is convenient and efficiency is clear. Grouting rock anchor can save engineering materials and improve utilization rate. It’s a very ideal choice for metro rail and tunneling projects.

The technical features of hollow drilling rock bolt are: the main part of it is a hollow bolt, which can act as a drill pipe and the pipe for grouting. Before grouting may take advantage of the empty properties, blowing dust after rock drilling construction; The hollow bolt can act as grouting channel, when grouting, cement grout ejected from the drill through the hollow bolt, which can make the bolt closely bonded with the surrounding soil, achieving the purpose of the reinforcement of rock mass.


Before drilling, the shank of the connecting rod connected to the hollow bolt body and rock drill, after punching to design depth with the rock drill, installation plate and nut, then grouting. The size of the bit can control the size of the hole, generally the size of the hole is about 2 to 3 times the diameter of the hollow bolt. Since its rod can be freely cut, it is not only suitable for railway, tunnel and slope reinforcement engineering, more suitable for the foundation sink, hole collapse, landslides and other geological disasters of governance.

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