Self drilling anchor bar

The self drilling hollow grouting anchor rod adopts a hollow design, and the hole in the rod body is used as the drilling high-pressure air-water channel and grouting channel. Compared with the solid rod body, the hollow rod body design can obtain better rigidity and shear strength. The outer surface of the bolt has a standard large-pitch thread structure. The thread structure is convenient for cutting and connecting the bolt. Compared with the smooth rod body, the bonding area between the bolt body and the grouting material is increased, thereby improving the anchoring force.

Complex geological conditions such as weak surrounding rocks and fault fracture zones are common in various underground projects, which brings great difficulties to the construction of rock anchors, especially in the case of serious collapse and the need for extra-long bolts. The bolt is powerless. The self-advancing (drilling) hollow grouting bolt series integrates functions such as drilling, grouting and anchoring. It can be used in tunnel advanced support, radial support and various slope treatment projects. It is very good to improve the surrounding rock and achieve the ideal supporting effect.