Self drilling hollow soil nail system achieves drilling, grouting, anchoring in one operation. Drill bit can easily penetrate various types of rock under the influence of general drilling machines. A continuous international standard waveform thread can as drill rod to complete drill hole with the drill bit.

Self drilling hollow soil nail system structure
1, Nut: can be transmit unstable rock to the plate.
2, Bent plate: can withstand greater unstable rock stress.
3, Grouting stopper: make grouting maintain a certain pressure to sufficiently fill the void unstable rock.
4, Nail rod: continuous international standard waveform thread, easy to install, coupling sleeve, tighten the nut; and can be cut and connect the extension.
5, Coupling sleeve: Make nail rod can enable extended while drilling to a depth of design.
6, Alloy drill: can pass through various types of rock with a strong penetration.


Self drilling hollow soil nail system is widely used in highway, railway, tunnels and forepoling of water conservancy and hydropower underground caverns. Its suitable for weak boulders and fault fracture zone, complex geological conditions in highland stress large deformation, especially of the hole collapse and other projects in the area of construction, soil nailing one of the most effective methods of economic problems to improve the geotechnical stability and solving complex geotechnical engineering stability.