2016年09月21日

Soil nail system


Soil nail system , an ideal anchor system for underground construction, is an environmental
solution for metro tunnel projects. Especially in weak conditions, soil nail has better
reinforcement effect over other anchoring systems. Soil nail system can change themechanical property of surrounding rocks, enhance self-supporting capacity, reduce
deformation of surrounding rocks and then keep tunnel’s stability.
The soil nail system was ideal for top down construction in this project because they
provide a permanent, safe and economic reinforcement of slopes without the requirement for
additional support. The soil nail system installed featured galvanized protection, which
provides comprehensive corrosion protection for soil nailing applications. This application
of soil nail system had great benefits, not only economic ally, but also technically.
Sinorock have the qualifications and experience in the concept of soil nailing , which briefly is to reinforce and strengthen existing ground by installing closely spaced grouted steel bars, called ”nails,” into a slope or excavation as construction proceeds from the ”top down.”
This soil nailing process creates a reinforced section that is itself stable and able to retain the ground behind it. Soil nailing works in tension, bending and shear. Generally, the soil nails significantly increase the apparent cohesion of the soil through their ability to carry tensile loads. A construction facing is also usually required, and is typically shotcrete reinforced by welded wire mesh. This technique is also be used in rock, to anchor structures against the floatation reaction due to ground water.
We have used a variety of different equipment to carry out the process. We have used the Wimmer Rock drill with the most effective results due to the versatility of the Unit. The Wimmer Rock drill is machine mounted on a 30 ton excavator and can Drill and install at any angle,through any material, from any position.


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