Sinorock self drilling soil nail made for stabilization of tunnel tool
Guangzhou Overseas Chinese Building (hereinafter referred to as "Building") is an expansion project with wholly foreign funds.
The construction site is narrow (construction land area: excavation area = 2: 1), complex geological conditions, high water table, tight time schedule, nine months, with many underground obstacles. By plan demonstration and comparison, it adopts the underground wall - bolt support program, which has achieved good economic and social benefits.
According to preliminary estimates, the program saved ￥350,000 than the original steel bolt support program and shortened the construction period of two months. This is the first time that anchor technology is applied in Guangzhou area. Thus, we can explore and sum up a set of effective measures, and it has a greater significance to apply Sinorock technology in coastal areas .
As an effective anchoring means in tunnel engineering ,Sinorock is largely used as stabilization of tunnel portals, fore-poling, face stabilization, spilling, root piling and radial systematic anchoring.
Its construction features are as follows:
1. Have tow functions of the bolt and grouting pipe. It is a grouting pipe when grouting, then becomes an anchor bolt after grouting without pulling out.
2. The hollow design allows the bolt to achieve a function of grouting tube, which can avoid the loss of mortar when using traditional anchor bolt.
3. Full grouting and pressure grouting. It can improve the project quality.
4. Sinorock self drilling soil nail can be perfectly put in the middle of rock by using the various parts. And its body is wrapped by mortar, which can avoid the danger of corrosion and achieve long-term support.
5. Easy installation. It is easy to install plate and nut without on-site processing thread.
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