Some advantages for making Self drilling anchor bolt as a good mean

Why self drilling anchor bolt can be applied widely?Here give some points.
Self drilling anchor bolt has the advantage : High Adaptability to Circumstance
Self drilling anchor bolt has two performances: drilling and grouting. It features a hollow bore for flushing, or simultaneous drilling and grouting. It can be installed in sites with weak rocks, loose soil, weathered layer, sand with stone layer where it is so difficult to create a hole in complex formation. The unconsolidated ground conditions favor the self drilling anchor bolt technique for fast and simple method of installed compared to the traditional method, which was confirmed by the application in Vertical Shaft at Left Bank of Xiluodu Hydropower Station.It’s widely applied to pre-support project, radial support project, slope stabilization, foundation support project, roadway support project, soil nail wall, back pull anchor rod retaining wall and other rock supporting work.
Other advantage: Low Cost
In recent years, with the continuous development of hollow grouting technique and the promotion, the application range of Self drilling anchor bolt is expanding and its accessories production is increasing dramatically. Therefore, the raw material processing and the rolling equipment production of Self drilling anchor bolt presents the large-scale development trend, which significantly reduces the cost of Self drilling anchor bolt.
The operating principle of Self drilling anchor bolt decide that the other advantage of Self drilling anchor bolt:Great Durability.
The grouting of the Self drilling anchor bolt is from inside to outside through the inner hole. Besides, there are stop plug and plate outside the anchor hole, which can effectively prevent slurry spillover. So the Self drilling anchor bolt can form thick and homogeneous layer,  which greatly enhance its durability.

http://sinorock.publicoton.fr/some-points-for-improving-the-safety-performance-of-anchor-bolt-system-611720