Fundamental support with Sinorock hollow anchor bolt from hollowbars's Stories

The fundamental principle of geotechnical anchoring is to transfer tension of structures or keep self stability of excavation face in stratum, relying on shearing strength of Hollow anchor bolt s surrounding stratum.

The main functions of geotechnical anchoring are:

1. Providing resisting power on structures for bearing external load. It directs at point contacting stratum.

2. Producing compressive stress area at anchored stratum or having reinforced effect on rocks.

3. Reinforcing and strengthening intensity of stratum. Also it can improve other mechanical properties in stratum.

4. When hollow anchor bolt passing anchored structures, prestressing force can also be produced on structures.

5. Through hollow anchor bolt, structures and rocks can be chained together, forming a collaborated composite structure, which makes rocks bear effective tensile and shearing force.

Self drilling hollow anchor with drill bit can drill hole with common drilling machine. When reaching to designed location, self drilling anchor and drill bit are left in rock body, grouting can be proceeded directly. Unlike pipe shed, self drilling hollow anchor has injected holes on the top of drill bit, slurry is from bottom to eyelet, then diffuses all around to reinforce surrounding rock. Without pulling out hollow anchor bar and drill bit, it has strong adaptation on surrounding rock, even drilling and grouting at loose and broken surrounding rock.

Self drilling hollow anchor in loose surrounding rock tunnel can be 


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By hollowbars
Added Jun 17

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