Advantages of Sinorock hollow bar anchor for difficult ground conditions

04/gen/2017 10:10:25 hollowbar Contatta l'autore

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Hollow bar anchor is suitable for broken rock, loose soil and conditions which are difficult 

to drill holes, such as fracture zones, decayed rock, gravel, sandy gravel, backfill ground. 

In order to have optimal result, drill bits can be used differently according to the rock 


Here the advantages of Sinorock hollow bar anchor

1. Low cost.

Compared with traditional supporting technologies, hollow injection anchor effectively 

decreases input and transport of supporting materials, then reduces materials’ cost.

Because hollow injection anchor penetrates into surrounding rock body, tunnel cross-section doesn’t need to be taken up, at design, it can decrease cross-sectional area, which will 

save excavation cost.

The stability of hollow injection anchor supporting is good, it can decrease amount of 

maintenance and then reduce cost of maintenance.

2. Rapid supporting function.

Compared with traditional supporting patterns, hollow injection anchor has small amount of materials and light weight, which can fasten transport speed and improve excavation 



During excavation, application of hollow injection anchor can reduce workers’ labor 

intensity, decrease operation procedure and improve working efficiency.

Hollow injection anchor combines drilling, grouting and anchoring together, construction 

procedure is simple. It can realize rapid surrounding rock support.

3. Good supporting effect.


Through analysis of hollow injection anchor supporting mechanism, hollow injection anchor 

belongs to active support. Using rock bodies’ self-supporting capacity to form stable 

structures, which can improve stability of integrity.


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