The hollow bar is colloquially equivalent to hollow injection bar and it can not only be used as anchor bolt but also break out from the chasm of borehole when the grouting pressure is beyond control,which can conduct a perfect preformance on the reinforcement of surrounding rocks.
The upward borehole should be equipped with stop-grouting plug and exhausting pipe,which can be extensively provided to engineering construction,such as mining,tunneling,slope stabilization,soil nail wall,hydroelectric support project and other civil industries.
Features of hollow anchor bar
1)Easy to provide permanent and temporary support,be capable of controlling the deformation of surrounding rocks and stablizing the layers.
2)Hollow design,it features hollow bar for grouting,placing,drilling simultaneously in a single operation,preventing a heavy loss of mortar in the practice of conventional anchoring process.
3)Good compactness,grout can be performed easily to promote engineering quality.
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