hollowbar的部落格

Sinorock hollow steel bar is a valuable and multi-functional additions to engineers
1.Powerful anchorage:with T-thread type,the self drilling hollow steel bar can be well connected by couplers and bonded best with grout.
2.Excellent anchorage:since cement grout is injected from the bottom of borehole,full and unniform coverage of grout can be done along the full length of rock bolt.
3.Convenient construction:compared with traditional anchoring process,the procedure of drilling,anchoring,installing grouting pipe can be completely prevented,which makes the construction full of convenience.
4.By contract with common hollow bar,self drilling hollow steel bar makes grouting can be operated after anchoring.And grouting pressure is up to ten kilogram,hollow steel bar can not noly be used to fill borehole but also improve the structure of surrounding soils by injecting cement grout into the crevice of rock in poor mass,under high grouting pressure,the good anchoring effect can be clearly seen.
5.Hollow steel bar is combined of full thread rock bolt,exhausting pipe,anchor head,stop-grouting plug,anchor plate,anchor nut.
6.Use anchor trolley or air gun drilling, and Delicate hole with high pressure.Use mine auger to drill borehole when facing complicated soil conditions.