hollowbar的部落格

Introduction:
After putting the hollow bar into the cavity,rotate the hollow bar until the expansion shell fully expanded and make friction resistance between the expansion shell and nut to make expansion shell self drilling hollow bar form a rapid anchoring force prestressing.
Application:
This kind of product is applied for temporary and permanent support in relatively good geological ground conditions,especially for hard rock,horizontal bedding and jointing fissures with cimentitous grout.Prestressing on the expansion shell will form the supporting force to control the deformation of surrounding effect by grouting.
Features:
1.Appling active tension for keep wall rock from deforming to support rapidly.
2.Being used for permanent support as well as temporary support.
3.Rapid construction for immediate and safe support.
4.Through the hollow grouting,the loss of prestressing force and corrosion of the self drilling hollow bar can be further avoided,meanwhile it can surpress the occurrence and development of rock burst efficiently.
If you have any question about our friction hollow threaded bar please don't feel hesitate to contact us at any time,we are appreciate for your support very much!
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