Self-Drilling Full Thread GFRP Hollow Injection Rockbolt

Self-Drilling Full Thread GFRP Hollow Injection Rockbolt are made of Hard alloy rotation bit, Full thread hollow GFRP bolt rod, Stop grouting plug, Base plate, Nut and Adapter sleeve. The Hard alloy rotation bit be assembled on the end of bar, self-drill in combination with the injection work.

Feature

It be the best solution to the complicated geological conditions such as the Broken surrounding rock, Weak surrouding rock, High geostress large deformation etc.. It avoid any hole collapse happen to block the construction.

Hollow design, realize the injection function, it avoid the loss of mortar in the traditional construction techology.

Realize the filled grounting, as well as the presure injection, improve the quality of engineering.

Under the mutual effect of all components, the rod own the good feature of neutrral position,the mortar cover the rod compeletely, realize the best supporting result.

Full thread rod be made from the Glass Fibre Reinforced Plastic(GFRP) , own the stronger anchoring force, especially the character of corrosion resistant be for the permanent support, better than metal rod.

It is more convenient in any demand of temporary support, such as during the beginning of the tunnel construction, it is easy to shield and excavation.

It is very convenient to assemble and to construct.

Construction method

Apply to the complicated geological conditions such as the Broken surrounding rock, Weak surrounding rock, High geostress large deformation etc… for the normal supporting, the emergency supporting, the collapse supporting and other situation need the self-drilling & injection, it is wide application and good effective.

Assemble the hard alloy rotation bit on the end of bolt rod, directly drill by the Bolt rod which instead of drill pipe, the gadder couple the adapter sleeve on another end of bolt rod, when the drill length meet the design requirement, mount the Stop grounting plug, plate and nut, then start the injection, lock the nut tightly after the mortar are cured. In the construction of tunnel, slope support and hydropower station, adopt the major diameter bolt rod instead of DTH drill pipe, to drill and grout, it is more stronger, the effective is better than Bolt cable, more convenient but lower cost.

Regular Specification : Outer Diamenter : 25mm, 28mm, 32mm