Hollow grouted anchor rod provided with simple automatic exhaust device and applied to tunnel

Abstract

The invention discloses a hollow grouted anchor rod provided with a simple automatic exhaust device and applied to a tunnel. The hollow grouted anchor rod comprises a hollow anchor rod body, a rod body hole, a grouting port, an exhaust pipe outlet and an exhaust pipe inlet, wherein the rod body hole is formed in the middle of the hollow anchor rod body and penetrates through the hollow anchor rod body, and an exhaust pipe is mounted in the rod body hole; and the exhaust pipe inlet is formed in the front end of the hollow anchor rod body, the exhaust pipe outlet is formed in the tail end of the hollow anchor rod body, and the end of the exhaust pipe outlet of the hollow anchor rod body communicates with the grouting port. The hollow grouted anchor rod provided with the simple automatic exhaust device and applied to the tunnel has the advantages that the practicability is high, and safety and reliability are guaranteed; and operation is easy during field construction, materials are universal and are not wasted, and the actual purpose of complete grouting of the hollow grouted anchor rod is achieved when the hollow grouted anchor rod is used on a construction field.

Description

technical field [0001] The invention relates to an auxiliary device for tunnel construction, in particular to a tunnel hollow grouting bolt with a simple automatic exhaust device. Background technique [0002] In the process of tunnel construction, the anchor grouting quality of advance support and initial support directly affects the effect of anchor bolts in preventing surrounding rock from breaking and collapsing during tunnel construction. Hollow grouting anchor bolts can be fully anchored in the entire length of the anchor bolt , and can provide a certain support resistance immediately after excavation, inhibit the loosening and deformation of the surrounding rock, avoid or mitigate the occurrence of landslides and roof fall accidents or other diseases during engineering construction and use, especially around the pole body. The thickness of the protective layer greatly enhances the durability of the anchor rod. When using ordinary hollow anchor rods for grouting, becau...

AI Technical Summary

Problems solved by technology

[0002] In the process of tunnel construction, the anchor grouting quality of advance support and initial support directly affects the effect of anchor bolts in preventing surrounding rock from breaking and collapsing during tunnel construction. Hollow grouting anchor bolts can be fully anchored in the entire length of the anchor bolt , and can provide a certain support resistance immediately after excavation, inhibit the loosening and deformation of the surrounding rock, avoid or mitigate the occurrence of landslides and roof fall accidents or other diseases during engineering construction and use, especially around the pole body. The thickness of the protective layer greatly enhances the durability of the anchor rod. When using ordinary hollow anchor rods for grouting, because the grout enters the rod body from the rod head, the end of the bolt rod is located inside the rock mass, causing the air in the rod body to be unable to be discharged. After the air is compressed, the pressure increases, causing the grout to fail to fill the rod body, and there may even be a danger of crushing the grouting pipe, making the bolt construction unable to play its due role

[0003] The existing technology is to connect the two sections of anchor rods into one body through the coupling sleeve device, which has high cost, more material waste and the rod body is not firm

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