Novel grouting anchor rod

Abstract

The invention discloses a novel grouting anchor rod which comprises a hollow anchor rod body, a drill bit arranged at the front end of the hollow anchor rod body, a slurry stopping plug, an arch-shaped support plate, a fastening nut and an anchoring connection sleeve, wherein the slurry stopping plug, the arch-shaped support plate and the fastening nut are sequentially arranged at the rear end of the hollow anchor rod body, and the anchoring connection sleeve is arranged in the middle of the hollow anchor rod body. The anchoring connection sleeve comprises a cylindrical sleeving cylinder and three anchor bars hinged to the cylindrical sleeving cylinder and uniformly distributed on the outer circumference of the cylindrical sleeving cylinder; grooves sunken towards the axis direction of the cylindrical sleeving cylinder are formed in the cylindrical sleeving cylinder and are matched with the anchor bars; one ends of the anchor bars are hinged to the cylindrical sleeving cylinder through hinging shafts inside the grooves; grouting holes communicating with a hollow core part of the hollow anchor rod body are formed in the grooves; and the hollow anchor rod body is cut into two segments through the cylindrical sleeving cylinder and is connected and fixed in a threaded connection mode. The novel grouting anchor rod is reasonable in structural design and convenient and easy to use, and grasping force of cement columns after slurry solidification can be increased.

Description

technical field [0001] The invention relates to the field of geotechnical engineering support structures, in particular to a novel grouting anchor rod. Background technique [0002] During the excavation process of roadway engineering, traffic tunnels, and rock and soil slopes involved in geotechnical engineering, the deformation of the surrounding rock increases significantly due to the influence of self-excavation, adjacent roadway excavation, and working face advancement. In order to prevent the deformation of the surrounding rock from threatening the safety of workers and affecting the normal production of the working face, it is essential to reinforce the surrounding rock of the working face. [0003] The main problems encountered in the actual application of the existing grouting bolts are: the gripping force of the grouting bolts on the cement column after the mud is solidified is not enough, and it is separated from the cement column, which makes the reinforcement of...

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a new type of grouting anchor, aiming to solve the problem that the existing grouting anchor has insufficient gripping force on the cement column after the mud is solidified, and is separated from the cement column, so that the surrounding rock of the grouting anchor can be reinforced Reduce and generate potential safety hazards;

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