Reverse three-claw type centering support structure for hole mortar anchor rod

Abstract

The invention discloses a reverse three-claw type centering support structure for a hole mortar anchor rod. A rock-soil body, the anchor rod, a first centering support, a second centering support anda third centering support are included; a hole is formed in the rock-soil body, and is internally provided with the anchor rod; the outer side wall of the anchor rod is fixedly connected with the first centering support, the second centering support and the third centering support at equal intercepted intervals through welding surfaces; first connection rods and second connection rods are sequentially welded to of the sides, close to the anchor rod, of the first centering support, the second centering support and the third centering support; and a reverse triangular support is fixedly connected to the top end of the other sides of the first centering support, the second centering support and the third centering support. According to the reverse three-claw type centering support structure for the hole mortar anchor rod, due to the fact that the outer side wall of the anchor rod is fixedly connected with the first centering support, the second centering support and the third centering support at equal intercepted intervals through the welding surfaces, the purpose of keeping the anchor rod in the middle in the hole is achieved, and it is prevented that under the self-weight effects,the anchor rod is tightly attached to the rock-soil body.

Description

technical field [0001] The invention relates to the technical field of bolt centering brackets, in particular to an inverted three-claw centering bracket structure for hole mortar bolts. Background technique [0002] In the stabilization and reinforcement of high slopes and tunnels, mortar bolts are widely used as a simple and effective support component. The anchor rod is made of a steel bar with a certain radius and a certain length as its main material, and a steel bar with a radius of 3mm is welded on its surface as its centering bracket. The centering bracket supports the anchor rod and ensures that the rod body is centered when the anchor rod is working. components (such as figure 1 shown), to ensure the thickness of the mortar protective layer after grouting, and to achieve an effective stress effect through mutual force transmission between concrete and steel bars. There is a great deal of work on different forms of centering brackets, and their different roles and...

AI Technical Summary

Problems solved by technology

However, there are certain technical defects. Firstly, the centering effect is not good, and the anchor rod is not placed on the center line of the hole; secondly, the centering support has concentrated stress and is easy to deform, so it cannot achieve effective pull-out resistance; finally , when used on a working face with an inclination angle greater than 90 degrees, it is easy to produce outward displacement, shorten the length of the locking section, and reduce the force

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