A radially lengthened and expanded resistance-increasing anchor rod for the anchoring section

Abstract

The invention provides an anchoring-section radial lengthening expanding type resistance increasing anchor rod. The anchor rod comprises a fixed disc, an outer anchor rod, an expanding section and aninner anchor rod, wherein the upper end of the expanding section is connected to the lower end of the outer anchor rod, the inner anchor rod is arranged in the outer anchor rod in a sliding manner, and the lower end of the inner anchor rod extends into the expanding section; and a second square hole is formed in the expanding section, an expanding mechanism is arranged in the expanding section andconnected to the inner anchor rod, and the inner anchor rod drives the expanding mechanism to enable a cutter plate to be expanded from inside to outside along the second square hole to be inserted into a rock-soil body. The anchor rod has the beneficial effects that the expanding mechanism in the expanding section is provided with the cutter plate and can drive the cutter plate to be expanded inthe rock-soil body; an anchoring section is directly locked in the rock-soil body through the expanding mechanism, so that the anchor rod and the rock-soil body form a whole, and the anchoring forcecan be effectively improved; and on the other hand, when mortar loses efficacy, it can still be guaranteed that the load of the sliding rock-soil body is transmitted to a deep rock-soil body through the anchor rod.

Description

technical field [0001] The invention belongs to the technical field of rock and soil reinforcement, and in particular relates to a radially lengthened and deployed resistance-increasing anchor rod of an anchoring section. Background technique [0002] Anchor is an engineering measure widely used in rock and soil reinforcement. The anchor rod belongs to the tension rod system structure. Through the action of the tension transmission of the rod body, the rock and soil mass that is easy to slide is tightly pressed on the deep and stable rock and soil mass, which increases the friction of the rock and soil mass, thereby improving the shallow rock and soil. stable state of the body. [0003] Most of the bolts use the frictional resistance between the anchorage segment-mortar-rock and soil to provide pullout resistance, but the limited modulus and strength of the mortar material is difficult to provide sufficient pullout resistance; in addition, during the service period of the b...

AI Technical Summary

Problems solved by technology

However, this type of bolt is not suitable for large-depth engineering reinforcement of rock and soil because it is too thin, and the deployment mechanism disclosed in the patent cannot ensure that the elastic attachment can be smoothly inserted into the rock and soil. In addition, the connection between the elastic attachment and the anchor is weak, and There is a problem of insufficient strength

In short, the strength of the blade or attached support for the existing bolt inserted into the rock and soil body is generally insufficient, and the connection between the insertion mechanism and the bolt body cannot bear a large load, and it is prone to breakage, and the effect of enhancing the pull-out resistance is not ideal, which is not conducive to Transformation and application of this kind of bolt in engineering

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