Spiral fin grouting anchor cable assembly with adjustable angle

Abstract

The invention designs a spiral fin grouting anchor cable assembly with an adjustable angle. The spiral fin grouting anchor cable assembly comprises an anchor cable body and an anchorage device, wherein the anchor cable body is formed by stranding steel strands by taking a grouting pipe as a cable core; the grouting pipe is in a pipe shape, and is composed of a cement outlet, a cement spraying hole and a grouting opening; the anchorage device comprises a tray, an anchor ring and an anchor cable clamping piece, wherein a hemispherical concave table of the tray is matched with a hemispherical protruding end of the anchor ring; the anchor cable body penetrates a through hole of the tray, and penetrates out from an anchoring hole of an anchor ring cylinderical end through the matched tray and anchor ring; the anchor cable body is clamped by the anchor cable clamping piece in the anchoring hole; the anchorage device and an anchor cable are enabled to always keep vertical after being stressed by the anchorage device through a self-adjusting function, so that a bite force can be guaranteed to be uniform; under an equivalent acting force, the probability that the anchorage device drops off and glides can be greatly reduced. With the adoption of the spiral fin grouting anchor cable assembly with the adjustable angle, the combination of anchor cable support effect and grouting reinforcement effect is realized, so that the anchoring range and the anchoring force are greatly increased, and the consumption of a drill hole drilling machine and anchor cable materials is saved, thereby the cost is lowered.

Description

technical field [0001] The invention relates to a support structure for a shaft, in particular to a self-adjusting angle spiral rib grouting anchor cable assembly. Background technique [0002] Since the reform and opening up, my country's shaft support technology has been continuously developing and progressing. The shaft support technology can be classified into traditional support, metal bracket support, bolt and anchor series support and composite support technology. . Among them, anchor cable support is widely used in various roadways because of its simple construction, which can be combined with various support measures, short construction period and low cost. [0003] Anchor cable support is realized by using anchoring agent to anchor the anchor cable, and anchorage tensioning the anchor cable. At present, the anchor cables supported by anchor cables are all twisted by several strands of smooth steel twisted wires. Since the periphery of the anchor cable is a smooth...

AI Technical Summary

Problems solved by technology

Secondly, because the anchoring part of the anchoring agent is short and very uneven, it cannot achieve a good anchoring effect

When installing the anchoring agent, first insert the anchoring agent into the drill hole, and then forcefully insert the anchor cable for stirring. However, most of the inserted anchoring agent is pushed to the deepest part of the hole by the anchor cable, and the dry anchoring agent (thinner The anchoring agent will flow out of the hole when it is not solidified) After stirring and mixing, the actual anchoring part of the anchoring agent that should be 1 meter long is only about half a meter, and there are many gaps in the anchoring part, and the anchoring agent is not completely solidified with the anchor cable and the rock wall Integrate into a whole, can't achieve good anchoring performance, even often when installing anchors, the anchor cable will be pulled out of the hole if the prestress is not reached, directly causing anchoring failure

Nowadays, the anchors used in the anchor cable support commonly used in tunnels and roadways are all cylindrical, and the upper and lower sides are flat anchors. When drilling the anchor cable holes, no matter whether it is mechanical or manual drilling, the safety of the holes cannot be guaranteed. The verticality between the trend and the plane of the orifice, which causes the anchor cable and the anchor to be installed at the orifice cannot be completely vertical when the anchor is installed, causes the force of the anchor to tension the anchor cable to be non-vertical, and the clip of the anchor is affected. If the force surface is uneven, the occlusal force of the anchor cannot be maximized and optimized. Once the force surface of the anchor is uneven, it is easy to cause insufficient tension, the anchor gradually slides down, or even falls off the anchor, so that the anchor fails completely. When human beings do not find out, security risks will occur

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