Novel grouting anchoring rod with steel sleeve rod

Abstract

The invention relates to a novel grouting anchoring rod with a steel sleeve rod. The novel grouting anchoring rod comprises a rod body, an anchoring end, an anchoring head and a rod-sleeving device, wherein the anchoring end and the anchoring head are located at the two ends of the rod body correspondingly, and the rod-sleeving device is arranged outside the rod body. The novel grouting anchoringrod with the steel sleeve rod is characterized in that guide rails are circumferentially and evenly distributed on the rod body; the rod-sleeving device is of a multi-section type cage-shaped structure, the rod body is sleeved with the rod-sleeving device, and the rod-sleeving device comprises a joint and a cage body; the joint portion is in slidably matched connection with the guide rails of therod body, and the cage body is hinged to the joint; and each section of the cage body adopts a two-section type hinging structure, and when the novel grouting anchoring rod is mounted in a drill holeand pressed in a fastened mode through the anchoring head, the cage body is compressed axially and expanded radially and makes contact and supports the drill hole wall. Through the mode of additionally arranging the steel sleeve rod, a hollow threaded steel anchoring rod is transformed, the steel sleeve rod is pressed by means of a nut, and the steel rod is supported open to make direct contact with a supported rock body so as to generate certain friction force, and the stability of the anchoring rod in the grouting process is ensured; and meanwhile after grouting, the anti-tensile-and-shearing capacity of the whole of a grouting material and the anchoring rod is improved, and the support strength of the anchoring rod is improved.

Description

technical field [0001] The patent of the present invention is a new type of grouting anchor rod, specifically related to a new type of grouting anchor rod with a steel sleeve rod, which is suitable for mining projects and rocks such as coal mine roadway support, metal mine roadway support and tunnel engineering support. Soil engineering support field. Background technique [0002] At present, the grouting bolts used in mining engineering and geotechnical engineering mainly use hollow bolt bodies, anchor heads, backing plates, nuts, etc. to realize the anchoring of rock masses in excavated spaces in roadways or tunnels. However, the problems existing in the hollow bolts of the existing grouted bolts are: 1) the strength of the hollow rod body is low; The rock protection produces supporting force, the cohesive force is small, and the anchorage strength is low. [0003] The main reason for the failure of grouting bolt support is that the grouting material is damaged by tensio...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcoming that the hollow bolt body of the grouting bolt is not in direct contact with the supported rock mass, and the grouting material of the grouting bolt is easily damaged by tension, which leads to the failure of the bolt, the invention provides a strip steel A New Type of Grouting Anchor Rod

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