Construction method of pre-stressed anchor cable frame beam structure

Abstract

The invention discloses a construction method of a pre-stressed anchor cable frame beam structure, and relates to the technical field of slope support. The construction method comprises the following steps that 1, a side slope is excavated; 2, after the side slope is excavated, anchor holes are formed in the side slope, the hole opening positions of the anchor holes are marked at a node A and a node B, and the node A and the node B are both located in the center of the intersection position of a cross beam and a vertical beam in a prefabricated frame beam; 3, anchor holes are drilled, anchor cable bodies are installed, and then anchor hole grouting is conducted; 4, after anchor hole grouting is completed, a frame beam foundation trench is excavated, and a frame beam is constructed; 5, after frame beam construction is completed, the anchor cables are tensioned and locked; and 6, after the anchor cables are tensioned and locked, grout supplementing and anchor sealing are conducted on the anchor head. By the adoption of the scheme, the pre-stressed anchor cables can be combined with the frame beams, the frame beams play a role of anchorage piers, and due to the fact that the effective contact area of the frame beams and the slope surface is large, deformation of the slope body under the action of the anchor cables can be limited.

Description

technical field [0001] The invention relates to the technical field of slope support, in particular to a construction method of a prestressed anchor cable frame beam structure. Background technique [0002] The prestressed anchor cable is mainly composed of three parts: anchorage, free section and fastening head, and the grouting material is mainly pure cement slurry or cement mortar. Mainly by applying tension to the anchor cable to strengthen the rock (soil) mass to achieve a stable state or to improve the internal stress of the retaining structure. The anchor cable is a rod-shaped component that mainly bears tension. It fixes the steel strand in the deep stable formation through drilling and grouting, and generates prestress on the steel strand on the surface of the reinforcement, so as to achieve reinforcement. The purpose of stabilizing a solid or limiting its deformation. [0003] However, if the prestressed anchor cable is used alone for slope reinforcement, the exc...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that if the prestressed anchor cables are used alone for slope reinforcement, the excessive tension of the anchor cables will cause deformation or even destruction of the surface slope body, and excessive deformation of the slope body will lead to the prestressing of the anchor cables. The problem of loss is to provide a construction method for prestressed anchor cable frame beam structure. Using this scheme, the prestressed anchor cable can be combined with the frame beam, and the frame beam plays the role of anchor pier. Since the frame beam and the slope The effective contact area of ​​the slope is large, and the deformation of the slope under the action of the anchor cable can be limited

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