Pull-pressure dispersed protecting anchor cable and its construction method

Abstract

A tension-compression dispersed protective anchor cable and its construction method. The anchor cable is composed of an outer anchor head, a free section, and an anchor section. Two or more bearing bodies are distributed on the anchor section. The steel strand is composed of a bearing plate, an elastic gasket, and an extrusion sleeve that are sequentially placed on the steel strand. The number of steel strands passing through each bearing plate is different, and the end of each steel strand is stripped beyond the bearing plate. For bonded steel strands, the construction method includes drilling holes, making and installing anchor cables, grouting, tensioning and locking and other construction procedures. This type of anchoring has uniform stress distribution, good anchoring and anti-corrosion effects, simple anchor cable structure, The advantages of convenient construction.

Description

technical field [0001] The invention relates to an anchor cable for rock and soil anchoring and a construction method. Background technique [0002] At present, in geotechnical anchoring projects, the tension-type ground anchor construction method is mostly used, and the tension-concentrated anchor cable is widely used. Due to the low tensile strength of the slurry, when it is stretched, the slurry will appear tensile stress at the upper interface of the anchorage section. Concentrated, under the action of excessive tensile stress, cracks will appear in the grouting material in this part, so that the slurry will lose the anti-corrosion effect on the anchor cable. Destroy, and gradually move down until the anchorage fails completely. [0003] The pressure-concentrated anchor cables and construction methods used in small quantities now take advantage of the advantage that the compressive strength of the slurry is higher than the tensile strength, but the anc...

AI Technical Summary

Problems solved by technology

[0004] The above two types of anchor cables have the problems of excessive concentration and uneven distribution of stress, which can easily cause the damage of the slurry, so they cannot achieve the purpose of permanent protection and shorten the length of the anchor cables.

[0005] A pressure-dispersing anchoring method and a pressure-dispersing anchor cable recently developed in Japan, although some improvements have been made to the problem of stress concentration, are not ideal, and the structure is complex and the cost is high.

Images