High-grade prestressed bolt cable of compact rope for geotechnical engineering

Abstract

The present invention belongs to the field of geotechnical engineering. The anchor cable includes three sections, inner anchoring section, freely tensing section and outer anchoring section, and the freely tensing section includes several pieces of high-strength low-laxation cold drawn steel wires, rather than traditional steel strand, arranged along the anchor cable to form stable or notched hexagonal cross section. The steel wires of the anchor cable are twisted in great pitches and small twist angle and tied and settled with composite wrapping belt and two outer layers of hot extruded protective high density polyethylene pipe. The present invention has perfect antirust measures, prestress applied via drawing steel wires and balance stress, and may be freely tensed. The pull rod and conic pipe in the inner anchoring section have antisticking layer coated, and the cement cylinder has pressure applied and with properly dispersed pressure.

Description

technical field [0001] The invention relates to a geotechnical engineering anchor cable, in particular to a geotechnical engineering dense type cable body prestressed high-grade anchor cable, which belongs to the field of geotechnical engineering. Background technique [0002] Prestressed anchor cable is an important reinforcement method in geotechnical engineering. Geotechnical engineering anchor cables at home and abroad can be divided into two categories according to their service objects and service life: one is used for temporary support for a short time, and the other is used as an integral part of engineering structures for permanent support structure. The latter has multiple free tension and permanent anti-corrosion requirements for the anchor cable. Although the basic structure of the former is basically the same as that of the permanent anchor cable, since it does not need multiple tensions and short-term use, anti-corrosion measures and other aspects can be simp...

AI Technical Summary

Problems solved by technology

This non-compact cable body structure composed of steel strands inevitably has the following disadvantages: (1) This type of geotechnical engineering anchor cable cannot be produced by the factory as a terminal product, and a temporary assembly workshop must be set up at the construction site

Therefore, it is difficult to ensure that each geotechnical prestressed anchor cable used in the project is of high quality

(2) The load on the anchor cable should be evenly shared by each steel strand. In order to ensure that each steel strand is evenly stressed, the steel strands must be drawn one by one when applying prestress, and then drawn synchronously as a whole. Complicated installation and debugging process

(3) With bellows, it is difficult to find and check whether there is any damage during the installation process. Once there is damage, it is difficult to guarantee permanent anti-corrosion

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