Steel strand bundle-weaving and crossing construction method

Abstract

The invention discloses a steel strand bundle-weaving and crossing construction method, comprising the following steps of: intercepting a steel strand; peeling and cutting an outer-layer steel wire at one end of the steel strand; drawing the steel strand to pass through a through hole corresponding to a duplicating wire combing board; enabling the central steel wire to pass through the duplicating wire combing board according to the position of the steel strand in the duplicating wire combing board; installing the end of the central steel wire, passing through the duplicating wire combing board, in a cross guiding base; coating the end of the steel strand and the part of the steel strand with the out-layer steel wire peeled; introducing a cross guiding head to pass through a corrugated pipe or a sheath in a pre-stress member to be fixed with the cross guiding base; drawing the steel strand to enter the corrugated pipe or sheath in the pre-stress member in a guiding mode; and cutting off the central steel wire exposing from one end of the steel strand, together with the cross guiding base. The invention can effectively avoid uneven stress of the steel strand during tensioning when the steel strands are wound to each other caused by improper bundle crossing, improve the construction quality of a pre-stress structure and save the working time.

Description

technical field [0001] The invention relates to a building construction method, in particular to a method for braiding and threading steel strands when tensioning a prestressed anchor. Background technique [0002] Prestressed anchors are often used in buildings such as bridges and highways. For example, Chinese utility model patent 200410022950.0 discloses a secondary tensioned prestressed anchor, which consists of a backing plate, a backing nut, an anchor ring, and a clip. One end of the backing plate is fixed in the concrete member, the support nut is stacked on the other end of the backing plate, the anchor ring is installed on the axis of the support nut, the anchor ring has a tapered hole in the axial direction, and the clip is installed in the anchor ring hole. [0003] Steel strands are used in most anchorages. It is one of the most important links to pass the steel strands into the bellows or sheath when the anchorage is installed. The existing steel strands general...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, multiple steel strands tend to be entangled or crossed, which not only increases the difficulty of sheathing, but also causes deviations in prestress data when prestressing the steel strands, affecting the use effect.

The uneven stress on the steel strands in the same bundle will affect their service life. If the stress is large, they will be fatigued and fractured early. After a chain reaction, the prestress will be lost, and the beam body will deflect and collapse.

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