Constructing method for threading pre-stress structure steel strands

Abstract

The invention discloses a constructing method for threading pre-stress structure steel strands in a corrugated pipe. In the procedure of manufacturing each bundle of the steel strands, a dragging end of each steel strand is processed; a steel wire is exposed into a certain length relative to the other steel wires; all steel strands are bound to form a bundle; the steel wire exposed out of each steel strand is fixed with a threading anchor fastener; the front end of the threading anchor fastener is connected with a dragging steel wire rope of a dragging device; the back end of the threading anchor fastener is connected with the steel wire exposed out of the steel strand; the dragging steel wire rope drives the steel strand bundle to move in the corrugated pipe so as to pass through the pipe through the threading anchor fastener. The constructing method does not use an end head welding method; the steel strand bundle does not have the thermal stress action; and the end head is not cut again. In addition, the steel strand is good in flexibility and suitable for the linear changing of the pipeline; and the constructing speed is improved by threading the whole steel bundle, and the threading anchor fastener can be reused, therefore, the construction cost is reduced, and the quality and the building construction period are ensured.

Description

Technical field [0001] The present invention involves a construction method of a prestressed structure for building, especially the construction method of wearing steel twisted beams in the prestressed structural ripple. [0002] Background technique [0003] The prestressed structure (such as pre -staminated steel box beams, etc.) is widely used in the construction field, such as bridges, urban viaducts, large -span structures, and special structures, which are the main force components.During the construction process, it is its quality control point to pass the steel stranded beam through the ripple tube. Of course, it is also a difficult point in construction. In the existing technology, the steel wire rope (or steel twisted) of the traction device is usually usedMethods, use a slightly staggered way to spacing, welding the front end of the steel twisted wire required by the steel twisted wire to form a shuttle shape. figure 1 It can be seen from the figure that from the front...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the construction method of welding the front ends of the steel bars together in the prior art, and then passing them through the bellows with a traction device. Poor performance and yield, scratching the bellows, may cause serious quality accidents, etc., and the process of beam threading by a professional beam threading machine is a single thread thread, which is greatly affected by the construction speed and scope of application. Insufficiency of limitations, provides a construction method in which the steel strands in the prestressed structure pass through the bellows

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