Bundle penetrating device for interior of post-tensioning method prestress corrugated pipe and construction method thereof

Abstract

The invention relates to a bundle penetrating device for the interior of a post-tensioning method prestress corrugated pipe and a construction method thereof. The ends of steel strands are fixed to awire hanging plate in the middle, the rear portion of the wire hanging plate is connected with a constraint ring, the front portion of the wire hanging plate is connected with a traction head, a pullring is arranged on the front end of the traction head, the bundle penetrating device is used for bundle penetrating of multiple steel strands in the post-tensioning method prestress corrugated pipe,one-time whole-bundle pipe passing of the steel strands can be achieved, constraint steel wires do not generate scattering and falling, the aim of smooth pipe passing can be achieved, the problem of bundle penetrating of the multiple steel strands can be solved, the pull ring can freely rotate relative to the bundle penetrating device body, and the turning force generated by a steel wire rope during pipe passing can be removed.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a post-tensioned prestressed bellows internal beam penetration device and a construction method thereof. Background technique [0002] Post-tensioning prestressing construction refers to making concrete components first, and leaving corresponding channels in the component body according to the position of prestressed tendons. After the concrete strength of the component reaches the specified strength, a hole is inserted into the reserved channel. One or several prestressed tendons are stretched, and the anchors are used to anchor the stretched prestressed tendons at the end of the component, and the pretensioned tension of the prestressed tendons is transmitted to the concrete by means of the anchorage at the end of the component, so that It generates precompressive stress; finally, grouting material is poured into the tunnel, so that the prestressed tendon and the ...

AI Technical Summary

Problems solved by technology

However, in the process of threading the bundles one by one, since the space in the corrugated pipe increases with the increase of the steel strands, the space for threading the bundles becomes smaller and smaller, and the friction force increases, which brings great difficulties to the operation of threading the bundles one by one. difficulty

The construction workers either bundle or weld the ends of several strands of steel strands and pass them through the bellows as a whole. However, during the process of threading the strands, the steel wires at the ends of the strands tend to bifurcate and rub against the inner wall of the bellows. It will cause damage to the bellows and increase the friction of the bundle, resulting in adverse consequences. The metal structure of the steel strand after high-temperature welding will also change, which will be detrimental to the mechanical properties of the steel strand

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