Box-type bridge prestressed tendon accurate alignment installation device and installation method thereof

Abstract

The invention discloses a box-type bridge prestressed tendon accurate alignment installation device and an installation method thereof, and relates to the technical field of bridge construction. The box-type bridge prestressed tendon accurate alignment installation device comprises a door-type frame, an upper end cross beam, a threading device, a wire conduit and a conical wire leading head, and the cross beam and an inclined support beam can improve the strength of the door-type frame; a sling chain lifting point is arranged on one side, close to the portal frame, of the upper end cross beam,so that a lifter is convenient to mount, and the threader is adjusted during threading; flanges are welded to the two ends of the wire conduit, and the threader, the wire conduit and the preformed hole are connected through the flanges to ensure centering of the threader, the wire conduit and the preformed hole; the operation hole and an observation hole are convenient for observing the strand pulling operation process and timely adjusting, so that the strand pulling efficiency is improved; and the device can be repeatedly used for multiple times and can be operated by only 2-3 persons, so that the mounting period is greatly shortened, and the mounting cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of bridge construction, more specifically, the present invention relates to a box-type bridge prestressed tendon precision alignment installation device and an installation method thereof. Background technique [0002] The traditional prestressed steel beam threading method adopts manual or winch traction. When threading the beam, a guide rope is inserted into the pipeline, and the steel wire is led out by the guide rope, and the other end of the steel wire is connected with the steel beam tractor. beam pulled out. This construction method mainly has the following problems: 1. The process is cumbersome: each prestressed steel bar needs to repeat the process of threading the guide cable, threading the steel wire, and pulling out the prestressed steel bar. The operation is cumbersome and requires many people to work together, and the efficiency is low , high cost; 2. High rework rate: the guide rope a...

AI Technical Summary

Problems solved by technology

This construction method mainly has the following problems: 1. The process is cumbersome: each prestressed steel bar needs to repeat the process of threading the guide cable, threading the steel wire, and pulling out the prestressed steel bar. The operation is cumbersome and requires many people to work together, and the efficiency is low , high cost; 2. High rework rate: the guide rope and steel wire are easy to break and untie during the traction process, resulting in rework during the traction process; 3. Occupying the reserved space in the hole: the steel wire itself and the binding joint need to occupy a lot of space in the pipe. In the case of many prestressed steel bars in the pipe, it takes up a lot of space in the pipe and affects the installation work, which greatly increases the difficulty and efficiency of installation

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