Construction method for integrally forming large cast-in-place thin-wall high pier through stiff skeleton reinforcement cage

Abstract

The invention relates to a construction method for integrally forming a large cast-in-place thin-wall high pier through a stiff skeleton reinforcement cage. The construction method includes the main construction steps of (1) stiff skeleton erection, (2) locating frame installation, (3) locating frame and stiff skeleton butt joint, (4) reinforcing steel bar binding and forming, (5) lifting frame installation, (6) overall lifting and butt joint, (7) auxiliary facility disassembly, and (8) formwork construction. A structure related to the construction method has the beneficial effects that binding is convenient; the construction efficiency is high; a stiff skeleton can be partially disassembled and recycled; accurate localization of reinforcing steel bars is guaranteed and a double-layer locating frame is easy to disassemble; the reinforcing steel bars can be integrally formed and lifted for butt joint in a segmental manner; reinforcing steel bar binding time is shortened; the upper section and lower section concrete pouring period difference is reduced; and the economic and technological benefits are good.

Description

technical field [0001] The invention relates to a rigid positioning skeleton system for installing a cast-in-place thin-walled high pier steel cage, in particular to a construction method for integrally forming a large cast-in-situ thin-walled high pier with a rigid skeleton steel cage. Background technique [0002] In bridge engineering, high pier construction is an extremely important part. In order to ensure the construction quality and safety of high pier construction, the use of stiff skeleton for construction is the most commonly used method. The rigid skeleton plays an important role in the fixation of steel bars and the consolidation of formwork. Specifically, after the rigid skeleton is added, due to the high rigidity of the rigid skeleton, the steel bars and formwork can be fixed on the rigid skeleton, thereby preventing the overall tilting of the steel skeleton and the occurrence of formwork collapse accidents. The safety belt is fixed by the rigid frame, which p...

AI Technical Summary

Problems solved by technology

However, the traditional rigid frame is difficult to control the positioning of the main reinforcement of the high pier, so that the accuracy of the binding of the main reinforcement of the high pier is low

Moreover, the traditional rigid frame needs to invest a large amount of steel to ensure the overall stability of the steel cage during hoisting, and the cost of steel is large; the traditional rigid frame positioning device usually uses permanent positioning steel plates, and the cost is relatively high; and the steel joints and positioning holes The edge constraints affect the removal of the positioning frame. During the binding installation and concrete pouring process, the vertical steel bars will inevitably move or tilt, which will cause the upper joint and the edge of the positioning hole to be tightly squeezed, making it difficult to remove the positioning frame.

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