Concrete filled steel tubular temporary consolidation system of cast-in-cantilever beam

Abstract

The invention relates to a concrete filled steel tubular temporary consolidation system of a cast-in-cantilever beam. The concrete filled steel tubular temporary consolidation system of the cast-in-cantilever beam comprises a support steel tube, H-shaped steel, concrete and a finish rolling deformed steel bar, wherein the support steel tube is connected with the pre-embedded finish rolling deformed steel bar through a flange, the concrete is poured into the support steel tube, one end of the H-shaped steel penetrates through the support steel tube and is welded with a pier stub pier top embedded part and serves as a wall sustaining measure and a box beam initial segment cast-in-situ support, and the support steel tube and the box beam are stretched and connected into a consolidation system through the finish rolling deformed steel bar. The concrete filled steel tubular temporary consolidation system of the cast-in-cantilever beam is a temporary consolidation system which is used for symmetrically pouring of a continuous box beam cantilever and bearing unbalanced moment in a construction process, is especially suitable for such adverse conditions as large box beam span, heavy hanging basket and other temporary load, difficult control of deformation and large unbalanced bending moment.

Description

technical field [0001] The invention relates to a temporary consolidation system for the pier top section in the symmetrical cantilever construction of the continuous box girder hanging basket of the bridge superstructure. Background technique [0002] The cantilever casting method is a construction method in which working platforms are set on both sides of the pier, and the cement concrete beam is cantilevered section by section to the mid-span in a balanced manner, and prestressed section by section is applied. The main equipment is a pair of walking baskets. The hanging baskets move on the beams that have been tensioned and anchored and integrated with the pier body. Binding steel bars, forming forms, pouring concrete, and applying prestress are all carried out on them. After the construction of this section is completed, the hanging baskets move forward one section symmetrically to carry out the construction of the next pair of beam sections, and proceed sequentially unt...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of large span of cantilever pouring box girder, heavy hanging basket and other temporary loads, difficult deformation control, and large unbalanced bending moment, and provides a temporary consolidation system for cantilever pouring beam concrete filled steel tube. The steel pipe is anchored to the box girder and cap at the initial section by rolling the rebar, so that the unbalanced force generated by the T-structure cantilever during the construction of each section is transmitted to the cap through the steel concrete column and the finished rolled rebar, and finally reaches a balance status

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