Concrete continuous girder cantilever construction load balance adjusting device and method

Abstract

The invention relates to the field of continuous girder cantilever construction, in particular to a concrete continuous girder cantilever construction load balance adjusting device and method. Temporary buttresses are arranged at the position, located at the two sides of a girder pier body, of a girder bearing platform, the upper end of the girder pier body bears a girder body, and finish rollingsteel bars are embedded at the positions, located at the two sides of the girder bearing platform, between the girder bearing platform and the girder body. The adjusting method includes the steps of pre-embedding the finish rolling steel bars, constructing the continuous girder main girder pier body, setting the temporary buttresses and putting up a temporary support, pouring concrete to completegirder body construction, fixedly connecting the girder body and the girder pier body to form a T-structure form and conducing full-bridge closure. The concrete continuous girder cantilever construction load balance adjusting device and method are provided.

Description

technical field [0001] The invention relates to the field of cantilever construction of continuous beams, in particular to a load balance adjustment device and an adjustment method for cantilever pouring construction of continuous beams of concrete. Background technique [0002] Since the continuous beam cantilever construction method was used by the former West Germany in the 1960s, it has developed into an effective construction method for building large and medium-span bridges. Due to the high technical content of cantilever construction, less investment in equipment and materials, convenient construction, and strong ability to cross unfavorable terrain, it is increasingly used in long-span bridges. The cantilever construction method refers to the construction method of the beam part starting from the pier in the middle of the bridge, gradually extending it in a symmetrical manner, and hanging the beam section until it is closed. The basic procedure of the cantilever pou...

AI Technical Summary

Problems solved by technology

In the actual cantilever construction process, in addition to the fact that the concrete pouring progress cannot be kept completely synchronized, there are many reasons for unbalanced loads at both ends of the cantilever, such as: loads generated by crowds during the construction process, loads generated by construction machinery and materials, hanging baskets The unbalanced loads generated by these factors are difficult to quantify accurately, that is to say, how big these unbalanced loads are, and the T structure formed by the 0# block has produced How big is the bending moment, and whether the generated bending moment exceeds the design allowable value? It is difficult for us to make an accurate judgment during the construction process, so it is impossible to guarantee that the continuous beam will always maintain a safe balance state during the cantilever construction process.

If the existence of these factors is ignored, major safety accidents may occur

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