Continuous beam bridge closure construction method

Abstract

A continuous beam bridge closure construction method comprises the following steps of designing a beam bridge, and obtaining design parameters; carrying out load simulation on the beam bridge; designing closure schemes; calculating simulation load parameters of each closure scheme; judging whether the simulation load parameters in each closure scheme exceed the limit range of the design parametersor not; if the simulation load parameters of each closure scheme exceed the limit range, returning to the step of designing the girder bridge; if the simulation load parameters of at least one closure scheme does not exceed the limit range, abandoning the closure schemes of which the simulation load parameters exceed the limit range, and reserving the closure scheme of which the simulated load parameters do not exceed the limit range; selecting a closure scheme in the reserved closure schemes according to the simulation load parameters; and conducting closure construction according to the selected closure scheme. Compared with the prior art, the continuous beam bridge closure construction method has the advantages that a reasonable closure scheme is selected according to needs, the structural stress requirement is met, economic benefits can be increased, and construction organization and production are facilitated.

Description

technical field [0001] The invention relates to the field of girder bridge engineering, in particular to a construction method for closing a continuous girder bridge. Background technique [0002] The girder bridge is an important building in today's society, and the span of space can be realized by setting the girder bridge. In places with large spans, it is often necessary to set up multiple supports to support the bridge body of the girder bridge. A girder bridge that spans multiple supports continuously is called a continuous girder bridge. Continuous girder bridges are generally constructed using the cantilever construction method. During cantilever construction, set up a working platform on the support and cantilever pour or assemble beam sections one by one until the bridge span structure is closed. [0003] For example, see figure 1 , Patent Application No. 201920825158.0 discloses a highly stable hanging basket cantilever cast-in-place support device, including ...

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Problems solved by technology

[0004] It can be seen that the cantilever construction method of continuous girder bridges in the prior art mainly uses construction hanging baskets, so in the construction process, in addition to the weight of the beam bridge itself, loads such as hanging baskets and supports affect the quality of the closure

Moreover, in the process of closing the construction, because the cantilever end is affected by external factors such as sunshine and cold air, as well as internal factors such as self-weight, concrete shrinkage and creep, and prestress, there will be a relative height difference, especially for continuous beam bridges with long cantilevers. , even small changes in factors will affect the quality of the closure, so choosing a closure plan reasonably and constructing accordingly will have a significant impact on the structural force and linear control, which in turn will affect the quality of the girder bridge

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