Bridge bent cap segmented prefabricating, splicing and fixing method

Abstract

The invention relates to the technical field of bridge construction, in particular to a bridge bent cap segmented prefabricating, splicing and fixing method. The method is characterized in that by exerting counterforce balanced torque opposite to the collapsing direction of a prefabricated bent cap segment on one side of the prefabricated bent cap segment, the prefabricated bent cap segment is kept in a balanced state on a stand column. The method has the advantages that the effective construction with guaranteed installing quality is simply, safely and rapidly realized, stress is precise, andstability is high; the connection structure between the bent cap and a bank pier is simple, and applied tools are tools necessary for bridge construction and do not need to be purchased; operation issimple, and on-site operation is convenient; it is safe and reliable to applying a traditional construction process and method, and it is ensured that the prefabricated bent cap segment and the standcolumn are relatively fixed; concrete pouring of a wet joint is convenient; and the construction cost and especially the time cost are effectively reduced, and the requirements of shortening the construction cycle, accelerating the construction progress and especially conducting safe construction are met.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a segmental prefabricated, assembled and fixed method for bridge cover beams. Background technique [0002] Bridge prefabricated construction is a method widely used at present. Especially the urban bridge implementation. Due to the wide width of urban bridges, the form of double-supported piers and covered beams is relatively common. Thereby giving rise to the fact that the cap beam is wider. The longer cover beams are heavier and larger, generally exceeding 250 tons. For one-time lifting and installation, the requirements for equipment are higher, and the safety risk is greater. Therefore, it is generally installed in sections to reduce risks. In the segmental installation, from the design point of view, the humidification joints within the 2M range of the middle section of the cover beam are mostly cast-in-situ, so as to avoid the connection at the negative be...

AI Technical Summary

Problems solved by technology

[0003] Since the design is to cast-in-situ the humidified joint concrete within 2M of the middle section of the cover beam, it is inevitable to install a prefabricated single-section cover beam on a single column during the implementation process on the construction site.

In this form, due to the different lengths of the cantilever at the two ends, the change of the section form of the cover beam, with the column as the fulcrum, will inevitably produce an imbalance at the two ends.

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