Box girder construction method through using multiple hold hoops and trusses for supporting Bailey truss based on large-span box girder

Abstract

The invention relates to a box girder construction method through using multiple hold hoops and trusses for supporting a Bailey truss based on a large-span box girder. The method is characterized by comprising the following steps of 1, installing hold hoops; 2, installing a lifting system; 3, installing a supporting system; 4, installing temporary support seats; 5, carrying out box girder concretepouring through forms; 6, removing the temporary support seats and replacing permanent support seats; and 7, retracting jacks, sequentially removing the forms, the supporting system, the lifting system and the hold hoops. The method is applied to cast-in-situ construction of the large-span box girder and has the advantages that large-area foundation treatment and foundation construction are not needed, construction cost is reduced while construction efficiency is improved, and meanwhile the safety is improved, and remarkable economic and social benefits can be achieved.

Description

technical field [0001] The invention relates to the construction of a cast-in-place large-span box girder, in particular to a construction method for a box girder based on a multi-hoop truss supporting a Bailey bracket of a large-span box girder. Background technique [0002] In the cast-in-place construction of large-span box girders, site leveling and foundation treatment are required for erecting full hall supports, and concrete expansion foundations or pile cap foundations are required for erecting steel pipe supports. This method is more difficult and expensive to construct. At present, the more effective method is to use hoop + Bailey frame to form a bracket structure, and lay formwork on it for box girder concrete pouring. However, due to the lack of supporting nodes, it is only suitable for the construction of small cast-in-place box girders with small spans and low heights. , it is difficult to meet the construction requirements of large-section cast-in-place box g...

AI Technical Summary

Problems solved by technology

[0002] In the cast-in-place construction of large-span box girders, site leveling and foundation treatment are required for erecting the full hall supports, and concrete expansion foundations or pile cap foundations are required for erecting steel pipe supports. This method is difficult to construct and expensive

At present, the more effective method is to use hoop + Bailey frame to form a bracket structure, and lay formwork on it for box girder concrete pouring. However, due to the lack of supporting nodes, it is only suitable for the construction of small cast-in-place box girders with small spans and low heights. , it is difficult to meet the construction requirements of large-section cast-in-place box girders with "large span, high height, and large load"

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