Prefabricated contour box girder of deep river crossing bridge

Through prefabricated contoured box girder technology, the problem of excessive construction period in the construction of deep river bridges was solved, and multiple box girder profiles were built at the same time and concrete pouring was carried out, which significantly shortened the construction period.

CN222908509UActive Publication Date: 2025-05-27SICHUAN JIAOTOU CONSTR ENG CO LTD +1
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Patent Information

Application Number
CN202421841187.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2025-05-27
Estimated Expiration
2034-07-31

AI Technical Summary

Technical Problem

During the construction of a deep river bridge, the cast-in-place method requires waiting for concrete to be formed and cured, resulting in too long construction period.

Method used

Prefabricated contoured box beam technology is adopted, and the prefabricated combination of the lower main beam and the upper main beam is combined with the connection of the tie rod and reinforcement ribs to form the box beam profile, and concrete pouring is carried out on the outline to shorten the construction period.

Benefits of technology

Through prefabricated contour box beam technology, multiple box beam profiles can be built at the same time, and concrete pouring is carried out after multiple constructions on one side, significantly shortening the construction period and avoiding sequential waiting and long construction periods under cast-in-place method.

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Abstract

The utility model provides a prefabricated contour box girder of a deep river-crossing bridge, relates to the technical field of bridge building, and solves the problem that the construction period is too long due to the fact that cast-in-place needs to wait for concrete forming and curing in sequence when the box girder of the river-crossing bridge is built. An upper main beam is arranged above the lower main beams, opposite pull rods are arranged between the lower main beams and the upper main beam, the top of the upper main beam is connected with a top plate cross frame, a placing block is arranged at the bottom of the opposite side of the lower main beams, a cast-in-place bottom plate is connected between the lower main beams through the placing block, a correction assembly is arranged at the attaching position of the placing block and the cast-in-place bottom plate, and the correction assembly slides along an inclined plane. A plurality of box girder contours formed by the prefabricated lower girders and the upper girders in the device can be constructed at the same time, then concrete pouring and filling are conducted on the contours at the same time, it is not needed to wait for cast-in-situ completion of the box girders in sequence when a bridge is constructed, and the construction period is shortened.
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