Groove type hybrid girder three-way prestressed system structure and construction method

Abstract

The application discloses a slot type hybrid girder three-way prestress system structure and a construction method, and particularly relates to the technical field of building construction. The structure comprises a girder structure, a longitudinal prestress system, a transverse prestress system, a vertical prestress system and a node reinforcing structure. Different section combinations and prestress steel beam optimized arrangements are adopted to ensure uniform stress and integrity. The construction method adopts support cast-in-situ, stage prestress tension, pipe pressure grouting and whole-process linear and stress monitoring, combines with pre-camber calculation and pier bottom swivel technology to realize dynamic adjustment. On the technical effect, a closed-loop control system is established through real-time monitoring to ensure that the bridge linear and internal force are highly consistent with the design. The balance problem is solved by the cooperation of pre-swivel weighing test and support foot ball hinge control, and the construction safety is improved. The node reinforcing structure and the three-way prestress system are in cooperation to enhance the durability and minimize the interference to the existing line.

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