External prestress steel structure steering device of continuous box girder bridge

Abstract

The invention discloses an external prestressed steel structure steering device of a continuous box girder bridge, which comprises a first steel structure steel pipe and a second steel structure steel pipe, one end of the first steel structure steel pipe is fixedly provided with a steering structure, and the second steel structure steel pipe is fixedly provided with another group of steering structures. The first steel structure steel pipe and the second steel structure steel pipe are connected through two sets of steering structures, and each steering structure comprises a U-shaped block fixed to the first steel structure steel pipe or the second steel structure steel pipe, a through hole formed in the inner wall of the U-shaped block, inserting rods rotationally connected into the through hole and a roller column with the inserting rods fixed to the two ends. A fixing assembly is arranged on the outer wall of the steering structure, and a maintenance structure is arranged on the outer wall of the steering structure. And through the arrangement of the fixing assembly, a worker can fix and limit the roller columns on the two sets of steering structures after steering through the fixing assembly, and it is guaranteed that the roller columns cannot rotate easily after steering.

Description

technical field [0001] The invention relates to the technical field of steel structure steering, in particular to an externally prestressed steel structure steering device of a continuous box girder bridge. Background technique [0002] With the rapid development of my country's modern transportation, large-span and high-pier bridges have become the key requirements for the development and construction of bridges today. The external prestressed active reinforcement technology has the advantages of less weight increase, simple construction technology, short construction period, less interference with traffic, and no traffic jams. The outstanding features and advantages of affecting the clearance under the bridge, being easy to replace, and ensuring the normal operation of traffic during the construction process make the bridge strengthened by external prestressing. Continuous box girder bridge: a girder bridge composed of two or more continuous box girders. [0003] However, ...

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Problems solved by technology

[0003] But the existing externally prestressed steel structure steering device of continuous box girder bridge still has some disadvantages, the traditional externally prestressed steel structure steering device of continuous box girder bridge Most of them use turning blocks, and the prestressed tendons of external prestressed concrete structures need to change their direction through turning blocks when necessary, so as to form prestressed curved reinforcement, but the turning blocks can only rotate at a narrow angle, and the rotation firmness is poor. Long-term use is easy to cause loosening, so we propose an externally prestressed steel structure steering device for continuous box girder bridges

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