Construction method of industrialized short-line prefabrication and assembly of urban overpass

Abstract

The invention discloses an urban overpass industrial short-line prefabricating and splicing construction method. The method includes the first step of calculating the deflection aggregate value in each construction stage by considering the structure dead load of an overpass, the construction live load of the over pass and the load, based on the concrete shrinkage, creep, prestressed tendon relaxation and wind load influences, of the overpass, and dividing a whole box girder into multiple sections with the deflection aggregate value in the construction complete stage as the camber during cast-in-place beam construction; the sixth step of symmetrically splicing the box girder bodies in pairs in a suspended mode after the box girder bodies poured block by block are set finally and stacked and stored for a certain time period, and finally forming a multi-span continuous girder bridge. By means of the urban overpass industrial short-line prefabricating and splicing construction method, social resources are reasonably utilized, the input amount of steel and mechanical devices for the support system is lowered, construction cost is reduced, the land requisition and demolishing area is reduced, and the construction cycle is shortened.

Description

technical field [0001] The invention relates to a construction method, in particular to an industrialized short-line prefabricated and assembled construction method for an urban overpass. Background technique [0002] During the construction of urban overpasses, the cast-in-place method of supports is mainly used. This method of support construction has a long construction period, which is not conducive to factory-scale production, is not conducive to project quality control, and is not conducive to reducing the impact of bridge construction on the urban environment and existing traffic. During the construction process, the traffic flow of the existing roads in the city cannot be guaranteed, and the construction site will cause great damage to the surrounding environment, which will easily cause inconvenience for social vehicles and residents along the road. In addition, the traditional cast-in-place method of support cannot make reasonable use of social resources, increases...

AI Technical Summary

Problems solved by technology

[0002] During the construction of urban overpasses, the cast-in-place method of supports is mainly used. This method of support construction has a long construction period, which is not conducive to factory-scale production, is not conducive to project quality control, and is not conducive to reducing the impact of bridge construction on the urban environment and existing traffic. During the construction process, the smooth traffic of the existing roads in the city cannot be guaranteed, and the construction site will cause great damage to the surrounding environment, which will easily cause inconvenience for social vehicles and residents along the road.

In addition, the traditional cast-in-place method of support cannot make reasonable use of social resources, increases the amount of steel used in the support system and the input of mechanical equipment, increases the cost of the project, increases the area of ​​land acquisition and demolition, and increases the cost, which is not in line with energy conservation and environmental protection. the rules

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