Steel and ultra-high performance concrete light combined box type cover beam and manufacturing method thereof

Abstract

The invention discloses a steel and ultra-high performance concrete light combined box type cover beam and a manufacturing method thereof. The cover beam comprises a hollow box type body formed by pouring ultra-high performance concrete, a steel plate is pre-buried in the top face of the hollow box type body, and a plurality of shear connectors buried in the hollow box type body are arranged on the lower surface of the steel plate. The steel and ultra-high performance concrete light combined box type cover beam is of a fully-prefabricated structure. The manufacturing method comprises the steps of designing the structural form and dimension of the cover beam, manufacturing the steel plate with the shear connectors, carrying out pouring with an inversion prefabricating method, carrying out curing and disassembling a formwork. The steel and ultra-high performance concrete light combined box type cover beam has the advantages of being high in tensile property, light, convenient and fast to construct, easy to hoist, good in economy and the like.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a steel-ultra-high-performance concrete light-duty combined box-type cover beam and a manufacturing method thereof. Background technique [0002] Bridge piers are an important part of bridges. In the bridge pier, the cap beam is an important component that transmits the load of the superstructure to the substructure and foundation, and its design and construction are of great significance to a bridge. [0003] The acceleration of China's urbanization process has brought about a series of problems, among which land shortage and traffic congestion are prominent problems. Urban viaducts have been widely constructed as a way to make full use of urban space to solve this problem. With the construction of urban bridges, large cantilever cap beams can make full use of the space under the bridge, and its application is also increasing day by day. The commonly used cover bea...

AI Technical Summary

Problems solved by technology

[0004] For the construction of bridges, the cast-in-place concrete cover beams not only need to bind the complicated steel mesh on site, but also need to ensure the construction quality of the cast-in-place cover beams, which seriously affects the construction period

However, the prefabricated integral concrete cover beam is very heavy and requires extremely high hoisting equipment; the prefabricated and assembled cover beam also brings the construction problem that the prestress must be stretched in batches when the beam is erected, and there are also prestress loss problem

In addition, the tensile performance of ordinary concrete is low, and the cover beam is prone to tensile cracks under the long-term action of overloaded vehicles, etc.

After the cover beam is cracked, rainwater is easy to infiltrate and cause corrosion of the steel bars inside the concrete, which will lead to further cracking of the concrete and affect the bearing capacity of the cover beam and the transmission of load

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