Integral hollow slab bridge structure based on ultra-high-performance concrete connection and construction method thereof

Abstract

The invention discloses an integral hollow slab bridge structure based on ultra-high-performance concrete connection and a construction method thereof. The bridge structure is formed by connecting atleast three prefabricated hollow slab bridges in the transverse direction of the bridges through at least two ultra-high-performance concrete joints and a plurality of ultra-high-performance concretetransverse stripes. Each ultra-high-performance concrete joint comprises a hinge joint between every two hollow slab bridges and ultra-high-performance concrete longitudinal stripes. The hinge joint forms a basic frame through two prefabricated hollow slab bridge web plates, embedded transverse connecting steel bars extending out of the web plates, longitudinal steel bars and hoop bars and is filled with ultra-high-performance concrete. The ultra-high-performance concrete longitudinal stripes include steel bar frameworks formed by prefabricated bridge top slab extending steel bars, longitudinal steel bars and transverse steel bars, and the ultra-high-performance concrete longitudinal stripes and the hinge joints are filled with ultra-high-performance concrete simultaneously. The integral hollow slab bridge structure is good in stress performance, good in durability and remarkable in full-life economical benefit, and construction steps can be executed by adopting a traditional construction device and process and are simple, quick and convenient.

Description

technical field [0001] The present invention relates to the technical field of bridge engineering. Specifically, it provides an integrated hollow slab bridge structure based on ultra-high performance concrete connections and a construction method thereof. Hollow-core slab seams. Background technique [0002] Prefabricated hollow slab bridges generally suffer from hinge joint shedding, water seepage, low horizontal integrity of hollow slabs, and bridge deck pavement damage, cracking, and shifting. There are too few horizontally connected steel bars, and ordinary concrete has low strength and poor durability. In addition, the design and calculation of the hollow slab is based on the hinged plate theory, which assumes that the ideal "hinge" only bears the shear force and ignores its tension; in fact, the hinge of the hollow slab is subjected to the longitudinal bending moment around the beam in addition to the shear force. The transverse bending moment when the hollow slabs w...

AI Technical Summary

Problems solved by technology

[0002] Prefabricated hollow slab bridges generally suffer from hinge joint shedding, water seepage, low horizontal integrity of hollow slabs, and bridge deck pavement damage, cracking, and shifting. There are too few horizontally connected steel bars, and ordinary concrete has low strength and poor durability

In addition, the design and calculation of the hollow slab is based on the hinged plate theory, which assumes that the ideal "hinge" only bears the shear force and ignores its tension; in fact, the hinge of the hollow slab is subjected to the longitudinal bending moment around the beam in addition to the shear force. The transverse bending moment when the hollow slabs work together; there is a deviation between the calculation theory of the hollow slab and the actual working state of the hinge joint

In the prior art, structural measures such as optimizing the shape of the hinge joint and pre-embedding the steel plate on the top of the slab are generally used to improve, but due to the limitations of the material properties of the concrete itself and the structure of the hollow slab bridge itself, the diseases caused by the hinge joint have not been fundamentally resolved

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