Wet joint connection structure for fully prefabricated bridges

Abstract

The invention discloses a wet connection section connection structure used between fully prefabricated assembled bridge girders. The wet connection section connection structure comprises a prefabricated lower layer bridge slab with a certain thickness, wherein a convex rebar structure is arranged at the upper edge of the prefabricated lower layer bridge slab. The prefabricated lower layer bridge slab is arranged on a wet connection section of the two prefabricated girders, a concave structure is arranged on the two prefabricated girders on the wet connection section side, and the convex rebar structure extends into the concave structure. The wet connection section connection structure does not need to use a hanger formwork and can ensure the force bearing requirement of the bridge girder structure.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a wet joint section connection structure used for fully prefabricated assembled bridges. Background technique [0002] At present, for bridges assembled from multiple prefabricated small box girders, prefabricated T girders or prefabricated slab girders, longitudinal wet joints must be connected after installation. At present, there are two commonly used connection methods. The first one is at the joint of two prefabricated beams 1, such as figure 1 The suspended wooden formwork 2 shown is poured on site with concrete 3 to complete the connection of the wet joints. However, with this joint method, a suspended formwork needs to be set up under the wet joint during construction, and a bracket needs to be set to remove the suspended formwork after the construction is completed. It requires more manpower and material resources, high labor intensity and low work efficien...

AI Technical Summary

Problems solved by technology

Although this wet-joint connection structure eliminates the workload caused by the installation and removal of the hanging formwork, as well as the inconvenience caused by the installation and removal process of the hanging formwork to the ground traffic, however, due to the prefabrication of the bottom formwork in the two beams The bottom edge of the bridge deck is not connected at the splicing position, and there is a certain gap 2 in between, which leads to a decrease in the effective height of the bridge deck structure at the joint position, resulting in the unfavorable position of the bridge structure at the joint

In order to meet the stress requirements of the bridge structure, it is necessary to increase the thickness of the bridge deck or increase the configuration of steel bars in the bridge deck, which increases the construction cost

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