Blocking-type bridge deck slab wet joint connecting form

Abstract

The invention provides a blocking-type bridge deck slab wet joint connecting form. A wet joint structure comprises a plurality of prefabricated concrete bridge deck slabs erected on longitudinal beams; a step-shaped wet joint in the direction along a bridge is formed between every two adjacent prefabricated concrete bridge deck slabs in a spaced mode; and the sides, close to the wet joints, of theprefabricated concrete bridge deck slabs are provided with upper-layer pre-embedded steel bars and lower-layer pre-embedded steel bars which all extend to the outer sides of the prefabricated concrete bridge deck slabs; super-strength engineered cementitious composites (ECC) are poured into the wet joints in a cast-in-place mode; and the every two adjacent prefabricated concrete bridge deck slabsare connected into a whole through adjacent wet joint concrete. According to the wet joint structure, the ability of transmitting shear force and bending moment of the wet joints is improved, and generating and expansion of cracks at the wet joints can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a bridge deck wet joint structure. Background technique [0002] Pre-bridge construction speed, especially the time for bridge replacement and bridge repair, has become a key issue in reducing the time of interruption to traffic and trade. A promising system for rapid construction is the prefabricated bridge. This type of bridge is prefabricated in the factory, and transported to the construction site to connect the prefabricated bridge decks through wet joints, and the prefabricated bridge decks are transmitted through wet joints. [0003] The prefabricated bridge deck system avoids the scaffolding, formwork erection and concrete pouring and maintenance on the construction site, greatly reduces the construction time and improves the construction speed. Moreover, since the prefabricated bridge deck is prefabricated in the factory, the pouring and curing conditions are...

AI Technical Summary

Problems solved by technology

The wet joint connection construction between the prefabricated bridge decks currently used cannot effectively prevent the generation and propagation of cracks

In addition, in order to ensure the strength of the commonly used wet joints with straight bar lap or welded structures, the width of the wet joints must be increased, which will increase the amount of wet joint grouting concrete and steel bars and increase the construction cost. The larger the width of the joint also slows down the construction speed

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