Assembled bridge deck transverse joint using UHPC grouting material

Abstract

The invention provides an assembled bridge deck transverse joint using a UHPC grouting material. The transverse joint comprises two precast concrete bridge decks with tongue-and-grooves and the UHPC grouting material cast between the two precast concrete bridge decks in place. Each precast concrete bridge deck is internally provided with a steel frame formed by splicing a plurality of transverse steel bars and longitudinal steel bars. Each longitudinal steel bar is of a double-layer U-shaped steel bar structure with a U-shaped structure at the tongue-and-groove end, and U-shaped steel bars arearranged in the staggered mode at the tongue-and-groove position between the two precast concrete bridge decks. The two precast concrete bridge decks are connected into a whole by cast-in-place of the UHPC grouting material on the tongue-and-grooves arranged oppositely. The assembled bridge deck transverse joint using the UHPC grouting material enhances the durability and the stability of a wet joint of the bridge decks, a bottom mold is not needed during the cast-in-place of the UHPC, the precast bridge deck structure is simplified, and the long-term performance of a precast bridge deck system is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge structures, and in particular relates to a transverse joint of an assembled bridge deck using UHPC grouting material. Background technique [0002] Prefabricated bridge decks have many advantages, including significant advantages in terms of economy, constructability, and construction period. One of the most important advantages is that the drying shrinkage and temperature changes of the concrete have been completed when the bridge deck is erected. The resulting tensile stress. In addition to fast construction speed, prefabricated bridge decks are also of good quality, less diseased during use, reduced maintenance costs, and increased service life. Therefore, the application range of prefabricated bridge decks has gradually expanded to the field of new bridges. The key technology of prefabricated bridge deck structure is assembled structure. Assembled structure is the force transmission hub of pr...

AI Technical Summary

Problems solved by technology

[0004] Ordinary concrete is used as the wet joint grouting material in the traditional prefabricated bridge deck horizontal assembly, the cast-in-place wet joint needs a bottom form, and the welding or binding of the steel bars in the groove is complicated. Therefore, it is necessary to design a prefabricated bridge using UHPC grouting material Panel transverse joints, when UHPC is applied to the transverse joints of prefabricated bridge decks, through the high compressive strength of UHPC and good bonding performance with steel bars, the anchorage length of steel bars can be reduced, thereby reducing the width of wet joints

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