Chain type butt strap structure based on seamless bridge

Abstract

The invention discloses a chain type butt strap structure based on a seamless bridge. The chain type butt strap structure comprises a bridge abutment, a girder, a bridge deck and two or more butt straps, wherein the bridge abutment, the girder and the bridge deck form the main bridge section, and the butt straps are arranged at the end of the main bridge section in parallel and in the length direction of the main bridge section. Expansion joints are formed between the main bridge section and the butt strap closest to the main bridge section and between every two adjacent butt straps. The main bridge section and the butt strap closest to the main bridge section and every two adjacent butt straps are connected through dumbbell-shaped-structure steel bars, each dumbbell-shaped-structure steel bar is composed of a linear steel bar and two annular steel bars connected to the two ends of the linear steel bar, and the two annular steel bars are fixed inside the main bridge section and the butt strap or respectively fixed inside two butt straps. According to the invention, cracks in the joints of the butt straps at the rear part and the bridge abutment of the seamless bridge and pavement cracks in the joints of the tail ends of the butt straps and a roadbed can be eliminated, the stress performance of the butt straps of the seamless bridge can be effectively improved, and therefore the drive comfort of vehicles can be improved.

Description

technical field [0001] The invention relates to a chain-type slab structure based on a seamless bridge, which can be used for integral, semi-integral and extended deck bridges, and belongs to the technical field of bridges. Background technique [0002] The seamless bridge structure will move longitudinally under the action of alternating temperature, and the displacement of the superstructure will cause the displacement of the slab behind the abutment. Cause reflection cracks on the pavement. [0003] Under the action of self-weight and vertical traffic load, the subgrade will settle and compress, which will lead to the settlement of the board and the void at the bottom of the board, which will cause the damage of the board and the phenomenon of vehicle jumping at the bridge head, which will increase the impact of the car on the bridge. Further cause damage to the bridge structure, resulting in significant economic losses. Contents of the invention [0004] The object o...

AI Technical Summary

Problems solved by technology

[0002] The seamless bridge structure will move longitudinally under the action of alternating temperature, and the displacement of the superstructure will cause the displacement of the slab behind the abutment. Causing reflection cracks on pavement

[0003] Under the action of self-weight and vertical traffic load, the subgrade will settle and compress, which will lead to the settlement of the board and the void at the bottom of the board, which will cause the damage of the board and the phenomenon of vehicle jumping at the bridge head, which will increase the impact of the car on the bridge. Further cause damage to the bridge structure and cause major economic losses

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