What is the hinge joint in bridge structure?

Hinge joint refers to the post-pouring concrete (pouring joint) between precast slab beams in bridge engineering, which connects two slab beams and is carried out after slab beams are installed but before deck pavement construction.

Due to the increase of load grade, the assembled small articulated slab bridge requires higher bearing capacity. However, due to the insufficient lateral connection stiffness, the single girder of the small articulated slab bridge is stressed, which accelerates the damage of the bridge. Therefore, in order to make the bridge meet the increasing load requirements, it is necessary to carry out necessary and reasonable reinforcement.

Strengthening the small hinged slab bridge with sprayed concrete can enhance its lateral connection stiffness, thus improving the overall performance of the bridge structure and avoiding the stress on the single plate; At the same time, the stiffness and strength of the panel itself are greatly improved. On the one hand, the stress state is more reasonable, on the other hand, the bearing capacity of the panel itself is greatly improved.

Extended data:

Bridges are generally composed of superstructure, substructure, bearings and ancillary structures. Superstructure, also known as bridge-span structure, is the main structure that spans obstacles. The substructure includes abutment, pier and foundation; The bearing is a force transmission device arranged at the bearing of the bridge span structure and the pier or abutment; Accessory buildings refer to bridge end transition slab, cone slope protection, bank protection, diversion works, etc.

Bridges enable roads, railways or sidewalks to cross rivers, lakes, valleys, canyons or other roads. Bridges are mostly fixed, but some bridges can be raised or rotated. No matter what kind of bridge, the design and construction problems faced by engineers are to make the bridge structure firm and not sink or break due to weight.

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