Single-span simply supported beam bridge structure applicable to coal mining subsidence area

Abstract

The invention discloses a single-span simply supported beam bridge structure applicable to a coal mining subsidence area. The single-span simply supported beam bridge structure applicable to the coal mining subsidence area comprises a bridge abutment, a foundation, a bridge deck slab, and supports, the top surface of the bridge abutment is of a broken-line structure, and comprises a horizontal plane in the middle and slant planes on the two sides, the number of the supports is three, wherein two of the supports are placed on one side of the bridge abutment, and the other one is placed on the other side of the bridge abutment. In a surface deformation process, since the three supports are adopted to be placed in the bridge pier and abutment, the plane of the bridge deck slab can be consistent with the plane which is formed by the top surfaces of the three supports all the time according to the principle that random three points in the space can determine a plane, and thus the bridge deck slab is prevented from being fractured. The top surface of the bridge abutment of the broken-line structure can effectively limit the horizontal displacement of the bridge deck slab, and thus the occurrence of beam falling accidents is prevented.

Description

technical field [0001] The invention relates to a flexible simply supported girder bridge structure, which is suitable for bridge engineering built in coal mining subsidence areas, and can ensure the safety and stability of the bridge structure in the process of surface deformation. Background technique [0002] In order to meet the social and economic development, people have increased the development and utilization of underground resources. Coal, oil, natural gas, groundwater and other resources are continuously extracted from the ground, which will inevitably damage the underground rock mass and soil. The original stress balance state causes the stress redistribution in the rock and soil body, and the rock stratum moves, deforms and destroys. When the underground mining area reaches a certain range, the movement that starts near the stope will expand to the surface, forming a surface deformation zone. Whether it is mining technology to reduce surface subsidence, includin...

AI Technical Summary

Problems solved by technology

Normal bridge design generally does not consider the surface deformation caused by coal mining subsidence, and its structure's ability to resist surface deformation is very limited

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