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A platform for research: civil engineering, architecture and urbanism
Curve simply supported bridge structure overcrossing existing railway and construction method
The invention discloses a curve simply supported bridge structure overcrossing an existing railway and a construction method, a bridge comprises a bearing platform, the bottom of the bearing platform is provided with a foundation, the top of the bearing platform is provided with a cover beam through a pier, the cover beam is a variable cross-section beam, and the center line of a beam body of the cover beam is perpendicular to the line center line at the center stake mark; the width of the section of a beam body in the bridge direction is gradually increased from the inner side of a curve to the outer side of the curve, the variation amplitude is matched with the curvature of the curve, beam falling prevention stop blocks are arranged at the two ends of the bent cap, and a plurality of rectangular beams are erected on the top of the beam body between the beam falling prevention stop blocks at intervals through supporting padstones and supports. The rectangular beams are parallel to one another and are prefabricated according to the same size, the two ends of each rectangular beam are connected with the adjacent rectangular beams into a whole through the corresponding variable-cross-section post-cast strip, and the bridge deck and the bridge deck system are sequentially arranged at the top ends of the rectangular beams and the top ends of the variable-cross-section post-cast strips. Equal-size rectangular beams are adopted for achieving erection of the highway-crossing-railway curved bridge, the construction difficulty is lowered, the construction speed is increased, and the influence on existing railway operation is reduced.
本发明公开了一种上跨既有铁路的曲线简支桥梁结构及施工方法，桥梁包括承台，承台底部设有基础，顶部通过桥墩设有盖梁，盖梁为变截面梁，其梁体中心线与其中心桩号处的线路中心线垂直，其梁体顺桥向的截面宽度从曲线内侧向曲线外侧逐渐变大，且变化幅度与曲线的曲率相匹配，盖梁两端设置有防落梁挡块，且防落梁挡块之间的梁体顶部通过支撑垫石和支座间隔搭设有若干根矩形梁，若干根矩形梁相互平行并按相同尺寸预制，矩形梁两端通过变截面后浇带与邻跨设置的矩形梁连为一体，且矩形梁及变截面后浇带顶端依次设置有桥面板和桥面系。本发明采用等尺寸矩形梁实现公跨铁曲线桥的搭设，降低了施工难度，加快了施工速度，减少了对既有铁路运营的影响。
Curve simply supported bridge structure overcrossing existing railway and construction method
The invention discloses a curve simply supported bridge structure overcrossing an existing railway and a construction method, a bridge comprises a bearing platform, the bottom of the bearing platform is provided with a foundation, the top of the bearing platform is provided with a cover beam through a pier, the cover beam is a variable cross-section beam, and the center line of a beam body of the cover beam is perpendicular to the line center line at the center stake mark; the width of the section of a beam body in the bridge direction is gradually increased from the inner side of a curve to the outer side of the curve, the variation amplitude is matched with the curvature of the curve, beam falling prevention stop blocks are arranged at the two ends of the bent cap, and a plurality of rectangular beams are erected on the top of the beam body between the beam falling prevention stop blocks at intervals through supporting padstones and supports. The rectangular beams are parallel to one another and are prefabricated according to the same size, the two ends of each rectangular beam are connected with the adjacent rectangular beams into a whole through the corresponding variable-cross-section post-cast strip, and the bridge deck and the bridge deck system are sequentially arranged at the top ends of the rectangular beams and the top ends of the variable-cross-section post-cast strips. Equal-size rectangular beams are adopted for achieving erection of the highway-crossing-railway curved bridge, the construction difficulty is lowered, the construction speed is increased, and the influence on existing railway operation is reduced.
本发明公开了一种上跨既有铁路的曲线简支桥梁结构及施工方法，桥梁包括承台，承台底部设有基础，顶部通过桥墩设有盖梁，盖梁为变截面梁，其梁体中心线与其中心桩号处的线路中心线垂直，其梁体顺桥向的截面宽度从曲线内侧向曲线外侧逐渐变大，且变化幅度与曲线的曲率相匹配，盖梁两端设置有防落梁挡块，且防落梁挡块之间的梁体顶部通过支撑垫石和支座间隔搭设有若干根矩形梁，若干根矩形梁相互平行并按相同尺寸预制，矩形梁两端通过变截面后浇带与邻跨设置的矩形梁连为一体，且矩形梁及变截面后浇带顶端依次设置有桥面板和桥面系。本发明采用等尺寸矩形梁实现公跨铁曲线桥的搭设，降低了施工难度，加快了施工速度，减少了对既有铁路运营的影响。
Curve simply supported bridge structure overcrossing existing railway and construction method
一种上跨既有铁路的曲线简支桥梁结构及施工方法
LU CHENGYUN (author) / ZHANG ZHICHEN (author) / ZHOU YI (author) / ZENG ZHIWEN (author)
2022-05-06
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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