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A platform for research: civil engineering, architecture and urbanism
Curve steel box girder incremental launching construction method
The invention discloses a curved steel box girder incremental launching construction method. The technical problems that in the prior art, during curved steel box girder incremental launching construction, incremental launching of steel box girders on the two sides is not synchronous, consequently, the axis of a steel box bridge deviates from the theoretical position, and the horizontal line of the steel box bridge is affected are solved. The method comprises the following steps: arranging a pushing buttress platform and an assembling bracket, hoisting a section 3 to a section 7, welding, pushing, sequentially pushing for 20 meters, 3 meters, 22 meters, 3 meters and 11 meters towards a large mileage direction, hoisting side-span steel beams towards two sides by adopting a truck crane, and welding a curve steel box beam. The method is mainly used for incremental launching construction of the curved steel box girder with the curvature radius smaller than 300 m and the radius difference between an arc and an outer arc smaller than 6 m, the axis of the curved steel box girder can be effectively controlled to be always kept within the allowable range in the incremental launching process, and the phenomenon that incremental launching of the steel box girders on the two sides is not synchronous in the incremental launching construction process of the curved steel box girder is avoided; the steel box bridge axis can be effectively prevented from deviating from the theoretical position, and it is guaranteed that the curve steel box girder horizontal line is not affected.
本发明公开了一种曲线钢箱梁顶推施工方法，解决现有技术曲线钢箱梁顶推施工时两侧钢箱梁顶推不同步导致钢箱桥梁轴线偏离理论位置并影响钢箱桥梁水平线的技术问题。本发明方法为：布设顶推支墩平台和拼装支架，吊装节段3～节段7并焊接后顶推，依次向大里程方向顶推20米、3米、22米、3米和11米，采用汽车吊依次向两侧吊装边跨钢梁后焊接曲线钢箱梁。本发明主要针对曲率半径小于300m且弧与外弧半径差小于6m的曲线钢箱梁顶推施工，可有效控制曲线钢箱梁的轴线在顶推过程中始终保持在允许范围内，避免曲线钢箱梁在顶推施工过程中出现两侧钢箱梁顶推不同步现象，能够有效克服钢箱桥梁轴线偏离理论位置并保证曲线钢箱梁水平线不受影响。
Curve steel box girder incremental launching construction method
The invention discloses a curved steel box girder incremental launching construction method. The technical problems that in the prior art, during curved steel box girder incremental launching construction, incremental launching of steel box girders on the two sides is not synchronous, consequently, the axis of a steel box bridge deviates from the theoretical position, and the horizontal line of the steel box bridge is affected are solved. The method comprises the following steps: arranging a pushing buttress platform and an assembling bracket, hoisting a section 3 to a section 7, welding, pushing, sequentially pushing for 20 meters, 3 meters, 22 meters, 3 meters and 11 meters towards a large mileage direction, hoisting side-span steel beams towards two sides by adopting a truck crane, and welding a curve steel box beam. The method is mainly used for incremental launching construction of the curved steel box girder with the curvature radius smaller than 300 m and the radius difference between an arc and an outer arc smaller than 6 m, the axis of the curved steel box girder can be effectively controlled to be always kept within the allowable range in the incremental launching process, and the phenomenon that incremental launching of the steel box girders on the two sides is not synchronous in the incremental launching construction process of the curved steel box girder is avoided; the steel box bridge axis can be effectively prevented from deviating from the theoretical position, and it is guaranteed that the curve steel box girder horizontal line is not affected.
本发明公开了一种曲线钢箱梁顶推施工方法，解决现有技术曲线钢箱梁顶推施工时两侧钢箱梁顶推不同步导致钢箱桥梁轴线偏离理论位置并影响钢箱桥梁水平线的技术问题。本发明方法为：布设顶推支墩平台和拼装支架，吊装节段3～节段7并焊接后顶推，依次向大里程方向顶推20米、3米、22米、3米和11米，采用汽车吊依次向两侧吊装边跨钢梁后焊接曲线钢箱梁。本发明主要针对曲率半径小于300m且弧与外弧半径差小于6m的曲线钢箱梁顶推施工，可有效控制曲线钢箱梁的轴线在顶推过程中始终保持在允许范围内，避免曲线钢箱梁在顶推施工过程中出现两侧钢箱梁顶推不同步现象，能够有效克服钢箱桥梁轴线偏离理论位置并保证曲线钢箱梁水平线不受影响。
Curve steel box girder incremental launching construction method
一种曲线钢箱梁顶推施工方法
ZHANG HAICHUAN (author) / FU HANG (author) / WANG YONGDONG (author) / LEE DONG-IK (author) / TANG LEI (author)
2022-11-11
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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