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A platform for research: civil engineering, architecture and urbanism
Bracket-free construction method for large-span cast-in-place concrete arch bridge
The invention discloses a bracket-free construction method for a large-span cast-in-place concrete arch bridge, belongs to the field of bridge engineering, and aims to guarantee the safety and economy of construction. The concrete beam pieces are spliced into a left half auxiliary arch frame unit and a right half auxiliary arch frame unit in the longitudinal direction of the arch bridge, and the tops of every two adjacent prefabricated concrete beam pieces are hinged; a hydraulic telescopic arm is installed on a bridge abutment, and a roller is hoisted at the outer end of the hydraulic telescopic arm; the left half auxiliary arch frame unit and the right half auxiliary arch frame unit are reversely rolled on the periphery of the corresponding roller, and the first section concrete beam piece of the left half auxiliary arch frame unit and the first section concrete beam piece of the right half auxiliary arch frame unit are inserted into the inserting hole in the arch seat; the hydraulic telescopic arm longitudinally rolls, pushes and slowly lifts the left and right half-range arch frame units to the middle to be folded into a whole pair of arch frame units; pre-stress tensioning is carried out; and finally the arch ring is constructed. According to the method, no bracket is needed in the whole process, the safety risks such as differential settlement and bracket collapse are eliminated, and the construction safety is greatly improved; bracket related cost is saved, the construction cost is reduced, and the construction period is shortened; and the structure is optimized.
本发明大跨度现浇混凝土拱桥无支架施工方法，属于桥梁工程领域，目的是保障施工的安全性和经济性。将混凝土梁片沿拱桥纵向拼装成左半副拱架单元和右半副拱架单元，相邻两片预制混凝土梁片的顶部铰接；在桥台上安装液压伸缩臂，在液压伸缩臂的外端吊装滚筒；将左半副拱架单元和右半副拱架单元反向卷在对应滚筒外周，并将左右半副拱架单元的首段混凝土梁片插接于拱座上的插接孔内；液压伸缩臂纵向卷推缓升左右半幅拱架单元至中间合拢成整副拱架单元；进行预应力张拉；最后施工拱圈。本发明，全程无需支架，消除了不均匀沉降、支架坍塌等安全风险，大大提高了施工的安全性；节约了支架相关费用，缩减了施工费用及施工周期；结构更优化。
Bracket-free construction method for large-span cast-in-place concrete arch bridge
The invention discloses a bracket-free construction method for a large-span cast-in-place concrete arch bridge, belongs to the field of bridge engineering, and aims to guarantee the safety and economy of construction. The concrete beam pieces are spliced into a left half auxiliary arch frame unit and a right half auxiliary arch frame unit in the longitudinal direction of the arch bridge, and the tops of every two adjacent prefabricated concrete beam pieces are hinged; a hydraulic telescopic arm is installed on a bridge abutment, and a roller is hoisted at the outer end of the hydraulic telescopic arm; the left half auxiliary arch frame unit and the right half auxiliary arch frame unit are reversely rolled on the periphery of the corresponding roller, and the first section concrete beam piece of the left half auxiliary arch frame unit and the first section concrete beam piece of the right half auxiliary arch frame unit are inserted into the inserting hole in the arch seat; the hydraulic telescopic arm longitudinally rolls, pushes and slowly lifts the left and right half-range arch frame units to the middle to be folded into a whole pair of arch frame units; pre-stress tensioning is carried out; and finally the arch ring is constructed. According to the method, no bracket is needed in the whole process, the safety risks such as differential settlement and bracket collapse are eliminated, and the construction safety is greatly improved; bracket related cost is saved, the construction cost is reduced, and the construction period is shortened; and the structure is optimized.
本发明大跨度现浇混凝土拱桥无支架施工方法，属于桥梁工程领域，目的是保障施工的安全性和经济性。将混凝土梁片沿拱桥纵向拼装成左半副拱架单元和右半副拱架单元，相邻两片预制混凝土梁片的顶部铰接；在桥台上安装液压伸缩臂，在液压伸缩臂的外端吊装滚筒；将左半副拱架单元和右半副拱架单元反向卷在对应滚筒外周，并将左右半副拱架单元的首段混凝土梁片插接于拱座上的插接孔内；液压伸缩臂纵向卷推缓升左右半幅拱架单元至中间合拢成整副拱架单元；进行预应力张拉；最后施工拱圈。本发明，全程无需支架，消除了不均匀沉降、支架坍塌等安全风险，大大提高了施工的安全性；节约了支架相关费用，缩减了施工费用及施工周期；结构更优化。
Bracket-free construction method for large-span cast-in-place concrete arch bridge
大跨度现浇混凝土拱桥无支架施工方法
GAO CHAORAN (author) / TIAN HAIYAN (author)
2021-11-26
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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