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Large-span suspension bridge steel box girder welding frame synchronous construction method
The invention discloses a large-span suspension bridge steel box girder welding frame synchronous construction method. The synchronous construction method comprises the following steps that S1, reasonable opportunity points at which every two steel box girders start to be welded in the hoisting process are determined through theoretical calculation; s2, after the opportunity points of pairwise welding connection are determined, construction between steel box girder segments is started; s3, two circumferential weld temporary construction truss platforms are additionally arranged on the steel box girder segments; s4, before the main bridge steel box girder is through, two working faces are arranged for bridge site main welding seam construction, and meanwhile, construction is conducted from the midspan steel box girder section to the main towers on the two sides; and s5, after the steel box girders are hoisted to the opportunity points, site constructors enter the site for construction, every two sections are welded firstly after the steel box girders are hoisted, and then the sections of the steel box girders are all connected into a whole. By the adoption of the construction method, multi-working-face construction that steel box girders are rigidly connected pairwise at proper opportunity points in the hoisting process, and welding frames are synchronous is adopted, so that the erection period of stiffening girders is shortened.
本发明公开了大跨径悬索桥钢箱梁焊架同步施工方法，包括以下步骤：步骤S1：通过理论计算确定钢箱梁在吊装过程中开始两两焊接的合理时机点；步骤S2：确定好两两刚接的时机点后，即开始进行钢箱梁节段间施工；步骤S3：钢箱梁节段上增加两个环焊缝临时施工桁架平台；步骤S4：在主桥钢箱梁未贯通前，桥位主焊缝施工安排两个作业面，同时从跨中钢箱梁节段向两侧主塔方向进行施工；步骤S5：钢箱梁吊装至前述时机点后，现场施工人员进入现场施工，钢箱梁吊装后采用两两节段间先焊接，再将钢箱梁节段全部连接成整体；本发明采用这一施工方法，即“钢箱梁在吊装过程中选择合适的时机点开始两两刚接、焊架同步”的多作业面施工，以缩短加劲梁架设工期。
Large-span suspension bridge steel box girder welding frame synchronous construction method
The invention discloses a large-span suspension bridge steel box girder welding frame synchronous construction method. The synchronous construction method comprises the following steps that S1, reasonable opportunity points at which every two steel box girders start to be welded in the hoisting process are determined through theoretical calculation; s2, after the opportunity points of pairwise welding connection are determined, construction between steel box girder segments is started; s3, two circumferential weld temporary construction truss platforms are additionally arranged on the steel box girder segments; s4, before the main bridge steel box girder is through, two working faces are arranged for bridge site main welding seam construction, and meanwhile, construction is conducted from the midspan steel box girder section to the main towers on the two sides; and s5, after the steel box girders are hoisted to the opportunity points, site constructors enter the site for construction, every two sections are welded firstly after the steel box girders are hoisted, and then the sections of the steel box girders are all connected into a whole. By the adoption of the construction method, multi-working-face construction that steel box girders are rigidly connected pairwise at proper opportunity points in the hoisting process, and welding frames are synchronous is adopted, so that the erection period of stiffening girders is shortened.
本发明公开了大跨径悬索桥钢箱梁焊架同步施工方法，包括以下步骤：步骤S1：通过理论计算确定钢箱梁在吊装过程中开始两两焊接的合理时机点；步骤S2：确定好两两刚接的时机点后，即开始进行钢箱梁节段间施工；步骤S3：钢箱梁节段上增加两个环焊缝临时施工桁架平台；步骤S4：在主桥钢箱梁未贯通前，桥位主焊缝施工安排两个作业面，同时从跨中钢箱梁节段向两侧主塔方向进行施工；步骤S5：钢箱梁吊装至前述时机点后，现场施工人员进入现场施工，钢箱梁吊装后采用两两节段间先焊接，再将钢箱梁节段全部连接成整体；本发明采用这一施工方法，即“钢箱梁在吊装过程中选择合适的时机点开始两两刚接、焊架同步”的多作业面施工，以缩短加劲梁架设工期。
Large-span suspension bridge steel box girder welding frame synchronous construction method
大跨径悬索桥钢箱梁焊架同步施工方法
ZHOU CHANGDONG (author) / YUAN QINGHUA (author) / HUANG CHUBIN (author) / GAO YUFENG (author) / SHI FEI (author) / DAI MINGJING (author) / ZHANG BO (author) / ZHENG CHUNXIAO (author) / ZHU TENGFEI (author) / GAO RUNKUN (author)
2021-06-11
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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