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Construction method for arch rib closure section of steel box girder tie bar steel arch bridge
The invention relates to a steel box girder tie bar steel arch bridge arch rib closure section construction method which comprises the following steps: drawing a temperature-closure section length variation change curve according to the space distance of a closure section and the temperature of a construction site before the closure section is installed, calculating the length of the closure section according to the designed closure temperature, and determining the optimal closure temperature; lineation cutting of the allowance of the closure section is carried out under the optimal closure temperature condition, and the installation time of the closure section can be shortened; an arch rib axis and an outer edge line are measured on the arch rib temporary buttress, and a limiting and guiding device is welded to the outer edge line so that the installation direction can be determined in advance; after the closure section is hoisted to a designed position, the elevation of each joint and the axis of the closure section are checked, checked and adjusted, and after the closure section is correct, the closure section is butted in place and is connected and fixed by a code plate, corrected and assembled, so that the hoisting stability and precision of the closure section can be ensured, accurate closure is realized, and the line shape is protected.
本发明涉及钢箱梁系杆钢拱桥拱肋合拢段施工方法，所述施工方法在合龙段安装前根据合龙段的空间距离、施工现场温度绘制温度‑合龙段长度变化量变化曲线，按照设计合龙温度计算合龙段长度及确定最佳合龙温度，并在最佳合龙温度条件下进行合龙段余量的划线切割，能够压缩合龙段安装时间；在拱肋临时支墩上测放出拱肋轴线及外缘边线，在外缘边线位置焊接限位及导向装置，以提前明确安装方位；合龙段吊运至设计位置后，检查、校核、调整各接头的标高、合龙段轴线，无误后，对接就位，用码板连接固定，校正装配，能够保证合龙段的吊装稳定性和精度，实现精确合龙并保护线形。
Construction method for arch rib closure section of steel box girder tie bar steel arch bridge
The invention relates to a steel box girder tie bar steel arch bridge arch rib closure section construction method which comprises the following steps: drawing a temperature-closure section length variation change curve according to the space distance of a closure section and the temperature of a construction site before the closure section is installed, calculating the length of the closure section according to the designed closure temperature, and determining the optimal closure temperature; lineation cutting of the allowance of the closure section is carried out under the optimal closure temperature condition, and the installation time of the closure section can be shortened; an arch rib axis and an outer edge line are measured on the arch rib temporary buttress, and a limiting and guiding device is welded to the outer edge line so that the installation direction can be determined in advance; after the closure section is hoisted to a designed position, the elevation of each joint and the axis of the closure section are checked, checked and adjusted, and after the closure section is correct, the closure section is butted in place and is connected and fixed by a code plate, corrected and assembled, so that the hoisting stability and precision of the closure section can be ensured, accurate closure is realized, and the line shape is protected.
本发明涉及钢箱梁系杆钢拱桥拱肋合拢段施工方法，所述施工方法在合龙段安装前根据合龙段的空间距离、施工现场温度绘制温度‑合龙段长度变化量变化曲线，按照设计合龙温度计算合龙段长度及确定最佳合龙温度，并在最佳合龙温度条件下进行合龙段余量的划线切割，能够压缩合龙段安装时间；在拱肋临时支墩上测放出拱肋轴线及外缘边线，在外缘边线位置焊接限位及导向装置，以提前明确安装方位；合龙段吊运至设计位置后，检查、校核、调整各接头的标高、合龙段轴线，无误后，对接就位，用码板连接固定，校正装配，能够保证合龙段的吊装稳定性和精度，实现精确合龙并保护线形。
Construction method for arch rib closure section of steel box girder tie bar steel arch bridge
钢箱梁系杆钢拱桥拱肋合拢段施工方法
YUAN ZHENGWU (author) / QIAO YUANYUAN (author) / LIU NIANMING (author) / XU KAIYAN (author) / LIU WEI (author) / WANG HUI (author) / ZHONG JIANCONG (author)
2022-04-12
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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