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A platform for research: civil engineering, architecture and urbanism
Large-span self-anchored steel box girder suspension bridge track lofting and measuring method
The invention discloses a large-span self-anchored steel box girder suspension bridge track lofting and measuring method. The method comprises the steps: controlling elevation with a tower column as the benchmark; conducting lofting along a girder surface to control a base mark, and conducting lofting along the center line of a track line to densify the base mark; obtaining the influence of the girder surface temperature on the elevation, determining a concrete pouring time period according to the influence, and formulating an elevation temperature fitting line; formulating an elevation load fitting line according to the load of later construction; correcting the actually measured surface line shape of the large bridge by using the elevation temperature fitting line, the elevation load fitting line and the track structure design height to obtain a track laying fitting line shape; calculating the structural thickness of the ballast bed according to the height difference between the railsurface and the girder surface, and then laying the ballast bed; erecting track panels section by section, and then laying a track. By arranging the encryption base mark, elevation measurement is facilitated, the stable line type of the bridge is conveniently determined, and measurement control in construction is facilitated; in the track arranging process, a relative elevation difference value fixed control method is used for correction again, and the problem that bridge deck track laying is affected due to the fact that the bridge deck elevation is dynamically changed all the time is effectively solved.
本发明公开了大跨度自锚式钢箱梁悬索桥轨道放样与测量方法，包括以塔柱为基准控制高程：沿梁面放样控制基标，沿轨道线路的中线放样加密基标；获取梁面温度对高程的影响，根据影响确定混凝土浇筑时间段并制定高程温度拟合线；根据后期施工的荷载，制定高程荷载拟合线；再用高程温度拟合线、高程荷载拟合线和轨道结构设计高度修正实测的大桥梁面线形，获得铺轨拟合线形；再根据轨面和梁面的高差，计算道床的结构厚度后铺设；逐段架设轨排后铺轨。通过设置加密基标，便于高程测量、便于确定桥梁的稳定线型、便于施工中的测量控制；在排轨过程中，运用相对高程差值固定控制法再次修正，有效解决了桥面高程时刻处于动态变化对桥面铺轨影响的难题。
Large-span self-anchored steel box girder suspension bridge track lofting and measuring method
The invention discloses a large-span self-anchored steel box girder suspension bridge track lofting and measuring method. The method comprises the steps: controlling elevation with a tower column as the benchmark; conducting lofting along a girder surface to control a base mark, and conducting lofting along the center line of a track line to densify the base mark; obtaining the influence of the girder surface temperature on the elevation, determining a concrete pouring time period according to the influence, and formulating an elevation temperature fitting line; formulating an elevation load fitting line according to the load of later construction; correcting the actually measured surface line shape of the large bridge by using the elevation temperature fitting line, the elevation load fitting line and the track structure design height to obtain a track laying fitting line shape; calculating the structural thickness of the ballast bed according to the height difference between the railsurface and the girder surface, and then laying the ballast bed; erecting track panels section by section, and then laying a track. By arranging the encryption base mark, elevation measurement is facilitated, the stable line type of the bridge is conveniently determined, and measurement control in construction is facilitated; in the track arranging process, a relative elevation difference value fixed control method is used for correction again, and the problem that bridge deck track laying is affected due to the fact that the bridge deck elevation is dynamically changed all the time is effectively solved.
本发明公开了大跨度自锚式钢箱梁悬索桥轨道放样与测量方法，包括以塔柱为基准控制高程：沿梁面放样控制基标，沿轨道线路的中线放样加密基标；获取梁面温度对高程的影响，根据影响确定混凝土浇筑时间段并制定高程温度拟合线；根据后期施工的荷载，制定高程荷载拟合线；再用高程温度拟合线、高程荷载拟合线和轨道结构设计高度修正实测的大桥梁面线形，获得铺轨拟合线形；再根据轨面和梁面的高差，计算道床的结构厚度后铺设；逐段架设轨排后铺轨。通过设置加密基标，便于高程测量、便于确定桥梁的稳定线型、便于施工中的测量控制；在排轨过程中，运用相对高程差值固定控制法再次修正，有效解决了桥面高程时刻处于动态变化对桥面铺轨影响的难题。
Large-span self-anchored steel box girder suspension bridge track lofting and measuring method
大跨度自锚式钢箱梁悬索桥轨道放样与测量方法
REN HUAQING (author) / YOU ZHIHAO (author) / DUAN YUSHUN (author) / CHEN YANJUN (author) / QIN HONGFEI (author) / WANG PENG (author) / FAN XIANZHI (author) / HUAN PEIDONG (author) / WEN DE (author) / LI HAIYANG (author)
2020-05-15
Patent
Electronic Resource
Chinese
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