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Method for monitoring incremental launching construction of bridge steel box girder crossing coal mine goaf
The invention discloses a method for monitoring incremental launching construction of a bridge steel box girder crossing a coal mine goaf. The method comprises the following steps that (1) the deflection of the steel box girder and a guide girder is monitored; 2) monitoring the axis deviation of the steel box girder; 3) monitoring the stress of the temporary pier bracket at the joint of the steel box girder and the guide beam; (4) pier top displacement of the temporary pier support is monitored; 5) monitoring the settlement of the temporary pier foundation; and (6) the beam falling stage is monitored. According to the method, incremental launching construction of the bridge steel box girder crossing the coal mine goaf is monitored, and parameters such as axis deviation of the steel box girder, horizontal displacement of the pier top of a temporary pier, maximum cantilever deflection of the front end of a steel guide beam, stress at the joint of the steel box girder and the guide beam, stress at the pier bottom of the temporary pier and the like are monitored; and then corresponding measures are taken to ensure that the differential settlement of the two sides of the temporary pier bearing platform is always controlled within 10mm, so that the safety risk of incremental launching construction of crossing the existing line coal mine goaf is greatly reduced, and the construction requirement is met.
本发明公开了对跨越煤矿采空区桥梁钢箱梁顶推施工进行监控的方法，包括以下步骤：1）对钢箱梁、导梁挠度进行监控；2）对钢箱梁轴线偏位进行监控；3）对钢箱梁与导梁连接处、临时墩支架应力进行监控；4）对临时墩支架墩顶位移进行监控；5）对临时墩基础沉降进行监控；6）对落梁阶段进行监控。本发明通过提供对跨越煤矿采空区桥梁钢箱梁顶推施工进行监控，包括对钢箱梁轴线偏位、临时墩墩顶水平位移、钢导梁前端最大悬臂挠度、钢箱梁与导梁连接处应力、临时墩墩底应力等参数进行监测，进而采取相应措施保证临时墩承台两侧不均匀沉降始终控制在10mm以内，以此大大降低跨越既有线煤矿采空区顶推施工的安全风险，以满足施工要求。
Method for monitoring incremental launching construction of bridge steel box girder crossing coal mine goaf
The invention discloses a method for monitoring incremental launching construction of a bridge steel box girder crossing a coal mine goaf. The method comprises the following steps that (1) the deflection of the steel box girder and a guide girder is monitored; 2) monitoring the axis deviation of the steel box girder; 3) monitoring the stress of the temporary pier bracket at the joint of the steel box girder and the guide beam; (4) pier top displacement of the temporary pier support is monitored; 5) monitoring the settlement of the temporary pier foundation; and (6) the beam falling stage is monitored. According to the method, incremental launching construction of the bridge steel box girder crossing the coal mine goaf is monitored, and parameters such as axis deviation of the steel box girder, horizontal displacement of the pier top of a temporary pier, maximum cantilever deflection of the front end of a steel guide beam, stress at the joint of the steel box girder and the guide beam, stress at the pier bottom of the temporary pier and the like are monitored; and then corresponding measures are taken to ensure that the differential settlement of the two sides of the temporary pier bearing platform is always controlled within 10mm, so that the safety risk of incremental launching construction of crossing the existing line coal mine goaf is greatly reduced, and the construction requirement is met.
本发明公开了对跨越煤矿采空区桥梁钢箱梁顶推施工进行监控的方法，包括以下步骤：1）对钢箱梁、导梁挠度进行监控；2）对钢箱梁轴线偏位进行监控；3）对钢箱梁与导梁连接处、临时墩支架应力进行监控；4）对临时墩支架墩顶位移进行监控；5）对临时墩基础沉降进行监控；6）对落梁阶段进行监控。本发明通过提供对跨越煤矿采空区桥梁钢箱梁顶推施工进行监控，包括对钢箱梁轴线偏位、临时墩墩顶水平位移、钢导梁前端最大悬臂挠度、钢箱梁与导梁连接处应力、临时墩墩底应力等参数进行监测，进而采取相应措施保证临时墩承台两侧不均匀沉降始终控制在10mm以内，以此大大降低跨越既有线煤矿采空区顶推施工的安全风险，以满足施工要求。
Method for monitoring incremental launching construction of bridge steel box girder crossing coal mine goaf
对跨越煤矿采空区桥梁钢箱梁顶推施工进行监控的方法
LIANG PENGGANG (author) / KANG SHIN-HA (author) / CAO WEN (author) / HAO YUFENG (author)
2024-01-26
Patent
Electronic Resource
Chinese
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