电力管廊原位悬吊保护结构施工可行性研究

Research on the Feasibility of the Construction of In-situ Suspension Protection Structure for Power Pipe Gallery

文章以某上跨电力管廊盖挖逆作地铁车站工程为研究实例,针对现有技术无法满足特高压、超深、超宽、超重钢筋混凝土电力管廊悬吊保护施工的结构安全问题,提出一种电力管廊原位悬吊保护结构体系,通过数值模拟、现场监测两种手段进行汇总分析。分析可知,该原位悬吊保护体系可有效保证高压、超深、超宽、超重钢筋混凝土电力管廊盖挖逆作施工下的结构安全,且实际操作效果最大沉降为2.2 mm,优于模拟计算结果的最大沉降10.0 mm,沉降量受管廊下部结构施工开挖深度及结构形式的影响较大。

A subway station project constructed by coverexcavation inverse method passing over the power pipe gallery is taken as an example.Aiming at the structural safety problem that the existing technology can not meet the requirements of ultra-high voltage,ultra-deep,ultrawide and overweight reinforced concrete power pipe gallery suspension protection construction,an in-situ suspension protection structure system for power pipe gallery is proposed,which is summarized and analyzed by numerical simulation and field monitoring.The analysis shows that the in-situ suspension protection system can effectively ensure the structural safety of the highpressure,ultra-deep,ultra-wide and overweight reinforced concrete power pipe gallery under the cover-excavation inverse construction,and the maximum settlement of the actual operation effect is 2.2 mm,which is better than the maximum settlement of 10.0 mm calculated by simulation.The settlement is greatly affected by the excavation depth and structural form of the lower structure of the pipegallery.