Research on the Feasibility of the Construction of In-situ Suspension Protection Structure for Power Pipe Gallery
A subway station project constructed by cover-excavation 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,ultra-wide 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 high-pressure,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 pipe gallery.
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