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- W2390506009 abstract "The project 7381 was constructed in the early 1970s,which was designed according to the subway standard at that time.This tunnel runs through silty clay and thin sand layer 10~20 meters beneath the ground.In order to evaluate its current serviceability for the subway,a detail investigation is conducted from the aspects of load-bearing capacity,configuration, deformation and concrete cracks.The field investigation focuses on concrete strength,concrete carbonization,concrete surface cracks,strength and rust of steel bars as well as concrete layer thickness of the tunnel arc.Based on the field investigation results,the load bearing capability of the main tunnel and the connected three arcs at station area are analyzed by finite element method.The Terzaghi Model is employed for the determination of wall rock pressure after comparison of five models.The result shows that the tunnel satisfies the relevant code in load bearing capability.The structural damage and degradation mechanism of the lining is analyzed,and corresponding countermeasures are proposed.The conclusion is that this tunnel can be used for current subway after proper renovation;the left service life is estimated as 80 years." @default.
- W2390506009 created "2016-06-24" @default.
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- W2390506009 date "2007-01-01" @default.
- W2390506009 modified "2023-09-24" @default.
- W2390506009 title "Study on the Safety Evaluation of Existing Underground Structure" @default.
- W2390506009 hasPublicationYear "2007" @default.
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