Abstract
Shanghai subway Line No. 2 passes through the center of Shanghai from Songhong Road station in the west to Zhangjianggaoke station in the east. The total length of Shanghai subway Line No. 2 is 25 km. The tunnel mostly lies in the saturated soft clay and the environment issue can not be ignored. The response frequency and response stress of soil around the tunnel are monitored when the subway train passes through. The cyclic triaxial test of the saturated soft clay around the subway tunnel is conducted using the data monitored. The characteristics of deformation of the saturated soft clay of Shanghai under the subway load are analyzed. The results show that when the subway train Line No. 2 begins to run, a small and vertical rebound first occurs in the saturated soft clay at the side wall of the tunnel. Although a large deformation does not occur in the saturated soft clay at the side wall of the tunnel when the subway train has run for a period of time, yet with the lapse of time, a perceptive and non-uniform deformation will still occur. The vertical rebound is transitory and a plastic deformation occurs immediately in the saturated soft clay at the bottom of the tunnel, the large deformation at the bottom of the tunnel is 30 times that of the saturated soft clay at the side wall of the tunnel.
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Acknowledgments
This investigation is supported by the Chinese National Natural Science Fund, Project No.40372124 and the Ministry of Land and Resources P.R.C and Shanghai Research Fund, Project No. 2004.011-02.The authors are deeply indebted to the two financial supporters.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s00254-007-1117-8
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Tang, Yq., Yang, P., Zhao, Sk. et al. Characteristics of deformation of saturated soft clay under the load of Shanghai subway line No. 2. Environ Geol 54, 1197–1203 (2008). https://doi.org/10.1007/s00254-007-0902-8
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DOI: https://doi.org/10.1007/s00254-007-0902-8