Characteristics of deformation of saturated soft clay under the load of Shanghai subway line No. 2 |
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Authors: | Yi-qun Tang Ping Yang Shu-kai Zhao Xi Zhang Jian-xiu Wang |
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Institution: | (1) Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, People’s Republic of China;(2) Department of Geotechnical Engineering, Tongji University, Shanghai, 200092, People’s Republic of China;(3) United Research Center for Urban Environment and Sustainable Development, The Ministry of Education, Beijing, 200065, People’s Republic of China |
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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.
An erratum to this article can be found at |
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Keywords: | Saturated soft clay Subway tunnel Subway load Characteristics of deformation Geotechnical digital systems |
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