Long-term nonlinear consolidation of soil around a shield tunnel with partially sealing linings under train loading
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(1. Hydrochina Huadong Engineering Corporation, Hydrochina Corporation, 310014 Hangzhou, China; 2. College of Civil Engineering and Architecture, Zhejiang University, 310058 Hangzhou, China; 3.Institute of Geotechnical Engineering, Nanjing Tech University, 210000 Nanjing, China)

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TU441+.8

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    Abstract:

    The train loading is simplified as equivalent rectangular cyclic loading in this paper to investigate the influence of train loading on long-term deformation of soft soil around a shield tunnel. Based on the empirical relation between permeability and compressibility, the governing equation of nonlinear consolidation is established. Then the analytical solutions are derived after the partially sealing lining as boundary condition is considered by introducing a dimensionless relative parameter of soil-lining permeability. The rationality of corresponding analytical solutions is confirmed by the comparison among predictions of ground settlement by presented solution and field data from Shanghai Metro Line No.1. The results show that the increment of ground settlement by train loading is positively correlated with partially sealing condition. The presented solutions provide a reasonable and effective tool for the prediction of long-term ground settlement by the operation of metro way.

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History
  • Received:May 21,2014
  • Revised:
  • Adopted:
  • Online: December 03,2015
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