Geomechanics and Engineering

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Application of a modified structural clay model considering anisotropy to embankment behavior

  • Zhang, Hao (Department of Civil Engineering, Shanghai Jiao Tong University) ;
  • Chen, Qiushi (Glenn Department of Civil Engineering, Clemson University) ;
  • Chen, Jinjian (Department of Civil Engineering, Shanghai Jiao Tong University) ;
  • Wang, Jianhua (Department of Civil Engineering, Shanghai Jiao Tong University)
  • Received : 2016.01.25
  • Accepted : 2017.02.16
  • Published : 2017.07.25
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Abstract

Natural clays exhibit features such as structural and anisotropy. In this work, a constitutive model that is able to replicate these two salient features of natural clays is presented. The proposed model is based on the classical S-CLAY1 model, where the anisotropy of the soil is captured through the initial inclination and rotation of the yield surface. To account for the structural of the soil, the compression curve of the reconstituted soil is taken as the reference. All parameters of the proposed constitutive model have clear physical meanings and can be conveniently determined from conventional triaxial tests. This proposed model has been used to simulate the behavior of soft soil in the undrained triaxial tests and the performance of Murro embankment in terms of settlement and horizontal displacements during embankment construction and consolidation stage. Results of numerical simulations using proposed model have been compared with the field measurement data. The comparisons show that the two features significantly influence the prediction results.

Keywords

References

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