Numerical Study: Influences of Local Radial Consolidation for Soft Clay


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Abstract

The permeability reduction behavior induced by local consolidation around a prefabricated vertical drain under equal vertical strain condition was investigated by finite element analysis (FEA) using a unit cell model. Taylor's equation was employed to consider the variation of permeability with the void ratio. The results of FEA indicate that at the early stage of consolidation, the ratio of permeability at the cell periphery and adjacent to the drain is about 8 for soft clay. Further, we compared the average degree of consolidation between the results of FEA and the analytical results from Hansbo's solution for radial consolidation. This showed that, without considering the influences of local consolidation, the analytical solution will overestimate the rate of consolidation.

About the authors

Yang Zhou

Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology

Email: fangxu@csu.edu.cn
China, Wuhan

Dibangar Khoteja

Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology

Email: fangxu@csu.edu.cn
China, Wuhan

Fang Xu

School of Civil Engineering, Central South University

Author for correspondence.
Email: fangxu@csu.edu.cn
China, Changsha

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