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Mathematical Problems in Engineering
Volume 2014, Article ID 979380, 8 pages
http://dx.doi.org/10.1155/2014/979380
Research Article

Nonlinear Finite Strain Consolidation Analysis with Secondary Consolidation Behavior

1Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2School of Civil Engineering & Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
3MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China
4School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China

Received 8 January 2014; Accepted 25 March 2014; Published 17 April 2014

Academic Editor: Gianluca Ranzi

Copyright © 2014 Jieqing Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper aims to analyze nonlinear finite strain consolidation with secondary consolidation behavior. On the basis of some assumptions about the secondary consolidation behavior, the continuity equation of pore water in Gibson’s consolidation theory is modified. Taking the nonlinear compressibility and nonlinear permeability of soils into consideration, the governing equation for finite strain consolidation analysis is derived. Based on the experimental data of Hangzhou soft clay samples, the new governing equation is solved with the finite element method. Afterwards, the calculation results of this new method and other two methods are compared. It can be found that Gibson’s method may underestimate the excess pore water pressure during primary consolidation. The new method which takes the secondary consolidation behavior, the nonlinear compressibility, and nonlinear permeability of soils into consideration can precisely estimate the settlement rate and the final settlement of Hangzhou soft clay sample.