Analysis for nonlinear finite strain consolidation of soft clay equipped with vertical drains

H. Choi, Y. Ahn, T. Kwak, J. Lim

Research output: Contribution to conferencePaperpeer-review

Abstract

Vertical drains are commonly used to accelerate the consolidation process of soft soils, such as dredged materials, because they additionally provide a radial drainage path in a deep soil deposit. In practice, vertical drains are commonly installed in the process of self-weight consolidation of a dredged soil deposit. The absence of an appropriate analysis tool for this situation makes it substantially difficult to estimate selfweight consolidation behavior considering both vertical and radial drainage. In this paper, two new methods have been proposed to take into account both vertical and radial drainage conditions during nonlinear finite strain self-weight consolidation of dredged soil deposits. For one-dimensional nonlinear finite strain consolidation in the vertical direction, the simplified Morris's analytical solution (2002) and the PSDDF analysis are adopted. On the other hand, to consider the radial drainage, the Barron's vertical drain theory (1948) is used. The overall average degree of self-weight consolidation of the dredged soil is estimated using the Carillo's formula (1942), in which both vertical and radial drainage are considered. A series of large-scale self-weight consolidation experiments being equipped with a vertical drain has been carried out to verify the analysis method proposed in this paper. The results of the new analysis methods are generally in agreement with those of the experiments.

Original languageEnglish
Publication statusPublished - 2011
Event14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong, China
Duration: 2011 May 232011 May 27

Other

Other14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011
CountryChina
CityHong Kong
Period11/5/2311/5/27

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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