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Advances in Civil Engineering Volume 2018 ,2018-09-20
Analysis of Large-Strain Consolidation Behavior of Soil with High Water Content in Consideration of Self-Weight
Research Article
Yupeng Cao 1 Jian Yang 1 Guizhong Xu 2 Jianwen Xu 1
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DOI:10.1155/2018/6240960
Received 2018-04-20, accepted for publication 2018-08-13, Published 2018-08-13
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摘要

Based on the axisymmetric large-strain consolidation (ALSC) model with the void ratio as the variable under equal strain condition, difference schemes of model’s equation, initial condition, and boundary condition were given. Taking phosphatic clay in Florida as a research object, the consolidation behaviors of soil with high water content by axisymmetric large-strain theory and one-dimensional large-strain theory were analyzed. The effect of different kinds of consolidation theories and self-weight stress on an average degree of consolidation was evaluated. The development of the void ratio and excess pore water pressure along the soil layer was clarified. The results show that the theoretical value of Terzaghi’s consolidation degree is always less than that of ALSC (Us, the average degree of consolidation defined by strain)-vertical drainage in the consolidation process. Terzaghi’s solution overestimates the dissipation rate of excess pore water pressure during the earlier consolidation period but underestimates it during the later consolidation period. The degree of consolidation calculated by Hansbo develops faster than ALSC (Up, the average degree of consolidation defined by stress)-radial drainage, but slower than ALSC (Us)-radial drainage. In the ALSC model, Us is always been faster than Up. The effect of self-weight on the consolidation degree of axisymmetric large-strain consolidation theory is relatively small (maximum error is less than 16%), while it can accelerate the consolidation rate of soil in one-dimensional large-strain consolidation theory largely. When only the vertical drainage occurs, the consolidation rate in the middle of the soil is obviously lagging the upper and lower parts, while the radial drainage can reduce the void ratio and the excess pore water pressure along the soil layer uniformly and more rapidly.

授权许可

Copyright © 2018 Yupeng Cao et al. 2018
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.

通讯作者

Yupeng Cao.College of Transportation, Shandong University of Science and Technology, No. 579, Qianwan’gang Road, Qingdao, Shandong 266590, China, sdust.edu.cn.paradise456917@163.com

推荐引用方式

Yupeng Cao,Jian Yang,Guizhong Xu,Jianwen Xu. Analysis of Large-Strain Consolidation Behavior of Soil with High Water Content in Consideration of Self-Weight. Advances in Civil Engineering ,Vol.2018(2018)

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