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An analytical solution of one-dimensional consolidation for soft sensitive soil ground |
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| Authors: | Yun-Min Chen Xiao-Wu Tang Jun Wang |
| Institution: | 1. Department of Civil Engineering, Zhejiang University, Zheda Road 38, Hangzhou 310027, China;2. Department of Civil Engineering, Zhejiang University, Zheda Road 38, Hangzhou 310027, China
Professor;3. Department of Civil Engineering, Zhejiang University, Zheda Road 38, Hangzhou 310027, China Ph.D fellow |
| Abstract: | An analytical solution of one-dimensional consolidation for soft sensitive soil ground is presented. The moving boundary is introduced to indicate the notable change of consolidation behaviour of sensitive soil with the increase of stress level. It is assumed that the soil structure of the upper subsoil gradually destroys downwards with the dissipation of pore pressure, and the coefficient of consolidation as well as the coefficient of permeability of the upper subsoil become small, which hinders the dissipation of pore pressure of the lower subsoil. The consolidation degree curve obtained from the present solution is found to lie between the two curves obtained from Terzaghi one-dimensional consolidation solution with the parameters of the undisturbed soil and the remolded soil. The calculated results provide a new explanation for a general phenomenon in the consolidation of soft sensitive soil ground, as that for high loadings the consolidation is longer than for small ones. It should be pointed out from this study that both the deep mixing method and the long vertical drains methods are effective techniques for improving deep sensitive soil ground. Copyright © 2004 John Wiley & Sons, Ltd. |
| Keywords: | sensitive soil soil structure yield stress consolidation moving boundary |