One-dimensional consolidation in unsaturated soils under cyclic loading

Wei Cheng Lo, Garrison Sposito, Jhe Wei Lee, Hsiuhua Chu

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

The one-dimensional consolidation model of poroelasticity of Lo et al. (2014) for an unsaturated soil under constant loading is generalized to include an arbitrary time-dependent loading. A closed-form solution for the pore water and air pressures along with the total settlement is derived by employing a Fourier series representation in the spatial domain and a Laplace transformation in the time domain. This solution is illustrated for the important example of a fully-permeable soil cylinder with an undrained initial condition acted upon by a periodic stress. Our results indicate that, in terms of a dimensionless time scale, the transient solution decays to zero most slowly in a water-saturated soil, whereas for an unsaturated soil, the time for the transient solution to die out is inversely proportional to the initial water saturation. The generalization presented here shows that the diffusion time scale for pore water in an unsaturated soil is orders of magnitude greater than that in a water-saturated soil, mainly because of the much smaller hydraulic conductivity of the former.

原文English
頁(從 - 到)122-137
頁數16
期刊Advances in Water Resources
91
DOIs
出版狀態Published - 2016 5月 1

All Science Journal Classification (ASJC) codes

  • 水科學與技術

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