Viscosity effect on consolidation of poroelastic soil due to groundwater table depression |
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| Authors: | Tung-Lin Tsai |
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| Institution: | (1) Department of Civil and Water Resources Engineering, National Chiayi University, 300 Sufe Road, Chiayi, 60004, Taiwan |
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| Abstract: | In this study, the viscosity effect on consolidation of poroelastic soil due to groundwater table depression is examined.
A viscoelastic consolidation numerical model is developed to conduct this examination. By nondimensionalizing the governing
equations the viscosity number that depends on hydraulic conductivity, viscous moduli, and thickness of soil is obtained to
represent the viscosity effect on consolidation of poroelastic soil. The case of clay stratum sandwiched between sandy strata
subjected to sudden and gradual groundwater table depressions is used to investigate the importance of viscosity effect to
poroelastic consolidation. The results show that the displacement and pore water pressure of clay stratum are strongly related
to the viscosity effect. The overestimation of soil displacement will occur if the viscosity effect is neglected. Hence, the
viscosity effect needs to be considered in modeling consolidation of poroelastic soil under groundwater table depression. |
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| Keywords: | Consolidation Viscosity effect Groundwater table depression Poroelastic soil |
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