標題: Effects of soil parameter variation and grid deformation on the numerical simulation of aquitard consolidation
作者: Tsai, Tung-Lin
Peng, Chen-Chang
Wang, Xi-Jun
土木工程學系
Department of Civil Engineering
關鍵字: Grid deformation;Soil parameter variation;Aquitard consolidation;Numerical simulation
公開日期: 1-Aug-2018
摘要: Changes in soil parameters such as saturated unit weight (body force), hydraulic conductivity, and elastic modulus must be considered for simulating aquitard consolidation. In addition to changes in soil parameters, grid intervals change the subsequent soil deformation in such simulations. This study incorporated and examined the effects of both the grid deformation and soil parameter variation on the numerical simulation of aquitard consolidation caused by hydraulic head decline in a multilayered aquifer system. According to the nondimensional analysis, the deformation number can be regarded as a dimensionless parameter for assessing whether the grid deformation and soil parameter variation affect this simulation. The results revealed that when the deformation number exceeds 0.01 (i.e., when the aquitard is thick or soft), both the grid deformation and soil parameter variation must be simultaneously considered to increase accuracy. Aquitard consolidation was always overestimated when only the soil parameter variation was considered. However, when only the grid deformation was considered, the aquitard consolidation was either overestimated or underestimated depending on whether the influence of the change in the body force was more substantial than that of the elastic modulus.
URI: http://dx.doi.org/10.3319/TAO.2017.11.01.01
http://hdl.handle.net/11536/148030
ISSN: 1017-0839
DOI: 10.3319/TAO.2017.11.01.01
期刊: TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
Volume: 29
起始頁: 455
結束頁: 464
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