Modelling the effect of initial density on soil-water characteristic curves
Modelling the effect of initial density on soil-water characteristic curves
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DOI：
10.1680/geot.10.p.120
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发表时间：
2012-08
期刊：
影响因子：
5.8
通讯作者：
Annan Zhou;D. Sheng;J. Carter
中科院分区：
文献类型：
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作者：
Annan Zhou;D. Sheng;J. Carter
本文提出了一种简单的方法来量化土壤初始密度对非饱和土的土-水特征曲线（SWCC）的影响。这种方法是基于饱和度和初始孔隙比之间的增量关系，满足三相多孔材料的内在约束。增量关系可以纳入现有的SWCC方程来模拟变形土壤的持水行为。仅引入一个附加参数，该参数可方便地通过常规保水试验进行标定。利用该方法可以得到同一土在不同初始孔隙比下的SWCC。所提出的方法进行了验证，从压实和再造土干燥试验的实验数据。
This paper presents a simple approach to quantify the effect of initial soil density on the soil-water characteristic curve (SWCC) of unsaturated soils. This approach is based on an incremental relationship between the degree of saturation and the initial void ratio, which satisfies the intrinsic constraints for three-phase porous materials. The incremental relationship can be incorporated into existing SWCC equations to model the water retention behaviour for deformable soils. Only one additional parameter is introduced, which can be conveniently calibrated by way of conventional water retention tests. The SWCCs for the same soil at different initial void ratios can be found using the proposed approach. The proposed approach is validated against experimental data from drying tests for both compacted and reconstituted soils.