Review of fundamental principles in modelling unsaturated soil behaviour
Review of fundamental principles in modelling unsaturated soil behaviour
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DOI：
10.1016/j.compgeo.2011.05.002
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发表时间：
2011-09
影响因子：
5.3
通讯作者：
D. Sheng
中科院分区：
文献类型：
--
作者：
D. Sheng
非饱和土是土壤的一种状态。所有土壤都可以被水部分饱和。因此，土壤本构模型应该理想地代表整个可能的孔隙压力和应力值范围内的土壤行为，并允许在这些范围内的任意应力和水力路径。过去二十年左右的时间里，非饱和土壤行为建模取得了重大进展。本文对非饱和土本构模型进行了综述。特别是，它侧重于控制体积变化、剪切强度、屈服应力、保水性和水力耦合的基本原理。这些原理的替代形式在其对实验数据的预测能力、这些原理之间的一致性以及饱和与不饱和状态之间的连续性方面受到严格审查。
An unsaturated soil is a state of the soil. All soils can be partially saturated with water. Therefore, constitutive models for soils should ideally represent the soil behaviour over entire ranges of possible pore pressure and stress values and allow arbitrary stress and hydraulic paths within these ranges. The last two decades or so have seen significant advances in modelling unsaturated soil behaviour. This paper presents a review of constitutive models for unsaturated soils. In particular, it focuses on the fundamental principles that govern the volume change, shear strength, yield stress, water retention and hydro-mechanical coupling. Alternative forms of these principles are critically examined in terms of their predictive capacity for experimental data, the consistency between these principles and the continuity between saturated and unsaturated states.