非饱和土中有效应力及有关概念的解说与辨析

Definition and exploration for effective stress and related conception in unsaturated soil

摘要: 对非饱和土中有效应力及其有关的诸如表面张力、基质吸力、湿吸力、本征结构吸力和可变结构吸力进行了系统的解说与辨析,由此提出了同时适应非饱和土和饱和土的统一的有效应力新概念及公式,并且结合特殊性土实例说明了非饱和土的有效应力公式。

Abstract: The effective stress for unsaturated soils was reviewed,and the surface tension,matrix potential,absorbed suction,intrinsic structure suction and variable structure suction were defined and discriminated rigorously.Then a new concept and the unified formula of effective stress for saturated soils as well as for unsaturated soils were proposed.The effective stress formula was also analyzed by use of an actual case.