非饱和土的有效应力原理与弹塑性模型研究

从孔隙水的保存状态出发，利用向后雄二的吸力效果理论，将饱和土的弹塑模型推广到非饱和土，推广方法概念清楚，适用性广，新引入的试验参数少且能由三轴试验测定，是否可行还能通过三轴试验加以检验，具有较大的实用性。

Study on Effective Stress Principle and Elastoplastic Model for Unsaturated Soil

Based on the investigation of pore water states, by use of Kohgo's suction feature theory, suction is divided into two parts, i.e. the effective stress and the inner stress, and it is found that the inner stress only causes plastic deformation. A model for calculation of the two kinds of stresses by the characteristic curve of water content is introduced, and the elastoplastic model for saturated soil is extended for unsaturated soil. The present method is of clear concept and good suitability, and it needs few test parameters, which can be determined by triaxial tests. The feasibility of the method can be verified by triaxial tests.