【摘要】 采用平均土骨架应力代替Bishop的非饱和土的有效应力,基于分析体积变形连续性条件建立了简化的一维非饱和土固结方程,分析计算了非饱和土在固结过程中孔隙压力、平均土骨架应力、饱和度的变化情况。同时建立了耦合水力特性的非饱和土本构模型和屈服方程。算例计算结果表明本文提出的非饱和土简化固结理论和耦合水力特性的非饱和土应力应变本构模型的有效性。更多还原

【Abstract】 Using the average soil skeleton stress to replace Bishop’s effective stress of unsaturated soils,a simplified one dimensional consolidation equation is derived based on volumetric change,water continuity condition.The pore pressure,average soil skeleton stress and degree of saturation during consolidation of unsaturated soils with the equation are analyzed and calculated.According to testing results and the average soil skeleton stress,the constitutive model coupling hydro-mechanics and yield equations of unsaturated soils are presented.Calculation results of cases show that the simplified one dimensional consolidation theory of the unsaturated soils as well as the constitive model are available.更多还原