基于扰动状态概念模型的饱和软粘土力学特性

基于扰动状态概念(DSC)理论，定义饱和软粘土的相对完整状态、完全调整状态及扰动函数，建立了饱和软粘土应力一应变关系的DSC模型．通过三轴固结不排水剪切试验，对上海地区典型软粘土的力学特性进行了分析，得到了软粘土在不同围压下的轴向应力、应变和孔压等参数之间的关系，并应用试验结果验证了饱和软粘土的DSC本构模型．结果表明，理论与试验结果较为吻合．

Disturbed State Concept Model for Studying on Mechanical Characteristics of Saturated Cohesive Soils

Based on the disturbed state concept (DSC) theory, a new constitutive model of saturated soft cohesive soil was presented through defining relative intact state, fully adjusted state and disturbed function for the saturated cohesive soil. Analyzing the mechanical characteristics of the typical saturated cohesive soil of Shanghai by consolidated-undrained triaxial shear tests, the relationship among axial stress, axial train and pore water pressure of the soil was obtained under different confining pressure. The constitutive model of cohesive soil based on the DSC theory was verified by the test results. The research shows that the theoretical analysis is in good agreement with the results of tests.