复杂加载条件下原状黄土结构性定量化参数变化全过程分析

Quantitative Analysis of Soil Structure Variations in Whole Process under Complex Loading Conditions of Intact Loess

在分析土结构性定量化参数研究新进展及释放结构势原理思路的基础上,发现已有研究成果对于描述土体结构性在复杂受荷全过程变化上的局限性,提出了反映原状黄土由初始物理状态到等向应力状态,再到剪切应力状态全过程中结构性参数的描述方法,并通过试验对它们在全过程中变化的合理性、灵敏性与连续性进行了检验。试验结果表明,所提出的结构性参数可以反映它们各自所对应不同条件下土的结构性及其变化,以及复杂加载过程中土结构性变化的连续性过程。

On the basis of-the analysis to the current developments of quantitative soil structure parameters and the thoughts of soil structure potential, it is found that the current structure parameters have their limitations that can not reflect the variations of soil structure in its whole process under complex loading condition. Then, the new parameters, which can describe the soil structure from the initial structure physical state to the isotropic compressive state, and to the shearing stress state, are presented, and the rationality, sensitivity and continuity of them in reflecting the soil structure variations in whole process are verified by a series of soil tests. The test results indicate that the new structure parameters can reflect the soil structure and its variation in their corresponding conditions, and the continuity of soil structure variation in the process of complex loading conditions.