深埋粘性土失水对其物理力学特性影响及机理探讨

Influence on Water Loess of Deep Buried Cohesive Soil on Physical and Mechanical Characteristics and Mechanism Discussion

根据室内土工试验数据,对比深埋可塑粘性土原状样与失水样的物理力学特性,观察到原状样与失水样存在诸多差异。分析土样失水后孔隙比变小、体积缩小的机理,定义了界限失水率。数据表明,在界限失水率前压缩指数变化率随失水率具有明显的线性相关关系;界限失水率后压缩特性趋于稳定。

Based on laboratory test data,the physical and mechanical properties are compared between the undisturbed sample and loss water sample of deep buried cohesive soil,and they have many differences.The mechanism of porosity ratio decrease and volume shrinkage are analyzed after cohesive soil sample loss water;Boundary of loss water rate is defined,there is linear correlation obviously between compression characteristic index rate and loss water rate before boundary of loss water rate,and the compression index become stable after boundary of loss water rate.