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对广西靖西取得的3种红粘土原状土样以及室内制备的重塑土样进行单轴压缩试验和三轴剪切试验(包括浸水饱和后的试验),其目的是研究静力荷载作用下红粘土的固结变形和强度特征。研究表明,在较大的压缩应力作用下,土样仍有较大的孔隙比;红粘土的破坏面为一个曲面变化形态,试样首先沿较为软弱的不规则面发生,然后才形成贯通的滑动面;尽管土样在破坏时出现明显的剪切破坏面(表现为一定的脆性破坏特征),但其应力应变关系呈现应变硬化的特点,表明红粘土有很强的粘滞特性。
Three kinds of red clay undisturbed soil samples obtained from Jingxi, Guangxi Province, as well as indoor prepared remolded soil samples were subjected to uniaxial compression tests and triaxial shear tests (including tests after saturated water immersion) with the purpose of studying the effect of static load Consolidation deformation and strength characteristics of red clay. The results show that the larger the compressive stress, the larger the void ratio of soil samples; the red clay damage surface is a curved surface morphology, the sample first along the more weak irregular surface occurred, and then only through Sliding surface. Although soil samples show obvious shear failure surface (which is characterized by some brittle failure), their stress-strain relationship shows the characteristics of strain hardening, indicating that the clay has strong viscous properties.