论文部分内容阅读
对击实后的红粘土土样在饱和前、饱和后进行了三轴剪切试验和无侧限抗压强度试验,研究其抗剪强度特征的变化规律。针对原状土样和重塑土样在脱湿或加湿过程中无侧限抗压强度的变化进行了研究。研究表明,在脱湿过程中,土体的抗剪强度逐渐增大,而且原状土的应力应变关系曲线一般呈应变软化的特点,而重塑土的应力应变关系曲线则一般呈现硬化的特点;在加湿过程中,原状土无侧限抗压强度峰值并不明显。分析表明,脱湿过程或加湿过程中土样强度随含水率的变化是显著的。
Triaxial shear tests and unconfined compressive strength tests were conducted before and after saturation for saturated red clay samples. The variation of shear strength characteristics was studied. The change of unconfined compressive strength of undisturbed soil samples and remolded soil samples during dehumidification or humidification was studied. The results show that the shear strength of soil increases gradually during the process of desiccation, and the stress-strain curve of undisturbed soil shows the characteristics of strain softening, while the stress-strain curve of remolded soil generally shows the characteristics of hardening. During humidification, the unconfined compressive strength of undisturbed soil peak is not obvious. The analysis shows that the change of soil strength with moisture content in the process of dehumidification or humidification is significant.