碱处理红黏土应力应变关系研究

以碱处理前、后红黏土在CTC(增p)、TC(等p)、RTC(减p)三种模拟工况下的三轴试验数据为基础,结合邓肯-张模型和广义强度发挥面理论(Extend SMP)研究土样的应力应变关系.结果表明,基于邓肯-张模型,碱处理前、后红黏土试样的ε1/(σ1-σ3)～ε1关系曲线并不是简单的线性关系,简单邓肯-张模型下分析的红...

Study on Stress-strain Relationship of Alkali-Treated Red Clay

Based on the triaxial test data of three different working conditions of CTC (increasing p), TC (equivalent p), and RTC (decreasing p) before and after alkali treatment and combined with Duncan-Chang model and generalized strength, the theory (Extend SMP) studies the stress-strain relationship of soil samples. The results show that based on the Duncan-Chang model, the ε₁/ (σ₁-σ₃)~ε₁ relationship curve of red clay samples before and after alkali treatment is not a simple linear relationship. The relationship between stress and strain under the simple Duncan-Chang model may not apply. Based on the generalized strength surface theory, the stress ratio and stress increment ratio of the sample are simple linear relationships. The stress ratio and stress ratio are a curve relationship between the front and back sections being gentle and the middle being steep, The relationship between stress ratio and axial strain has high similarity with the change of strain curve. The rapid increase first and then the slow increase curve finally stabilize, and the stress ratio of red clay on the Extend SMP surface after alkali treatment has a significant peak.