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为了定量分析不同的滑带土颗粒级配情况下粘粒含量及含水量对粘聚力c和内摩擦角φ等强度参数的影响机制及变化规律,利用卡拉水电站田三滑坡体滑带土,进行了不同级配、不同粘粒含量及不同含水量组合的多组直剪试验方法,以揭示岩质边坡结构面中粘土矿物含量及含水量的变化对边坡岩体强度参数c、φ影响机制及变化规律。试验结果表明:当含水量不大于塑限时,c值随粘土矿物含量的增加而呈非线性增大,当含水量大于塑限时,c值随着粘土矿物的增加,先减小后增大,在粘粒含量为35%时c值最低;φ值随着粘粒含量的增加而减小,且在粘粒含量小于25%时φ值减小的速度较快,当粘粒含量大于25%时减小的速度减缓;并采用粒子群优化算法对试验成果作以解析。
In order to quantitatively analyze the influence mechanism and variation regularity of clay content and water content on the strength parameters such as cohesion c and internal friction angle φ under different graded conditions of slip zone soil, A series of direct shear tests with different gradation, different clay content and different water content were conducted to reveal the influence of the change of clay mineral content and water content on the rock mass slope parameters on the rock mass strength parameters c, φ Influence mechanism and change rule. The experimental results show that when the water content is not greater than the plastic limit, the c value increases nonlinearly with the increase of clay mineral content. When the water content is greater than the plastic limit, the c value decreases first and then increases with the increase of clay minerals, When the clay content is 35%, the c value is the lowest. The value of φ decreases with the increase of clay content, and the value of φ decreases more rapidly when the clay content is less than 25%. When the clay content is more than 25% Reduce the speed of slowing down; and using particle swarm optimization algorithm to analyze the test results.