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针对土坡安全系数数值分析中运用颗粒流重力增加法计算结果偏大的问题,对颗粒流重力增加法进行了改进,即通过降低颗粒摩擦系数,抵消土体抗剪强度因重力增加而提高的不利影响,使计算出的土坡安全系数更加合理。计算结果表明,采用改进的重力增加法计算的土坡安全系数与其他方法计算结果相近;同时结合模型颗粒间的接触和作用力的变化,可以准确确定粘性土坡的滑动面。可见改进的重力增加法有效改善了重力增加法的不足,在计算粘性土坡的安全系数中具有一定的参考价值。
Aiming at the problem that the particle flow gravity increase method is too large in numerical analysis of safety factor of soil slope, the method of gravity increase of particle flow is improved, that is to say, the friction coefficient of particle is reduced to counteract the increase of shear strength of soil due to the increase of gravity Adverse effects make the calculated slope safety factor more reasonable. The calculation results show that the safety factor of soil slope calculated by the improved gravity increase method is similar to other methods. The sliding surface of cohesive soil slope can be accurately determined by the change of contact and force between model particles. It can be seen that the improved gravity increase method effectively improves the deficiency of the gravity increase method and has certain reference value in the calculation of the safety coefficient of the clay slope.