中文摘要：

在滑坡滑动面底面倾角较小且上条块对下条块有可能产生拉应力的情况下,采用传递系数法计算的稳定系数偏大,不利于工程安全。提出一种改进的传递系数法并推导出稳定系数表达式,针对传递系数法在滑坡稳定性分析中出现的拉应力,根据莫尔库仑破坏准则,以分块极限静力平衡为基础,修正底面倾角,使传递系数为0,亦即使拉应力无法传递。结合工程实例,将该方法与传统的传递系数法计算结果进行对比分析。结果表明,改进的传递系数法计算过程更合理,计算结果较传统方法偏小,与实际情况吻合,弥补了传统方法的不足,满足工程安全要求。

英文摘要：

The stability coefficient calculated by transmitting coefficient method is too large when the dip angle of bottom slip landslide is small and tensile stress is generated between the upper earth - strip and lower earth - strip. So, an improved trans- mitting coefficients method is suggested and the expression of stability coefficient is deduced. The basic principle is： in the light of tensile stress in landslide analysis and according to Mohr - Coulomb criterion and strip - dividing limit equilibrium, the trans- mitting coefficient is set to 0 by correcting the bottom dip angle, so the tensile stress can not be transmitted. Taking a project as an example, the calculated transmitting coefficients by traditional method and the improved transfer coefficient method are ana- lyzed and compared; the results show that the calculation process of improved transmitting coefficients method is more reasonable, the deviation is smaller and more in line with practical condition, making up for the defects of the traditional method and meeting the requirement of engineering safety.