改进的传递系数法  

Improved Transfer Coefficient Method

作　　者：童广勤[1,2] 苏爱军[3] 

机构地区：[1]中国地质大学(武汉)研究生院 [2]水利部长江勘测技术研究所,武汉430011 [3]中国地质大学(武汉)三峡中心,武汉430074

出　　处：《长江科学院院报》2010年第6期43-48,共6页Journal of Changjiang River Scientific Research Institute

摘　　要：根据刚体极限平衡理论,以准超载法为基础,推导了改进的传递系数法的递推公式及累计求和表达式。论证了传递系数法仅仅是滑坡所有条块间作用力均不小0时,改进传递系数法特解的近似解;在此条件下,可用传递系数法替代改进的传递系数法求解滑坡稳定系数。给定安全系数后,在滑坡推力较大时(如1 000 kN/m),用传递系数法替代改进的传递系数法基本可行;其他条件下,尤其是当滑坡所有条块间出现拉应力时,用传递系数法计算滑坡稳定系数和滑坡推力均存在安全隐患。In this paper,according to the limit equilibrium theory of rigid body,the recursion formula and the cumulative summation formula of improved transfer coefficient method were created,based on the pseudo-overloading method.It was demonstrated that the transfer coefficient method is the approximate solution of especial solution of the improved transfer coefficient method,while the force of inter-slice is more than zero or equal to zero.In this case,it is feasible to calculate the stability coefficient using the improved transfer coefficient method instead of the transfer coefficient method.When the factor of safety is given,if the landslide thrust is quite greater（such as 1 000 kN/m）,it is basically feasible to use the improved transfer coefficient method instead of the transfer coefficient method.In other cases,there exists some risk of safety by using transfer coefficient method to calculate landslide stability coefficient and landslide thrust,particularly when tensile stresses arise among all landslide slices.On the premise in compliance with the existing norms,the improved transfer coefficient method replacing the transfer coefficient method is imperative.

关 键 词：滑坡 稳定性评价 传递系数法 

分 类 号：P642.22[天文地球—工程地质学]