边坡整体稳定性J_RC-J_CS安全系数等效数值解法

周科峰，李宇峙

(长沙理工大学 交通运输工程学院，湖南 长沙，410114)

摘 要：为了将边坡安全系数强度折减计算方法与J_RC-J_CS非线性模型相结合，首先，建立节理粗糙度系数J_RC-节理压缩强度J_CS与等效黏结力c和内摩擦角f的关系；然后，由Mohr-Coulomb强度折减法间接得到J_RC-J_CS模型下边坡的安全系数，并进行参数影响分析。研究结果表明：J_RC-J_CS模型边坡安全系数间接计算方法方便可行，具有实用价值；随着J_RC和J_CS的增大，边坡的安全系数F逐渐增大；F与J_RC和J_CS的关系均呈非线性特征，可通过指数方程进行拟合，并呈高度相关；J_CS越大，F和J_RC关系的非线性特征越明显；J_RC越大，F受J_CS的影响也越大；当J_CS较小时，F受J_CS影响的灵敏度较高。

关键词：边坡；安全系数；J_RC-J_CS模型；强度折减；稳定性；

Equivalent numerical solution for J_RC-J_CS safety factor of whole stability of slope

zhou kefeng, LI Yuzhi

(School of Communication and Transportation Engineering,Changsha University of Science and Technology, Changsha 410114, China)

Abstract:In order to combine the strength reduction calculation method and J_RC-J_CS nonlinear combined model for calculation of the slope safety factor, firstly, the J_RC-J_CS parameters and equivalent cohesion and internal friction angle was established; then, by the Mohr-Coulomb strength reduction method, the slope safety factor based on J_RC-J_CS model was obtained, and parameter influence was analyzed. The results show that the indirect calculation method for safety factor of slope based on J_RC-J_CS model is feasible, and it has practical value. With the increase of fissure roughness coefficient J_RC and fissure compression strength J_CS, the safety factor of the slope F increases gradually. The relationship between J_RC and J_CS is nonlinear. They can be fitted by exponential equation, the results of which are highly correlated. The nonlinear characteristics between F and J_RC is more obvious with the increase of J_CS.F influenced by J_CS is greater with the increase of J_RC. And when J_CS is small, its impact on F is more sensitive.

Key words:slope; safety factor; J_RC-J_CS model; strength reduction; stability