摘要
为了将边坡安全系数强度折减计算方法与JRC-JCS非线性模型相结合,首先,建立节理粗糙度系数JRC节理压缩强度JCS与等效黏结力c和内摩擦角的关系;然后,由Mohr-Coulomb强度折减法间接得到JRC JCS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:JRC-JCS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JRC和JCS的增大,边坡的安全系数F逐渐增大;F与JRC和JCS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;JCS越大,F和JRC关系的非线性特征越明显;JRC越大,F受JCS的影响也越大;当JCS较小时,F受JCS影响的灵敏度较高。
In order to combine the strength reduction calculation method and JRC-JCS nonlinear combined model for calculation of the slope safety factor, firstly, the JRC--Jcs parameters and equivalent cohesion and internal friction angle was established; then, by the Mohr-Coulomb strength reduction method, the slope safety factor based on JRC--Jcs model was obtained, and parameter influence was analyzed. The results show that the indirect calculation method for safety factor of slope based on JRC--Jcs model is feasible, and it has practical value. With the increase of fissure roughness coefficient JRc and fissure compression strength Jcs, the safety factor of the slope F increases gradually. The relationship between JRC and Jcs is nonlinear. They can be fitted by exponential equation, the results of which are highly correlated. The nonlinear characteristics between F and JRC is more obvious with the increase of Jcs.F influenced by Jcs is greater with the increase of JRc. And when Jcs is small, its impact on F is more sensitive.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期1666-1671,共6页
Journal of Central South University:Science and Technology
基金
湖南省自然科学基金资助项目(11JJ4043)
湖南省科技计划项目(2012FJ4127)
