基于广义Hoek-Brown强度准则的岩质边坡稳定性分析  

Rock Slope Stability Analysis Based on Generalized Hoek-Brown Strength Criterion

作　　者：陶纬 孙树林[1,2] 李方 胡昭 宗岩 Tao Wei;Sun Shulin;Li Fang;Hu Zhao;Zong Yan(School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu 211100;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, Jiangsu 210098;Jiangsu Province Nanjing Engineering Vocational College, Nanjing, Jiangsu 211135)

机构地区：[1]河海大学地质工程系,南京211100 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [3]江苏省南京工程高等职业学校,南京211135

出　　处：《中国煤炭地质》2019年第5期45-52,共8页Coal Geology of China

基　　金：河海大学水文水资源与水利工程科学国家重点实验室开放研究基金资助项目(2005408911)

摘　　要：为了对带有垂直裂隙的岩质边坡进行稳定性分析,基于极限分析上限法,引入广义Hoek-brown准则对最危险滑移面上的旋转破坏机制和稳定性进行分析,利用拟静力法等手段计算地震力、水压力和均布荷载等不同条件下岩质边坡稳定性的变化,并将外荷载与在滑动面上耗散的能量的比值作为稳定系数,推导出了带有垂直裂隙的岩质边坡的稳定性分析上限解。案例的计算结果表明:基于广义Hoek-Brown强度准则的上限法计算出的结果较极限分析上限法保守,安全系数差距在10%左右;本方法对于有多条裂隙影响的边坡可以分别分析不同裂隙的前部所形成的潜在滑坡体的稳定性并进行对比以选取最危险的滑动块体进行分析。To carry out stability analysis for rock slope with vertical fissures, based on limit analysis upper limit method, introduced generalized Hoek-Brown criterion and carried out analysis for rotating failure mechanism and stability on critical slip surface. Then through means of pseudo-static method etc. analyzed rock slope stability variation under different conditions of seismic force, field pressure and evenly distributed load. In addition, taking the ratio of external load and energy dissipation on slip surface as the stability factor, has deduced upper limit solution of stability analysis for rock slope with vertical fissures. The computed results of case study have shown that the result from generalized Hoek-Brown strength criterion upper limit method is more conservative than the result from limit analysis upper limit method, safety factor difference about 10%. To multiple fissures impacted slopes, the method can respectively analyze different fissure fronts formed potential landslide mass stability and carry out comparison so that to analyze the critical sliding blocks.

关 键 词：岩质边坡 垂直裂隙 稳定分析 极限分析上限法 

分 类 号：P642.22[天文地球—工程地质学]