改进的水电边坡岩体稳定性分级法  

Modified hydropower slope rock mass stability rating system

作　　者：张菊连[1] 沈明荣[1,2] 

机构地区：[1]同济大学土木学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《水文地质工程地质》2011年第2期39-45,51,共8页Hydrogeology & Engineering Geology

基　　金：上海市重点学科建设资助项目(B308)

摘　　要：为克服现有基于边坡岩体分级SMR法的修正分级法存在的缺陷,采用较为合理的修正模型,结合36个水电工程边坡,提出了改进的水电边坡岩体分级M-CSMR法。该法使用边坡类型系数替代开挖修正得分,同时考虑了开挖、水流冲刷及掏蚀作用的影响;将坡高对边坡岩体稳定性的影响引入分级中,给出坡高分级及评分原则;对SMR法中各指标权值重新进行调整。与岩体分级RMR法、边坡岩体分级SMR法及水电边坡岩体分级CSMR法进行了比较,结果表明M-CSMR分级法与经验评分最为接近,预测结果最好,最大绝对误差、平均绝对误差及剩余标准差均最小,因此M-CSMR是一种更优的水电边坡岩体分级方法。In order to overcome the defects in the existing modified mass rating system originated from slope rock mass rating（SMR） system,a more rational correction model was adopted to establish a modified Chinese hydropower slope rock mass rating（M-CSMR） system based on thirty six hydropower slopes.The coefficients of slope types were used to take the place of excavation factor to comprehensively take into account the influences of excavation,water erosion and scour on rock mass stability;the influence of slope height on rock mass stability was introduced into this system,and its grading and rating principle were given;the weights of factors in the SMR system were re-adjusted.Compared with rock mass rating（RMR） system,slope rock mass rating（SMR） system and Chinese slope rock mass rating（CSMR） system,the M-CSMR system’s evaluation results are closer to the empirical rating based on safety of factor,the prediction results are better,the maximum absolute error,the mean absolute error and the residual standard deviation are all smaller,thus M-CSMR is a better hydropower slope rock mass rating system.

关 键 词：边坡岩体分级 边坡类型 坡高分级 M-CSMR法 

分 类 号：TU457[建筑科学—岩土工程]