基于岩体强度指标和有限元法的边坡稳定分析研究  

Stability Analysis of Rock Slope Based on the Method Combin GSI and Finite Element

作　　者：崔孝礼 CUI Xiaoli(Tianjin Survey and Design Croup Co.,Ltd.,Tianjin 300191,China)

机构地区：[1]天津市勘察设计院集团有限公司,天津300191

出　　处：《水利与建筑工程学报》2023年第1期146-150,共5页Journal of Water Resources and Architectural Engineering

摘　　要：为了解决不完备勘探数据条件下地质强度指标法分析精度不足的问题,本研究采用地质强度指标法取代经验系数法设计有限元分析的参数设定方法,解决二者结合后,比较标准偏差率1倍σ值,有限元法结合地质强度指标法对比单纯有限元法,均值提升25.77倍,中位数提升25.70倍;有限元法结合地质强度指标法对比单纯地质强度指标法,均值提升111.03倍,中位数提升110.70倍。研究中将单纯岩体强度指标法与单纯有限元法相结合,形成有限元法结合岩体强度指标法的综合分析方法,发挥了岩体强度指标法对地质参数的整理效果,优化了各地质参数之间的传导关系,使原始参数的设定更佳,使得边坡稳定评价精度得到大幅度提升。In order to solve the problem of insufficient analysis accuracy of geological strength index method under the condition of incomplete exploration data, the geological strength index method is used to replace the empirical coefficient method to design the parameter setting method of finite element analysis. After the combination of the two, the standard deviation rate is compared by one time, and the mean value of finite element method combined with geological strength index method is increased by 25.77 times compared with simple finite element method. The median increased by 25.70 times;Compared with the simple geological strength index method, the mean value of the finite element method combined with the geological strength index method increased by 111.03 times and the median increased by 110.70 times. In this study, the simple rock mass strength index method and the simple finite element method are combined to propose a comprehensive analysis method of finite element method combined with rock mass strength index method, which can be used to sorting the effects of rock mass strength index method on geological parameters, optimize the conduction relationship between geological parameters, make the original parameters more set, and improve the accuracy of slope stability evaluation.

关 键 词：地质强度指标法(GSI) 有限元法 不完备数据 分析精度 边坡稳定性 

分 类 号：TU455[建筑科学—岩土工程]