基于GSI的露天矿边坡岩体抗剪强度与原位测试抗剪强度对比研究  

Comparative study on shearing strength parameters of open pit mine rock mass and in situ testbased on GSI

作　　者：吴占廷 鲁旭荣[2] WU Zhan-ting;LU Xu-rong(Northwest Integrated Survey and Design Institute,Guiyang,Guizhou 550001;Kaili College,Kaili,Guizhou 556011)

机构地区：[1]西北综合勘察设计研究院,贵州贵阳550001 [2]凯里学院,贵州凯里556011

出　　处：《地下水》2023年第4期164-167,共4页Ground water

基　　金：黔东南州科技计划项目(黔东南科合J字[2022]65号);凯里学院2022年校级“金课”(一流课程)建设项目(JK202206)。

摘　　要：岩体抗剪强度参数的选取对边坡稳定性设计研究有着重大的影响,Hoek和Brown等提出基于地质强度指标GSI的Hoek-Brown强度准则并不断加以完善其理论,使其在工程中得到了广泛的应用,使Hoek-Brown强度准则成为国内研究露天矿边坡岩体的抗剪强度参数的主要方法之一。在实际工程中,基于GSI的Hoek-Brown强度准则岩体抗剪强度参数常常遭到咨询工程师的质疑,基于RMR及岩体钻孔波速确定的GSI值,两者具有良好的相关性,使用钻孔波速计算GSI更加便捷准确。通过基于GSI的Hoek-Brown强度准则计算岩体的抗剪参数与现场原位测试抗剪强度参数对比分析,探讨两者之间的差异,为岩体原位剪切试验提供指导。The selection of rock mass shear strength parameters has a significant impact on the design and research of slope stability.Hoek and Brown proposed the Hoek Brown strength criterion based on the geological strength index GSI and constantly improved its theory,which has been widely used in engineering,making Hoek Brown strength criterion one of the main methods to study the shear strength parameters of open-pit mine slope rock mass in China.In practical engineering,the rock mass shear strength parameters based on the Hoek-Brown strength criterion of GSI are often questioned by the consulting engineers.The GSI value determined based on the RMR and the rock mass borehole wave velocity has a good correlation,and the calculation of GSI using the borehole wave velocity is more convenient and accurate.Through the comparative analysis between the shear strength parameters calculated by Hoek Brown strength criterion based on GSI and the in-situ test shear strength parameters,the differences between them are discussed to provide guidance for the in-situ shear test of rock mass.

关 键 词：GSI HOEK-BROWN强度准则 波速 抗剪强度参数 原位试验 

分 类 号：TU459.2[建筑科学—岩土工程]