Hoek-Brown准则在软岩～中硬岩坝基岩体力学指标参数选取中的应用——以陕西省延安市龙安水利枢纽工程为例  

Application of Hoek-Brown Criterion in Selection of Mechanical Parameters for Rock Mass in Soft Rock to Medium Hard Rock Dam Foundation——Taking Long’an Water Conservancy Project in Yan’an City, Shaanxi Province as an Example

作　　者：李鹏[1] LI Peng(Shaanxi Institute of Water Resources and Electric Power Investigation and Design, Xi'an 710001,China)

机构地区：[1]陕西省水利电力勘测设计研究院

出　　处：《西北水电》2019年第4期16-20,共5页Northwest Hydropower

基　　金：陕西省水利科技项目(编号2018slkj-14)

摘　　要：通过基于Hoek-Brown准则的地质强度指标GSI,结合岩体质量分类,对陕西省延安市龙安水利枢纽坝基岩体力学参数进行了分析研究。结果表明,经过修正后的GSI指标与岩体质量分类确定的岩体质量等级经验值基本吻合,GSI可应用于砂泥岩互层地区岩体力学参数的确定。该方法可在原位试验资料不足的情况下,为砂泥岩层地区力学参数的选取提供一定的参考价值。By geological strength index GSI based on the Hoek-Brown criterion, combined with rock mass classification, the mechanical parameters of the rock mass of the Long'an Water Conservancy Project in Yan'an City, Shaanxi Province are analyzed and studied. The results show that the modified GSI index is basically consistent with the empirical value of rock mass quality grade determined by rock mass classification. GSI can be applied to the determination of rock mass mechanical parameters in sand-shale interbedded areas. Under the condition of insufficient in-situ test data, the method can provide a certain reference for the selection of mechanical parameters in sand-shale interbedded areas.

关 键 词：岩体力学参数 地质强度指标 岩体质量分类 

分 类 号：TV223.1[水利工程—水工结构工程]