基于质量分级的岩体变形模量统计  

STATISTICAL ANALYSIS OF DEFORMATION MODULI OF ROCK MASSES BASED ON QUALITY CLASSIFICATION

作　　者：张宜虎[1] 周火明[1] 邬爱清[1] 钟作武[1] 秦磊[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《岩石力学与工程学报》2011年第3期486-492,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：长江科学院中央级公益性科研院所基本科研业务费项目"基于生态环境保护的岩体质量分级及锚固研究"(YWF0910);"十一五"国家科技支撑计划项目(2008BAB29B01-1)

摘　　要：收集筛选920个现场岩体变形模量试验值样本,按质量级别分别统计,据此给出各级别岩体变形模量试验值范围,将统计结果与《工程岩体分级标准》(GB50218-94)取值对比,为标准修订提出建议。收集114个岩体变形模量地质建议值样本,也按级别分别统计,据此给出各级别岩体变形模量地质建议值范围,将地质建议值统计结果与《水利水电工程地质勘察规范》(GB50487-2008)取值对比。统计及对比结果表明:《工程岩体分级标准》(GB50218-94)中,II,III级岩体变形模量分界线量值偏高;针对IV,V级岩体变形模量分界线,《工程岩体分级标准》(GB50218-94)给出的试验值界线与《水利水电工程地质勘察规范》(GB50487-2008)给出的地质建议值界线不协调;下阶段修编过程中需对以上问题加以关注。为增加《工程岩体分级标准》(GB50218-94)实用性,建议将各级别岩体变形模量地质建议值取值范围也纳入其中。The parameters of each rock mass class provided in Standard for engineering classification of rock masses（GB50218-94） have little relation with rock masses classification and need to be verified.920 samples of in-situ deformation testing values were collected and statistically analyzed class by class;then the scope of deformation modulus of each class was given;and the statistical values were compared with the values in GB50218-94.Except for in-situ testing values,geological suggestion values of rock masses deformation moduli were also collected and analyzed class by class;and the statistical results were compared with the suggestion values in Code for engineering geological investigation of water resources and hydropower（GB50487-2008）.Researching results indicate that the boundary between class II and III in GB50218-94 needs to be reduced;and the boundary between class IV and V in GB50218-94 is inconsistent with the value in GB50487-2008.It＇s suggested that the geological suggestion values also should be included in GB50218-94 to improve its practicability.

关 键 词：岩石力学 岩体分级 变形模量 试验值 地质建议值 统计分析 

分 类 号：TU45[建筑科学—岩土工程]