基于质量分级的岩体强度参数统计

 整理长江科学院历年来现场岩石力学试验成果和《岩基抗剪强度参数》一书收集的现场岩体抗剪强度试验资料，从中筛选出岩体抗剪强度试验值样本186个，其中I级岩体7个，II级岩体41个，III级岩体46个，IV级岩体76个，V级岩体16个；分别统计各级别岩体强度参数试验值，提出各级别岩体强度参数试验值取值范围，将此取值范围与《工程岩体分级标准》所给取值范围对比。结果表明，《工程岩体分级标准》所给岩体抗剪强度参数偏低。对40余个典型工程的前期勘测资料进行整理，从中筛选出岩体抗剪强度地质建议值样本110个，其中I级岩体12个，II级岩体22个，III级岩体28个，IV级岩体30个，V级岩体18个；分级进行统计，提出各级别岩体强度参数地质建议值范围，将地质建议值范围与《水利水电工程地质勘察规范》所给取值范围对比，结果表明两者基本一致。研究成果一方面为现有规程规范修订提供依据，另外还能深化工程人员对岩体强度的认识，为今后更合理确定岩体强度参数提供支撑。

STATISTICAL ANALYZING OF ROCK MASSES STRENGTH PARAMETERS BASED ON CLASSIFICATION

186 samples of in situ rock masses strength parameters testing values，which include 7 samples of class I，41 samples of class II，46 samples of class III，76 samples of class IV，16 samples of class V，are screened out based on in-situ testing datum of CRSRI and information collected in Rock Masses Strength Parameters. By statistical analyzing，the scope of strength parameters of each class is given out，and the scopes are compared with the suggesting values in Standard for engineering classification of rock masses. Result indicates that the suggesting values in Standard for Engineering Classification of Rock Masses is much lower and needs to be corrected. 110 samples of geological suggestion values，which include 12 of class I，22 of class II，28 of class III，30 of class IV，18 of class V，are also screened out based on engineering geological datum of above 40 typical projects. The scope of geological suggestion values of each class is then given out，and compared with the values in Code for Engineering Geological Investigation of water resources and hydropower. Result indicates that the two scopes consist with each other well. Researching achievements can not only be helpful in standards or codes modification，but also be meaningful in enhancing the understanding of rock masses strength for engineers.