湖北省水利水电工程坝基岩体分类与软岩坝基抗剪强度经验值研究

通过整理分析历年湖北水利水电工程岩体力学试验成果及地质资料,编写了工程实例,按规范要求复核岩体力学指标建议值和工程岩体分类,汇总分析了各类坝基岩体分类对应的抗剪强度范围值。研究了坝基岩体分类的影响因素和软岩的特殊性,参考规范对经验值进行适当调整,初步提出了湖北的水利水电工程坝基岩体分类与软岩抗剪强度经验值,可供中小型工程类比取值时借鉴。

Study on dam foundation rock mass classification and shear strength empirical value of soft rock dam foundation for water conservancy and hydropower project in Hubei Province

Through the collation and analysis made on the the rock mass mechanical experiment achievements and the geological data for the water conservancy and hydropower project in Hubei Province over the years，the relevant engineering cases are compiled，and then the suggested values for the rock mass mechanical indexes and engineering rock mass classification are checked according to the requirement from the related ctriteria，while the values of the corresponding shear strength range to the rock mass classes of all types of dam foundations are summerized and analyzed as well. Furthermore，the impacting factors of the dam foundation rock mass classification and the particularity of soft rock are studied and the empirical values are adaptably adjusted with the reference of the criteria concerned，and thus the dam rock mass classification and the shear strength empirical value of soft rock for the water conservancy and hydropower project in Hubei Province are preliminarily proposed，so as to provide references for the analogue and value-taking made for those medium and small sized projects concerned.