水电站坝肩岩体风化带划分定量指标的选取与标准

Selection and standards for quantitative index of classification of rock mass weathering zone in the dam shoulder of a hydropower station

摘要: 在平硐洞壁声波测量、全硐段结构面精测工作的基础上,以国标为基本依据,对水电工程岩体风化带定量划分进行了研究,除规范规定的波速比指标外,提出了其它两种定量指标:单元面积节理数和锈染裂隙占有率,并结合某电站坝址区岩体地质环境和风化的总体特征,制定了指标利用原则及划分标准,最后对该水电站坝址区一条剖面上各平硐风化带进行了综合划分。

Abstract: This paper examines the quantitative classification of rock mass weathering zone of hydropower projects based on acoustic measurements of adit tunnel wall and refined measurements of structural surface of the entire adit tunnel according to the Chinese national standards.In addition to ratio of wave indicators stated by specifications,the other two kinds of quantitative indicators are proposed,i.e.,the number of joints per unit area and occupancy ratio of rust stained fissures.The geological roc...