摘要
高坝洲坝基层状岩体中广泛发育层间剪切帮。本文在野外勘测、室内试验及统计分析的基础上,研究了坝基岩体层间剪切带的分布特征、提出了坝基岩体层间剪切带的类属划分及控制性层间剪切带的确定问题。分别进行了有关层间剪切带化学组成及矿物成分、物理性质和颗分、微结构等测定.研究成果可作为坝基岩体质量评价的基本依据。
The weakenly shearing interlaying zone is widely spread in the layer rock mass in Gaobazhou damsite.Based on the field exploration,laboratory text and statistic analyses the author developed the distribution characteristics of the weakenly shearing interlaying zone.The system classification and the determination of controled weakenly shearing interlaying zone in Gaobazhou damsite rockmass were presented.After TEM and EPR investigation in laboratory,2μm size fraction X-Ray powder diffraction spectroscopy and rockmechanical and chemical experiment,both chemical and mechanical properties of the weakenly shearing interlaying zone in Gaobazhou damsite were illustracted.The analytical results will be the important information in the design and construction of Gaobazhou hydroelectric engineering.
关键词
坝基岩体
层间剪切带
分布特征
rock mass of damsite
weakenly shearing interlaying zone
