摘要
皂市水利枢纽坝基岩体主要为石英细砂岩夹软弱夹层。软弱夹层性状由好至差依次分为软岩夹层、破碎夹层、破碎夹泥夹层、泥化夹层等4类。夹层分布连续性较差,多有尖灭、交错出现,局部呈透镜体状,受地下水及层间错动影响性状变化较大。以初设勘察资料为基础,依据坝基岩体风化状态、结构类型、岩体完整性、岩石强度、结构面形态与特征、岩体渗透性等具体指标对坝基岩体进行了工程地质分类,通过统计分析、量化数据确定了大坝建基面。施工开挖后与初设进行了对比,验证了初设阶段所确定的建基面准确,分析手段及方法有效、合理。
The rock mass of dam foundation of Zaoshi Hydroproject is mainly fine silicarenite with soft layers.According to properties,the soft interbedded layer can be classed as soft rock layer,crushed stone layer,crushed stone muddy layer,argillization layer.The interbedded layers are poor in continuity with emergence of multiple thin-outs and cross stratification,local part liking lens and the properties vary comparably large for the influence of underground water distribution and intercalated sliding.Based on sur...
出处
《人民长江》
北大核心
2008年第21期8-10,91,共4页
Yangtze River
关键词
坝基岩体
工程地质分类
弱风化上带
大坝建基面
皂市水利枢纽
rock mass of dam foundation
geological classification
moderately weathered upper zone
dam base surface
Zaoshi Hydroproject