摘要
国外某高砾石土心墙堆石坝坝基覆盖层深厚、层次结构复杂,基础存在地震液化、抗滑、坝基渗漏等问题。文中针对大坝挡水水头高、坝基材料渗透性强的特点,在设计过程中对单排防渗墙、双排防渗墙、防渗墙结合水平铺盖等防渗形式组合进行了技术比选,最终采用双排防渗墙作为该工程坝基最佳防渗方案。该方案合理且可靠,计算成果可为深厚覆盖层地区的坝基防渗设计提供一定的参考。
A high gravel earth core rockfill dam in a foreign country has deep covering layer and complex hierarchical structure,and the foundation has some problems such as earthquake liquefaction,anti-skid and seepage of the dam foundation.In view of the characteristics of high retaining head and strong permeability of dam foundation material,the technical comparison of the combination of single row cutoff wall,double row cutoff wall and cutoff wall combined with horizontal bedding is carried out in the design process.Finally,the double row cutoff wall is adopted as the best anti-seepage scheme of the dam foundation.The scheme is reasonable and reliable,and the calculation results can provide some reference for the anti-seepage design of dam foundation in areas with deep covering layer.
出处
《东北水利水电》
2023年第5期7-9,13,71,共5页
Water Resources & Hydropower of Northeast China
关键词
高砾石土心墙堆石坝
深厚覆盖层
坝基防渗
high gravel earth core rockfill dam
deep covering layer
anti-seepage of dam foundation
