江边水电站拦河坝基础覆盖层防渗研究  

Study on seepage control for overburden of Jiangbian hydropower station

作　　者：陆欣[1] 黄维[1] 史彬[1] 

机构地区：[1]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《大坝与安全》2013年第2期1-3,共3页Dam & Safety

摘　　要：江边水电站拦河坝基础覆盖层深厚,最大深度约110m。基础覆盖层分层明显,床质多为第四系冲洪积、冲湖积、崩坡积地层,属中等-强透水层,各层的渗透性差异较大,渗透稳定性较差。为确保防渗结构安全、可靠、经济合理,在对覆盖层的渗透特性进行研究的基础上,拟定了多个处理方案进行比选,最终选择了防渗墙插入砂质粉土层5m的方案。The dam foundation of Jiangbian hydropower station is composed of deep riverbed overbur- den. Its maximum depth is about 110 m. The layers of the overburden are obvious. The materials are mostly Quaternary alluvial-diluvial and colluvium formation. They are highly permeable. Permeability of the layers are quite different and their penetration are n. ot stable. In order to ensure the seepage con- trol structure safe, reliable and economical, based on study of the permeability of the covering layer, sev- eral treatment options for selection have been developed. By comparison, a cut-off wall 5-m deep into the sandy silt layer is adopted.

关 键 词：江边水电站 覆盖层 防渗处理 防渗墙 

分 类 号：TV543.8[水利工程—水利水电工程]