峡谷地区200m级高面板堆石坝筑坝技术研究及应用

针对已建的2座200 m级高面板堆石坝出现的坝体变形大、面板裂缝多、渗漏量偏大等问题,结合洪家渡坝河谷狭窄且不对称的特点,开展了筑坝技术研究,取得了坝体变形控制集成技术、接缝止水新结构和新材料、堆石碾压和检测新工艺3、10 m高陡坝肩窄趾板新结构、安全监测新技术等一系列技术成果。大坝经4年蓄水运行考验,坝体变形小,面板裂缝少,渗漏量不大,应用效果良好。

Research and application of construction techniques for concrete face slab rockfill dam with height about 200-m in narrow valley region

In combination with the Hongjiadu Dam Project,which is located on the narrow and asymmetric valley,a study was performed on the dam construction techniques based on some problems in 2 existing 200 m-high concrete face slab rockfill dams,such as large deformation of the dam body,many cracks in the face slab,and large volume of seepage.Some achievements in techniques were obtained,including the integrated technique for dam body deformation control,the new structures and new materials for joint water seal,the new techniques for rockfill rolling and detection,the new structures of narrow plinth for steep abutment with the height of 310 m,and the new techniques for safety monitoring.Four years' operation of the dam after impoundment shows that,with small deformation of the dam body,few cracks in face slab,and small volume of seepage,the dam is in good operation condition.