江坪河面板堆石坝面板加强防渗技术综述

Summary on the Strengthening Anti-seepage Technologies for the Face Slab of Jiangpinghe Concrete Face Rockfill Dam

江坪河面板堆石坝坝高219 m,属200 m级以上高面板坝,由于其特殊的建设历程,且工程蓄水后,堆石体还有较长一段时间的变形过程,面板承压水头大,面板及止水系统会遭到一定程度的破坏,从而影响面板的防渗效果。为此,在一定水头下的面板区域分别采用了PVC加强防渗、水泥基结晶涂料防渗及周边缝自愈料钢罩防渗措施。初期蓄水以来,通过监测数据初步反映这些加强防渗措施是可行且有效的。

The Jiangpinghe concrete face rockfill dam is 219 m high. Due to its special construction process, the rockfill body still has a long-term deformation process after the project is impounded and the face slab is under large water pressure, the face slab and the water stop system will be damaged to a certain extent, thereby the anti-seepage effect of the slab is affected. For these reasons, some strengthening anti-seepage measures are used in different area with different water head including PVC reinforced anti-seepage, cement-based crystalline paint anti-seepage and peripheral seam self-healing steel cover anti-seepage.Since the initial impoundment, the actual monitoring data shows that these strengthening anti-seepage measures are feasible and effective.