滩坑水电站混凝土面板堆石坝筑坝施工综述

滩坑面板坝采用了一些新的筑坝施工理念,采用抛石挤淤工法,实现基坑深覆盖层坝基开挖快速施工;汛期适当提高坝体填筑高程,在坝面高差处设置超径石保护,经多次过流坝面冲刷少;坝体填筑超高值,下游坝体反抬加高填筑,较好地控制了坝体变形。大坝安全监测结果表明,坝基沉降量小;施工期及蓄水后坝体沉降均匀,水平位移小,大坝施工质量良好。

Summarization on the Dam Construction of Concrete Face Rockfill Dam for Tankeng Hydropower Station

The construction of dam body for Tankeng Hydropower station was constructed with some new construction concepts.The technique of throwing stones to crush silt was adopted to realize the quick construction of deep foundation pit.The crest elevation of dam body was enhanced properly during flood season period and the protection measures using extra-diameter stones were taken in the dam surface.The surface of dam was less eroded after flowing over it many times.The extra-high quantity of the dam body filling and the downstream dam body was heightened to control the de- formation of dam body effectually.According to the dam safety monitoring results,the settlement quantity of dam foun- dation was small.The settlement is even and horizontal movement is small during the construction and impoundment pe- riod so that the construction quality of the dam is good.