旁多坝址冰水堆积层可灌性分析

Analysis of groutability in ice water accumulation horizon for Pangduo dam

旁多水利枢纽工程是西藏自治区"十一五"期间重点水利工程项目,为拉萨河中段梯级开发之首。大坝基础采用全封闭防渗方案,即上墙下幕,防渗墙深入至冰水堆积层一定深度,墙下帷幕进入基岩,因此对坝基冰水堆积层可灌性分析评价是很必要的。通过对旁多坝址冰水堆积层可灌性的分析评价,结果表明坝基冰水堆积层属可灌地层。

Pangduo hydro project is a key hydraulic engineering project during 'eleven-fives' period in Tibet Autonomous Region,is the head of cascade development in the middle part of Lhasa river.The foundation of dam uses totally enclosed anti-seepage measure that is cutoff wall embeds the ice water accumulation horizon to certain depth and curtain grouting under cutoff wall is to the bedrock.It is necessary to evaluate the groutability of ice water accumulation horizon.The result shows ice water accumulation horizon of the dam base can be grouted through the evaluation of groutability of ice water accumulation horizon of Pangduo hydro-junction.