高压旋喷灌浆在锦屏二级电站进水口围堰防渗中的运用

锦屏二级水电站进水口纵向围堰防渗设计采用塑性砼防渗墙，施工中发现，防渗墙实际施工深度远远超过设计深度，这将意味着增加施工成本，延长施工工期．为解决这一问题，在施工中将部分深槽段修改为悬挂式塑性砼防渗墙，针对其未达到截渗的目的，在塑性砼防渗墙中预埋钢管，对其下部进行高压旋喷灌浆，形成高喷防渗墙，经检测防渗效果满足要求，达到了节约投资，缩短工期的目的．

Application of high pressure circumvolved grouting to intake cofferdam seepage prevention in Jinping hydropower station

Plastic concrete cut-off walls were adopted in intake longitudinal cofferdam seepage prevention of Jinping second stage hydropower station.It is found that the actual construction depth of cut-off walls is far superior to the projected depth,which means increasing construction cost and delaying construction period.In order to solve the problem,some deep channel sections are revised into suspended plastic concrete cut-off walls during construction.Because the goal of cutting infiltration had not been attaine...