大埔水电站船闸工程上引航道导航墙施工技术

Construction technique of the upper leading channel's navigation wall of the Dapu hydropower station ship lock

在大埔水电站１００ｔ级船闸上引航道导航墙和靠船墩工程施工中，采用黄土围堰代替草土围堰，在砂卵石河滩上，用粘土置换砂卵石来形成粘土防渗幕，代替高压喷射灌浆防渗处理，在基坑排水中采用“堵、围、引”等措施，仅用１００天就优质地完成了施工任务。

In the construction of the upper leading channel's navigation wall and breasting dolphin of the Dapu hydropower station's 100t ship lock ,the constructers used loess cofferdam to replace turf cofferdam,and replaced sandy gravel with clay to form clay seepage prevention membrane curtain in sandy gravel alluvial flood land. And they also used countermeasures of 'plugging,enclosing, guiding, etc.' for draining excavation's water to replace highpressure jet grouting. They well accomplished the construction task just in 100 days.