草土围堰在南河水电站运用

Application of straw earth cofferdam to a project

南河水电站坝下混凝土施工采用草土围堰挡水，充分发挥了草土围堰“就地取材、土法上马、成本低廉；构造上适应基础变形能力强、防渗性能好”等优点，使全长１６８ｍ长的草土围堰只２０天就顺利完成了，为护坦混凝土浇筑比原设计提前１年完成创造了条件，给工程取得了良好的经济效益。

A straw earth cofferdam was built during construction of the concrete structure downstream from the dam at Nanhe Power Station, which brought into full play the straw earth cofferdams advantages: using local materials, getting on job with local method, low cost, strong capability adaptable to deformation of the foundation, good behavior in seepage prevention, etc., made the 168 m long straw earth cofferdam be completed within only 20 days, created favourable conditions for placement of concrete in apron to be completed one year ahead of planned schedule, and achieved good economic benefit of the project.