二滩工程截流是大江大河深厚覆层上高落差截流,一标承包商EJV在投标阶段曾推荐采用三戗立堵方式。1991年9月发布开工令后,EJV通过单戗平堵与三戗立堵方案比较和模型试验验证,于1992年5月正式向工程师推荐平堵截流方案。经工程师审查批准,同意EJV采用平立堵综合截流方案。该方案具体作法如下:先从围堰桥上平抛块石护底;然后从2号戗堤立堵预进占保护桥墩,形成宽约80m的龙口;待导流洞开始分 Ertan project closure is a large river deep overcrossing high cutoff, a standard contractor EJV had recommended the use of three 戗 legislation blocking mode during the tender. In 1991 September after the launch of the start-up order, EJV through a single flat plug blocking and Sanji Li plug scheme comparison and model test verification, in May 1992 formally recommended to the engineer to cut off the closure of the program. After examination and approval by the engineer, EJV agreed to use Pingli block integrated closure plan. The program specific practices are as follows: first cofferdam from the cofferdam bridge stone paving; and then embankment from No. 2 embankment pre-occupation protection pier, the formation of a wide mouth about 80m;