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二期围堰利用施工前的准备期选取围堰左右岸接头段进行防渗体成墙或成槽系列性试验工作，取得了大量工艺效果，为二期围堰科学决策和顺利施工奠定了基础。
Phase II cofferdam uses the pre-construction preparation period to select the left and right cofferdam connecting section for anti-seepage into a wall or into a series of slot test work, and achieved a lot of process results for the second phase of cofferdam scientific decision-making and smooth construction laid the foundation .