江苏省启东市大型船坞砂土模袋围堰设计

由于江苏省启东丰顺大型船坞口围堰工程施工需跨越1~2个长江汛期，为了保证坞口结构安全及施工顺利，必需设置围堰挡水。根据工程地理位置、水下地形及地质条件，结合以往江边工程施工经验，分析了在厚层淤泥质地基上建造砂土模袋围堰的结构设计难点，包括防止袋体析砂现象、背水坡坡体加固和施工降水和变形观测等，并提出了相应的对策。结果表明，工程选择的砂土模袋围堰具有适应能力强，施工速度快，造价低和易拆除等优点。

Design of cofferdam of large scale dock in Qidong City,Jiangsu Province,using sand mold bag

The construction of cofferdam of Qidong large scale dock would go through 2 flood seasons of Yangtze River.In order to ensure the safety of the structure of dock entrance and the smooth construction,the cofferdam should be set for water retaining.According to the geographic location,underwater topography and geological condition,combining with the experience of riverside construction,the key points of structural design of cofferdam of large scale dock on thick muddy foundation using sand mold bag are analyz...