N a watertight structure, usually of sheet piling, that encloses an area under water, pumped dry to enable construction work to be carried out. Below a certain depth a caisson is required 围堰; 一种防水建筑物，通常由钢板桩筑成防水层，将水下某一区域围住，并将结构内水排干以便可以施工，在水下一定深度时，需要佩戴潜水箱
It was found that the flood, coming from the modern glacier area of the source, was caused by breaking of ice-dam and coffer-dam lakes formed by blocking of river with glacier movement.
初步查明洪水来自源头时现代冰川区，是由于冰川前进阻塞河道，形成冰坝湖、堰塞湖，其溃决酿成大洪水所致。
The swell's data observed in the actual coffer dam demolition blasting have also confirmed the accuracy of model experiment achievement.
实际围堰爆破时的涌浪观测资料也验证了模型试验成果的正确性。
The stress state and seepage of anti-seepage walls under longitudinal RCC coffer dam of Linkuhydropower station are studied using 2d non-linear finite element method.
采用二维非线性有限元分析方法，研究了六库水电站RCC纵向围堰防渗墙的防渗效果和应力应变状态。
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