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汉语拼音：wéi yàn

围绕基坑施工区修筑的、用以用施工区的水排除的一种临时性不透水的构筑物（如填有粘土的板桩或金属板）

• When the cofferdams are completed and made safe, the water trapped between them is pumped out.

  围堰完工稳固后，就将围堰间的水抽干。

• Then pumps inject bentonite, a liquid clay and cement mixture into a trench in the middle of the cofferdam.

  接着灌入膨润土，将这种粘土和混凝土液态混合物灌入围堰中间的沟渠。

• Back in the 13th century building dams intercept water, and then wind-driven water tankers drain the water inside the cofferdam.

  早在13世纪就筑堤坝拦海水，再用风动水车抽干围堰内的水。

• The invention relates to a water-retaining cofferdam mode in water and electricity construction.

  本发明涉及一种水电建设中修建的挡水围堰型式。

• This part of the dam serves as a cofferdam which protects the remainders of the foundation for further construction.

  坝的这一部分起着围堰的作用，保护着基础的其余部分，以便进一步施工。

• Until the cement core is built, the cofferdams are made of rubble which is simply dumped into the river.

  在混凝土芯完成前，围堰只是一堆直接倒入江中的土石。

• In this photo, workers clear floating debris near the cofferdam while demolition experts prepare to demolish it.

  在爆破专家准备拆毁围堰之前，工人们清理浮在围堰附近的垃圾碎片。

• Project control: At the storage area to construct the awning, and seal off the water outlets of dam.

  工程控制：在储存区域上建造雨棚，将所有围堰的出水口封堵住。

• The flood dispatching during cofferdam power generation period is mainly divided into two ways of normal and emergent flood dispatching.

  围堰发电期的防洪调度主要有正常调度和非常调度两种方式。