cofferdam

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The dam builders fail to consider the downstream effects of cofferdam failure.
水垻工程師沒有考慮圍堰崩潰對(duì)下遊造成的影響。
In this photo, workers clear floating debris near the cofferdam while demolition experts prepare to demolish it.
在爆破專家準(zhǔn)備拆燬圍堰之前，工人們清理浮在圍堰附近的垃圾碎片。
The cofferdam was demolished on June 6, 2006, in just 12 seconds, but required enough explosive force to topple 400 10-story buildings.
圍堰在2006年6月6日，僅用了12秒鍾即被拆燬，但要拆燬這個(gè)長(zhǎng)達(dá)400米，高達(dá)10層樓的建築物需要有足夠的爆破力。

The demonstrators accuse Norte Energia of damming the final canal of the river without having solved the matter of how to move boat traffic from one side of the cofferdam to the other, as required by the Installation License issued by Ibama.
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a large box filled with air that allows people to work underwater, for example while building bridges

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