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In underwater construction, one of the most effective methods to keep water out of the work area is by using a cofferdam. This temporary structure is typically made of tightly interlocked steel sheet piles arranged in cylindrical cells, forming a watertight wall. Cofferdams are commonly used to create a dry and secure environment for building bridge foundations and other underwater structures. They are specifically designed to withstand water pressure and provide stability during concrete pouring or the installation of structural elements below the waterline.


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