Cofferdam is a temporary watertight enclosure constructed in a body of water to create a dry working environment for construction or repair projects below the waterline. It is typically formed by driving sheet piles, steel frames, or concrete walls into the riverbed or seabed, which are then sealed to prevent water from entering the enclosed area. The water inside the cofferdam is pumped out, exposing the normally submerged area and allowing work to proceed in dry conditions. Cofferdams play a crucial role in the construction and maintenance of bridges, dams, ports, and other structures that require underwater work. They provide a safe and controlled environment for workers, enabling them to lay foundations, perform excavations, or carry out repairs without the interference of water. The design and construction of a cofferdam depend on various factors, such as water depth, current, soil conditions, and the nature of the project. Different types of cofferdams, including braced, cellular, and double-walled, are used depending on the specific requirements. Once the work within the cofferdam is completed, the structure is dismantled, and the area is restored to its original condition.
dewatering, excavation, foundation, hydraulic engineering, sheet piling, temporary structure, watertight
CITATION : "John Armstrong. 'Cofferdam.' Design+Encyclopedia. https://design-encyclopedia.com/?E=434103 (Accessed on December 30, 2024)"
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