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A cofferdam is an enclosure built within a body of water to allow the enclosed area to be pumped out or drained. [1] This pumping creates a dry working environment so ...
A cofferdam during the construction of locks at the Montgomery Point Lock and Dam A cofferdam is a barrier, usually temporary, constructed to exclude water from an area that is normally submerged. Made commonly of wood, concrete , or steel sheet piling , cofferdams are used to allow construction on the foundation of permanent dams, bridges, and ...
Additionally, associated with rubber dam is a caulking adhesive, caulking in definition is a material used to seal joints, in this can be used to fill in gaps between the rubber dam and gingiva as it adheres to the wet rubber dam or mucosal tissues, acting as another mode of protection. [22]
A cofferdam is a small space left open between two bulkheads, to give protection from heat, fire, or collision. [2] Tankers generally have cofferdams forward and aft of the cargo tanks, and sometimes between individual tanks. [3] A pumproom houses all the pumps connected to a tanker's cargo lines. [1] Some larger tankers have two pumprooms. [1]
Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.
In salvage, a cofferdam is a temporary watertight extension of the hull to the surface. Although they are temporary structures, cofferdams are strongly built, heavily stiffened, and reinforced to withstand the hydrostatic and other loads that they will have to withstand. Large cofferdams are normally restricted to harbor operations. [6]: Ch.10
Piling, including piles driven to serve directly as the support member, and sheet piles, which may be used as formwork for cast concrete, or for constructing cofferdams, to allow the enclosed area to be dewatered. Caissons and cofferdams may be used to allow unimmersed work below the surface level of the water. In closed caissons the internal ...
When the cofferdams were in place and the construction site was drained of water, excavation for the dam foundation began. For the dam to rest on solid rock, it was necessary to remove accumulated erosion soils and other loose materials in the riverbed until sound bedrock was reached. Work on the foundation excavations was completed in June 1933.