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The suction caissons are in many cases easier to install than piles, which must be driven (hammered) into the ground with a pile driver. [4] Mooring lines are usually attached to the side of the suction caisson at the optimal load attachment point, which must be calculated for each caisson. Once installed, the caisson acts much like a short ...
Also called caissons, drilled shafts, drilled piers, cast-in-drilled-hole piles (CIDH piles) or cast-in-situ piles, a borehole is drilled into the ground, then concrete (and often some sort of reinforcing) is placed into the borehole to form the pile. Rotary boring techniques allow larger diameter piles than any other piling method and permit ...
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.
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 ...
A 100-ton open caisson that was lowered more than a mile to the sea floor in attempts to stop the flow of oil in the Deepwater Horizon oil spill has been called a cofferdam. [citation needed] A cofferdam over 1 mile long was built to permit the construction of the Livingstone Channel in the Detroit River. [8] See main article at Stony Island.
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Steel piles are either H-section or tubular, with diameters from 400 to 600 mm. Tubular piles are easier to protect from corrosion. Water depths for container and cargo ships are about 16 m, with a designed pile capacity of about 200 to 400 tons, so in most cases the pile length will be between 30 and 40 m.