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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.
A suction caisson can effectively be described as an inverted bucket that is embedded in the marine sediment.Attachment to the sea bed is achieved either through pushing or by creating a negative pressure inside the caisson skirt by pumping water out of the caisson; both of these techniques have the effect of securing the caisson into the sea bed.
Rolling caissons are a development of sliding caissons fitted with rollers beneath. These do not rely solely on buoyancy to make them portable and so are easier to operate. [7] The caisson may only need to be lifted a few inches to make it movable on its track, which significantly reduces the ballast pumping time compared to a ship caisson.
Each caisson was supported by a single hydraulic ram consisting of a hollow 50 ft (15.2 m) long cast iron vertical piston with a diameter of 3 ft (0.9 m), in a buried 50 ft (15.2 m) long cast iron vertical cylinder with a diameter of 5 feet 6 inches (1.68 m). At river level the caissons sat in a water-filled sandstone lined chamber.
Image credits: Bemy_Gunshot Romy Latter was on holiday when Bored Panda reached out to her. But the animator, illustrator and game developer happily agreed to take some time out from her R&R to ...
An honor guard loaded the caisson, a ceremonial wagon designed a century ago to ferry artillery to the battlefront and the wounded and dead to the rear, with an empty coffin. The practice ...
A breakwater structure is designed to absorb the energy of the waves that hit it, either by using mass (e.g. with caissons), or by using a revetment slope (e.g. with rock or concrete armour units). In coastal engineering, a revetment is a land-backed structure whilst a breakwater is a sea-backed structure (i.e. water on both sides).
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