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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.
Underwater construction is industrial construction in an underwater environment.It is a part of the marine construction industry. [1] It can involve the use of a variety of building materials, mainly concrete and steel.
Tunnel work is a major application of hydrophobic concrete as underground repairs are difficult and costly. [8] It is also a favorite choice for laying foundations for buildings and sidewalks in locations below the water table. [citation needed] Underwater use of hydrophobic concrete is a major application in marine facilities.
A submarine pipeline (also known as marine, subsea or offshore pipeline) is a pipeline that is laid on the seabed or below it inside a trench. [ 1 ] [ 2 ] In some cases, the pipeline is mostly on-land but in places it crosses water expanses, such as small seas, straits and rivers. [ 3 ]
Boat building is the design and construction of boats (instead of the larger ships) — and their on-board systems. This includes at minimum the construction of a hull , with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.
A carvel boat has a smoother surface which gives the impression that it is more hydrodynamically efficient since the exposed edges of the clinker planking appear to disturb the streamline and cause drag. A clinker certainly has a slightly larger wetted area, but a carvel hull is not necessarily more efficient: for given hull strength, the ...
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The MOSE system is flexible: depending on the winds, atmospheric pressure and level of tide, it can oppose the high water in different ways – with simultaneous closure of all three inlets in the case of exceptional tides, by closing just one inlet at a time, or by partially closing each inlet—given that the gates are independent—for ...