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2. Tetrapod (structure) - Wikipedia

   en.wikipedia.org/wiki/Tetrapod_(structure)

   A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters. Tetrapods are made of concrete , and use a tetrahedral shape to dissipate the force of incoming waves by allowing water to flow around rather than ...

3. Wave-dissipating concrete block - Wikipedia

   en.wikipedia.org/.../Wave-dissipating_concrete_block

   Tetrapods used to protect a seawall Large interlocked Xblocs (8.0 m 3 or 280 cu ft) in a trial placement. A wave-dissipating concrete block is a naturally or manually interlocking concrete structure designed and employed to minimize the effects of wave action upon shores and shoreline structures, such as quays and jetties.

4. Block-setting crane - Wikipedia

   en.wikipedia.org/wiki/Block-setting_crane

   Placing concrete blocks in the breakwater at IJmuiden Alexander Shanks's 30 ton Hercules crane for Liepāja Early examples were built by Stothert & Pitt for the Breakwater Crane Railway , Douglas Harbour, Isle of Man [ 7 ] and by Alexander Shanks & Son for Liepāja in Latvia , then part of Russia , [ 8 ] and a 50 ton crane for Roker Pier ...

5. Xbloc - Wikipedia

   en.wikipedia.org/wiki/Xbloc

   Large Xblocs (8.0 m 3 or 280 cu ft) on a trial placement area. An Xbloc is a wave-dissipating concrete block (or "armour unit") designed to protect shores, harbour walls, seawalls, breakwaters and other coastal structures from the direct impact of incoming waves.

6. Dolos - Wikipedia

   en.wikipedia.org/wiki/Dolos

   A dolos (plural: dolosse [1]: 10 ) is a wave-dissipating concrete block used in great numbers as a form of coastal management. It is a type of tetrapod . Weighing up to 8 tonnes (8.8 short tons ), dolosse are used to build revetments for protection against the erosive force of waves from a body of water.

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8. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   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.

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