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  2. Tremie - Wikipedia

    en.wikipedia.org/wiki/Tremie

    Assembled tremie placing concrete underwater Hopper, pipes and lifting cap components of a tremie concrete placement tube. A tremie is a watertight pipe, usually of about 250 mm inside diameter (150 to 300 mm), [1] with a conical hopper at its upper end above the water level. It may have a loose plug or a valve at the bottom end.

  3. Tube (structure) - Wikipedia

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

    Tube (structure) John Hancock Center in Chicago, designed in 1965 and finished in 1969, is an example of the trussed tube structural design. In structural engineering, the tube is a system where, to resist lateral loads (wind, seismic, impact), a building is designed to act like a hollow cylinder, cantilevered perpendicular to the ground.

  4. Prestressed concrete - Wikipedia

    en.wikipedia.org/wiki/Prestressed_concrete

    Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. [1][2]: 3–5 [3] This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the ...

  5. 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.

  6. Types of concrete - Wikipedia

    en.wikipedia.org/wiki/Types_of_concrete

    There are two application methods for shotcrete. dry-mix – the dry mixture of cement and aggregates is filled into the machine and conveyed with compressed air through the hoses. The water needed for the hydration is added at the nozzle. wet-mix – the mixes are prepared with all necessary water for hydration.

  7. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    In 1908, the San Francisco Board of Supervisors changed the city's building codes to allow wider use of reinforced concrete. [24] In 1906, the National Association of Cement Users (NACU) published Standard No. 1 [25] and, in 1910, the Standard Building Regulations for the Use of Reinforced Concrete. [26]

  8. Immersed tube - Wikipedia

    en.wikipedia.org/wiki/Immersed_tube

    An immersed tube (or immersed tunnel) is a kind of undersea tunnel composed of segments, constructed elsewhere and floated to the tunnel site to be sunk into place and then linked together. They are commonly used for road and rail crossings of rivers, estuaries and sea channels/harbours. Immersed tubes are often used in conjunction with other ...

  9. Pipe (fluid conveyance) - Wikipedia

    en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

    Pipe (fluid conveyance) Drain pipe of the Louvre. A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids. It can also be used for structural applications; hollow pipe is far ...

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