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  2. Multilevel groundwater monitoring systems - Wikipedia

    en.wikipedia.org/wiki/Multilevel_groundwater...

    Multi-screen casing completion: the MLS is installed inside of a multi-screened steel or PVC well. Each well screen segment has a sand or gravel pack between it and the borehole wall, and is thus isolated from monitoring zones above and below by a grout or bentonite seal. The MLS is then constructed inside of the multi-screened well.

  3. Shaft sinking - Wikipedia

    en.wikipedia.org/wiki/Shaft_sinking

    From the bottom of the box cut, the shaft collar is constructed bottom up in a planned series of concrete pours. Galloway (Sinking Stage) Construction & Installation. The Galloway (also known as a Sinking Stage or Scaffold) is a multi-level working platform, suspended in the shaft from winches located on the surface. The Galloway allows sinkers ...

  4. Beam and block - Wikipedia

    en.wikipedia.org/wiki/Beam_and_block

    Beam and block is a construction method to support flooring, especially for ground floors as well as multi story buildings. [1] It is made of cast concrete, one piece of which is a prestressed concrete beam, which can be an inverted T-shaped beam, or lintel, the other piece being a simple rectangular block. [1]

  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. Lift slab construction - Wikipedia

    en.wikipedia.org/wiki/Lift_slab_construction

    Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...

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