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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] It is 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 ...
Also called caissons, drilled shafts, drilled piers, cast-in-drilled-hole piles (CIDH piles) or cast-in-situ piles, a borehole is drilled into the ground, then concrete (and often some sort of reinforcing) is placed into the borehole to form the pile. Rotary boring techniques allow larger diameter piles than any other piling method and permit ...
Screw foundations first appeared in the 1800s as pile foundations for lighthouses, [4] and were extensively used for piers in harbours. Between the 1850s through 1890s, more than 100 screw-pile lighthouses were erected on the east coast of the United States using screw piles.
The caisson provides buoyancy during construction and towing and acts also as a foundation structure in the operation phase. Furthermore, the caisson could be used as storage volume for oil or other liquids. [1] Floating units may be held in position by anchored wires or chains in a spread mooring pattern.
The use of segmental lining installed by underpinning or caisson sunk to form a circular shaft; Incremental excavation with a shotcrete circular or elliptical lining; Incremental excavation supported by shotcrete, rock bolts, cable anchors and steel sets or ribs; Shafts can be sunk either dry or for methods such as the caisson method they can ...
A DeLong pier is a type of elonged ersatz pier constructed from prefabricated barge-like sections and simple caissons driven into a harbor's seafloor. First used during the Vietnam War at Cam Ranh Bay , the DeLong pier was originally designed shortly after the Second World War by the DeLong Corporation, and a prototype was constructed not long ...
Example of a compound pier in the maha mandapa of the Vitthala Temple in Hampi, south India.. Compound pier or cluster pier is the architectural term given to a clustered column or pier which consists of a centre mass or newel, to which engaged or semi-detached shafts have been attached, in order to perform (or to suggest the performance of) certain definite structural objects, such as to ...
A water resources borehole into the chalk aquifer under the North Downs, England at Albury. Engineers and environmental consultants use the term borehole to collectively describe all of the various types of holes drilled as part of a geotechnical investigation or environmental site assessment (a so-called Phase II ESA).