What is a drilled caisson?

What is a drilled caisson?

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.

When would you use a drilled shaft?

Drilled shafts, also referred to as drilled piers, caissons or bored piles, are deep foundation solutions used to support structures with large axial and lateral loads by excavating cylindrical shafts into the ground and filling them with concrete.

Why are drilled shafts to be used for the new Sacramento Lift Bridge?

Drilled shafts will be used for the foundations because of their seismic resistance and ability to carry large vertical loads with low settlement, according to Johns.

What is a CIDH pile?

Cast-In-Drilled-Hole (CIDH) piles are commonly used in the construction of bridge structures, and refer to a construction method in which the reinforced concrete piles are cast in drilled holes to predetermined elevations using a heavy wall steel casing to prevent caving.

What is an auger cast pile?

Auger cast piles are a type of drilled foundation in which the pile is drilled to the final depth in one continuous process using a continuous flight auger.

What is CDIH?

Acronym. Definition. CDIH. Centro Documentazione Integrazione Handicap (Italian)

What is bored pile?

Bored piles are cylindrical bodies made of concrete (with or without reinforcement) which are installed in the ground by a variety of methods. They transmit high structural loads into lower, load-bearing soils. The length, diameter, material, shape and layout of the piles can be varied according to their intended use.

What is the difference between piles and caissons?

Caissons are watertight structures made up of wood, steel or reinforced concrete built above the ground level and then sunken into the ground. Caisson is putting a box into underwater and pouring it with concrete. Pile is a column of material driven by a piledriver.

Why Bentonite is used in piling?

Bentonite slurries are known to perform the following pivotal functions: a) Support the excavation by exerting hydrostatic pressure on its walls i.e. to prevent the collapse or retain an area. b) Remain in the excavation, and not flow to any great extent into the soil thereby acting as a sealant.

What is continuous flight auger piles?

Continuous Flight Augering (CFA Piling), also known as auger cast piling, is a technique used to create a concrete piled foundation solution. While the concrete is being pumped, the auger is withdrawn at a controlled rate, removing the soil and forming a shaft of fluid concrete extending to ground level.

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