Drilled shafts, also referred to as drilled piers, caissons, cast-in-drilled-hole piles or cast-in-situ piles, are high-capacity deep foundation solutions. A drilled shaft is constructed by drilling a cylindrical borehole to design diameter and depth, lowering rebar cage into the drilled shaft, and then filling the shaft with concrete.
For making a splice between two fixed bars. The rebar are inserted to meet at a center stop in the coupling sleeve and the screws are tightened. The tightening process embeds the pointed screws into the bars.
Augercast Piles (ACP), also known as Continuous Flight Auger (CFA) piles, are concrete bearing piles constructed by augering a hollow stemmed auger into the ground to a predetermined depth. Concrete is then forced down the hollow stem utilizing pump pressure. As the concrete is ejected from the tip of the auger, the auger is withdrawn such that spoil (augered dirt) is removed ahead of the concrete.
Soil nailing is an economical, stabilization method used to reinforce and strengthen existing slopes, by installing tension-resisting steel nails in the soil, creating a gravity retaining wall for permanent or temporary excavation support. Soil nail walls are typically constructed from the top down. Soil is excavated in varying depths, then tension-resisting steel bars are inserted into the holes and grouted in place, creating a composite mass similar to a gravity wall. A constructed face, typically made of a shotcrete cover, is normally required over the shoring bars, which reinforces the woven mesh or rebar matt over the steel plates. Permanent walls are usually built with a cast-in-place face over nailing.
Duct banks are groups of conduits designed to protect and consolidate cabling to and from buildings. In a duct bank, data and electrical cables are laid out within PVC conduits that are bundled together; these groupings of conduit are protected by concrete and rebar cages. Duct banks are often buried, allowing contractors to consolidate the wiring for a building into centralized underground paths.
Common materials for column forms include plywood, paper board, plastic, and steel. Most systems produce simple round or rectangular columns. However, almost any column design is possible by building custom wood forms, modifying existing forms, or using precision-cut polystyrene forms or form inserts.