Glossary

Cased or un-cased, small diameter, soil displacement, cast-in-place screw pile in which gravity-fed grout forms a shaft around the central steel element above the helix plate(s).

A high-strength steel shaft with one or more helix-shaped circular steel plates welded to a central steel hub “lead section”. Helix anchors are installed by screwing the helix plates into the soil through the application of a rotating force on the centra

Grout is pressure-injected into deposits of rock containing fissures, cavities, seams, etc; to solidify and strengthen the formation; to reduce or eliminate a flow of water through the formation; to reduce the hydrostatic uplift under a structure such as

See Fender Pile

French: butoirs/heurtoirs

That part of the pile hammer leads forming a pathway for the hammer, and consisting of parallel members, which mate with side channels of a pile hammer. Also called Lead Rails, Hammer Guides.

Shallow concrete walls placed on either side of the alignment of a slurry wall to provide vertical and horizontal alignment control for the excavation and subsequent support of the reinforcing steel cage and/or other elements to be placed in the trench.

French: murettes-guides

German: Leitwände

Italian: muro guida

Portuguese: muretes-guia

Dutch: geleide wanden

A dark-colored, very sticky, highly plastic clay, occurring abundantly in the central and southern parts of the U.S.A.

A line that steadies a high piece or structure by pulling against an off-center load

French: hauban

A standard steel-erecting derrick, with guyed mast and a hinged boom at its base, both able to swivel on the base.

French: derrick maintenu par des tirants

A gravity hammer in the shape of an inverted “U” used without leads to start sheet piles into the ground. Sometimes called pants.