Glossary

French: tapis imperméable

German: Dichtungsschicht

Spanish: manto impermeable

Italian: copertura impenetrabile

Portuguese: tapete impermeavel

Dutch: ondoorlatende laag

Also known as the Transient Dynamic Response Method, or the Sonic Mobility Method. An integrity test in which a low-strain stress wave is generated at the shaft head by an impact from a small hammer that contains a transducer to measure force input. The r

Corrugated (usually 12 to 18 gauge) steel rolled into a spiral pipe with the joint crimped or welded watertight. The shell is installed as a pile with a mandrel.

Title of computer program developed by Hubbell Power Systems, Inc./A.B. Chance which calculates the bearing and uplift capacity of helical anchorages/foundations in soil.

Generally round steel plate formed into a ramped spiral. The helical shape provides the means to install a helical anchorage, or a helical foundation, plus the plate transfers load to soil in end-bearing. Helix plates are available in various grades, di

(See Screw Pile)

Steel accessory placed over a pile to prevent damage from driving. Also called Anvil Block, Bonnet, Cap, Driving Head, Helmet, Follow Cap, Rider Cap, Shield. See sketches, Appendix A.

French: faux pieu/casque de battage

French: hétérogène

German: verschiedenartig, heterogen

Spanish: heterogeneo

Italian: eterogeneo

Portuguese: heterogeneo

Dutch: heterogeen

See Dynamic Load Test and Dynamic Pile Monitoring.

A dynamic pile driving formula for estimating the static load bearing capacity of a pile driven from its penetration resistance. It includes terms for pile weight to ram-weight ratio, pile rebound, and cushion properties.