DFI Journal - The Journal of the Deep Foundations Institute

Volume 4, Issue 1, January 2010

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Drilled Displacement Piles – Current Practice and Design

Prasenjit Basu; Monica Prezzi; Dipanjan Basu


Drilled displacement piles are being increasingly used as foundation elements, particularly in projects requiring fast construction. Different types of drilled displacement (DD) piles are available in practice. DD piles are classified according to the drilling tool design and installation method. The capacity of a DD pile, depending on its type, is between the capacities of geometrically similar nondisplacement and full-displacement piles installed in the same soil profile. This paper provides an overview of the different types of DD piles and their installation techniques and describes three design methods used in practice. It also compares DD pile capacities obtained with these design methods for two different sites.

drilled displacement piles, DD, ACIP, auger piles, augered displacement, partial displacement, full displacement, CFA, Atlas, De Waal, Fundex, Olivier, Omega, Pressure-Grouted Displacement, PGD, SVV, screw pile