Modelling load–displacement response of driven piles in cohesionless soils under tensile loading

• Published in: Computers and geotechnics Vol. 32; no. 8; pp. 578 - 586
• Main Author: Alawneh, Ahmed Shlash
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.12.2005; Elsevier
• Subjects: Driven pile; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Engineering geology; Exact sciences and technology; Friction fatigue; Load transfer; Load–displacement curve; Residual stresses; Tension pile; Friction fatigue; Residual stresses; Load–displacement curve; Tension pile; Load transfer; Driven pile; material fatigue; stress; sand; tension; driven piles; displacements
• ISSN: 0266-352X; 1873-7633
• DOI: 10.1016/j.compgeo.2005.11.003

A new methodology for deriving the uplift load–displacement response of long driven piles in cohesionless soils is proposed. This method accounts for the effects of the friction fatigue processes during pile driving and the existence of locked-in residual stresses at the end of pile driving before commencing the pile load test. A hyperbolic formulation is utilized to simulate the nonlinear load transfer curves (the so-called t– z curves). The utility of this technique is demonstrated for a field pullout load test on a driven pile in sand. Predicted and measured load–displacement curves showed good agreement, indicating that this approach yields reasonable results as long as representative input parameters are employed.