Pile Settlement Based on Dynamic Measurements

by Samuel G. Paikowsky, (M.ASCE), Univ of Massachusetts-Lowell, Lowell, United States,
Valerie A. LaBelle, (S.M.ASCE), Univ of Massachusetts-Lowell, Lowell, United States,
John E. Regan, (A.M.ASCE), Univ of Massachusetts-Lowell, Lowell, United States,
Les R. Chernauskas, (A.M.ASCE), Univ of Massachusetts-Lowell, Lowell, United States,



Document Type: Proceeding Paper

Part of: Vertical and Horizontal Deformations of Foundations and Embankments

Abstract:

Dynamic measurements during driving are well established for monitoring driving performance and the prediction of pile capacity. Post driving, signal matching office methods (e.g. CAPWAP) are used to estimate the distribution and magnitude of the resisting forces acting along the pile shaft and tip during driving. The static components of these resisting forces are assumed to constitute the actual static pile capacity. Using the force displacement relationship for these forces along the pile shaft and tip, a load test simulation can be carried out. A large data set was assembled, containing information on piles that were monitored during driving and then load tested to failure. A comparison is presented between the predicted and observed load-settlement relationships. The assembled data suggests that the dynamic analyses provide sensible soil parameters to conduct load test simulations. These simulations resulted in reasonable predictions in the expected work load zone.

Subject Headings: Load tests | Pile settlement | Pile tests | Soil settlement | Failure loads | Dynamic loads | Load bearing capacity

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