Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)
Navy pier dock expansion static and dynamic test program
P.J. Hannigan, S.D. Webster, R.K. Lukas & C.M. McComb
The Navy Pier dock expansion project is supported by 1650 closed end pipe piles driven into a very dense glacial till. Previous dock expansion phases indicated the potential for hard driving conditions. Therefore, the wave equation was used in the design stage to specify pile hammers capable of installing piles to the design requirements. An indicator pile program with static and dynamic testing was performed to confirm design assumptions. The indicator program included load transfer evaluation of the static load test results from embedded vibrating wire strain gage data. This paper will illustrate the application of the design stage wave equation analyses to specify a driving system capable of meeting design requirements. The paper will also present the results of static and dynamic load testing results. A comparison of load transfer versus depth predicted by both methods including residual stress considerations will be presented. Lastly, the paper will discuss observed variations in drive system performance as well as pile capacity for production iles driven to the same driving criterion.
|article #840; publication #36 (IC-1994)|