Proceedings of the 27th Annual Conference on Deep Foundations, 2002, San Diego, CA "The Time Factor in Design and Construction of Deep Foundations", (DFI)
High-Stress Pile Testing at Soldier Field
Michael H. Wysockey, Thomas J. Wysockey, Manohar Chawla
The load test program for the pile foundation at Soldier Field included static and dynamic load tests at four locations around the site. The dynamic tests were run with no knowledge of the static results, and comparison between the two is very good. It was necessary to use a special testing hammer (not the production hammer) to demonstrate capacity with dynamic testing. Over 90% of the piles were HP 14x89 with a design load of 230 tons (18 ksi). The load tests showed a capacity in excess of 590 tons for all tests where sufficient set up time was allowed. The remainder of the piles were mostly HP 12x53 with a design load of 100 tons (13 ksi). The measured capacity of these piles was typically about 250 tons. One experimental HP 12x74 pile with a nominal yield of 65 ksi held 730 tons (67 ksi) before failing.
|article #1232; publication #61 (AM-2002)|