Case Study: Static-Dynamic Correlations on Steel Tube Piles in Soft Rock
SourceThis paper describes correlations obtained during a series of tests on steel tube piles at one project. Several steel tube piles were driven in a marine environment and tested dynamically using the Pile Driving Analyzer/CAPWAP® system and also static tested in tension with strain gages at intervals along the pile penetration to assess resistance distribution along the shaft. The static and dynamic testing were both conducted soon after driving as well as after a period of approximately 4 weeks. The dynamic predictions provided good correlation to the static pile top displacement versus overall resistance. The dynamic results showed a resistance distribution that also seemed reasonable with regard to ground conditions, but the static testing consistently showed more resistance concentrated near the toe of the piles. In particular, very high resistance was consistently shown in the bottom 2 m of the piles comprising 40 %–60 % of total resistance.