Static capacity prediction by dynamic methods for three bored piles

Three bored piles were built and tested at the National Geotechnical Experi mentation Sites, at Texas A&M University, to gather data on the reliability of large-strain dynamic methods to predict the static capacity of bored pi les. The three piles had a nominal diameter of 0.915 m, a nominal length of 10 m, and some planned and unplanned defects. The piles were first subject ed to a static load test and then four companies were asked to perform dyna mic tests-namely, Statnamic and drop weight tests-and predict the static lo ad test results. The paper shows the comparison between predicted and measu red results.