ISP5 Pile Prediction Revisited

Even with the establishment of Eurocode 7 in the European Union and its accompanying national application documents and standards for geotechnical investigation and testing there are still outstanding problems with the various national practices of pile design. This paper presents a revised interpretation of the prediction exercise for pile bearing capacity and settlement originally presented at ISP5 in August 2005. The field tests with the Ménard pressuremeter, the static cone penetrometer, and the SPT performed at the site, the answers to the exercise and a detailed investigation of the practice are discussed. The results are compared to the predictions of other national codes and of customarily used design methods and to the results from an instrumented CFA drilled shaft tested on the site