This paper presents a cloud based application, known as IMPACT, for analyzing the driving performance of pile foundations using a 1-dimensional wave equation model. The interaction between pile and soil is captured by non-linear springs and dashpots distributed along the pile shaft and base. The pile-soil springs are based on theoretical continuum models and, because the internal soil column is treated explicitly with separate interaction springs compared with the external soil, it is particularly suitable for large diameter open ended 'monopiles' used to support offshore wind turbines. The application also includes the unique ability to be run in a 'data driven mode', whereby the soil resistance to driving (SRD) is computed directly from input cone penetration test (CPT) data. Users have the ability to select from a range of widely used SRD models for particular soil types or specify custom options. In this paper, the application is demonstrated in data driven mode using two case histories. The influence of plug response on driving behavior are discussed in the light of the case histories.
James P. Doherty, Mark F. Randolph and James A. Schneider
Keywords: pile driving anaysis, soil resistance to driving, cone penetration test
Publisher: DFI