Regression and trend analysis of LEAP 2020 experimental results

The LEAP-2020 comprised a series of 23 centrifuge experiments of a saturated Ottawa sand (backfill) deposit supported by a cantilever wall. The experiments covered a comprehensive range of experimental conditions. The deposits had a relative density that varied from 49% to 76% and the centrifuge models were subjected to input motions that varied in amplitude and frequency content. The experimental results were consequently marked by a broad spectrum of response characteristics. A Gaussian Process Regression (GPR) was employed to investigate and assess the trends and response mechanisms of permanent lateral displacements, settlements, wall rotation and pore pressure buildups of the tested soil-retaining wall systems. The analyses showed a high level of consistency among the experimental results and shed light on a number of salient response characteristics.