Centrifuge modeling of cohesive soil slopes reinforced by stabilizing piles

Abstract

The behaviors of cohesive soil slopes reinforced by stabilizing piles are investigated using centrifuge model tests. The static and dynamic loading conditions are considered in the tests using the geotechnical centrifuge machine with the shaking table. The response of the slope-pile system is measured during testing, including the histories of displacement and acceleration of the slope, and the displacement and strain distribution of the stabilizing piles. The results show that the acceleration response of the slope increases gradually with the increasing altitudes during the earthquake. There is a surface on the inner side of the piles in the slope during the static and dynamic loading, indicating a boundary of different change rules of horizontal displacement. Therefore, the pile-reinforced slope can be divided into four zones with different deformation behaviors. The horizontal displacement of the pile is larger than that of the inner soil and less than that of the outer soil. The piles exhibit a complex interaction with the slope, resulting in a more uniform deformation.