Centrifuge Modeling of Shallow Foundation on Soft Soil

Abstract

A series of centrifuge model tests was performed to study the behavior of shallow foundations on soft normally consulidated clay. The model tests included testing of foundation models with one-dimensional, plane strain, and axially symmetric geometries. The nonlinear consolidation properties of the soil were determined using specially developed laboratory testing techniques. The centrifuge test data were then compared with conventional and fir1jte strain theories for consol idation assessment, as well as a 1imit analysis solution for foundation stability considerations..Ĩ t is found that centrifuge testing coupled with careful laboratory testing providesca useful tool to validate analytical procedures. It has demonstrated that the finite strain theory and the limit analysis solution are valid procedures for the determination of consolidation settlement and foundation penetration of·shallow foundations on soft soil, respectively.

Centrifuge Modelling With Transparent Soil and Laser Aided Imaging

“…The zone of influence increases from z/B ¼ 1.0 to 2.0, while the horizontal displacements remain relatively unchanged. This is a clear indication that the foundation has failed and is penetrating excessively into the soil and the extent of deformation and the plastic zone is consistent with that observed in similar shallow footing tests reported O'loughlin and Lehane (2009) and Leung et al (1984). Nevertheless, it is also clear that the boundary conditions provided in the test were suitable as the displacement contours remained contained in the soil and well away from the chamber boundaries.…”

Gravity Sedimentation: A One-Dimensional Numerical Model

“…Also, Townsend and Hernandez (1985) concluded that the physical models could represent the sedimentation/consolidation phases, provided the appropriate time scaling component was used. According to Schiffman et al (1985) centrifuge validation of nonlinear finite strain consolidation for soft an~ very soft materials was presented by Bloomquist and Townsend (1984), •Croce, et al (1984), Leung, et al (1984), Mikasa and Takada (1984), and Scully et al (1984).…”