Experimental Analysis of the Dynamic Stress Distribution at the Soil Foundation Interface

This paper presents the dynamic stresses within the soil-foundation interface zone measured by an experimental process. The cubic foundation prototype is subjected to a cyclic loading directly generated by the testing machine at the foundation center. The stress enhancement induced by the dynamic loading may lead to a partial confinement with an eventuality of instability risks or resistance loss; showed by a particle rearrangement. The tests have been conducted on two soil samples namely dense and medium dense sand. Experimental displacements, measured at the soil foundation interface are represented, as a function of the number of cycles, for a constant stress level. The dynamic behaviors of used sample soils are analyzed and some concluded remarks are presented.