EFFECT OF TYPE OF REPLACEMENT FILL BENEATH STRIP FOOTING ON ITS BEHAVIOR

The design of shallow foundations resting on replacement fill depends on the replacement deformation behavior. The fill is usually a compacted granular sandy or gravelly soil or a mix of them. The stiffness of the fill controls the deformation behavior of the footing, including strip footing. Two types of loading give equal final total load. The loads may comprise a series of point loads or a uniform line load. The type loading have a major role on the strip footing deformation behavior. The thicknesses of the footing have also a role on its performance. In recent years, finite element programs have been used to obtain the actual performance of the footing using the suitable soil model. In this study, an experimental work is performed to represent a loaded strip footing with a series of point loads and the settlement of the footing is recorded for different types of fill. Thereafter, an analytical model is performed and solved by non linear solution using PLAXIS 3D program. The models were performed to examine the effect of changing the type of loading. Results are compared with the experimental findings.