EVALUATION OF DYNAMIC COMPACTION EFFECTS ON LIQUEFACTION REMEDIATION USING PIV METHOD

Accurate measurement of soil deformation is fundamental to the success of geotechnical modeling. One of the methods that has received a great attention in recent years because of numerous benefits is the use of digital images. This technique is on the basis of division of taken images from soil mass under deformation in to several patches and measurement of displacements between frequent images with aide of image processing. The study of dynamic compaction and diverse influenced factors with the physical modeling of loose sand has been undertaken using Particle Image Velocimetry (PIV) method. Tamping was executed by raising and dropping semi-cylindrical steel tampers on the surface of loose sand deposit by repeating the process for different combinations of tampers, applied energy intensity and number of drops. The effect of dynamic compaction on liquefaction remediation has been evaluated. The most important factor in this regards was the pattern of soil densification and density change in depth. Some relations between applied energy, contact stress, influenced depth and liquefaction potential has been discussed.