With modern developments in science and technology, many Civil, industrial, and defence oriented structures have come up which are subjected to time dependant external forces. After second world war, development in nuclear appliances have led to the necessity of a more precise study of foundations under transient loads. As a consequence, the design engineers are confronted with the problem of large dy namic loads acting for a very small duration of time .. While design of superstructure against such loads has received considerable attention from many investigators with some degree of refinement, the design of substructure lagged behind because of erratic, heterogeneous and intricate characteristics of the supporting soil medium.