All engineered construction resting on the earth must be carried by some kind of interfacing element called a foundation. The foundation is the part of an engineered system that transmits to, and into, the underlying soil or rock the loads supported by the foundation and its self-weight. The resulting soil stresses except at the ground surface are in addition to those presently existing in the earth mass from its self-weight.
Prof. Ravi Kumar (2017); Model studies of single bent pile with respect to different density i.e. loose, medium and dense of cohesion less soil;
Int J Sci Res Publ 7(2) (ISSN: 2250-3153). http://www.ijsrp.org/research-paper-0217.php?rp=P626215