Effect of Pile's Number on the Behavior of Piled Raft Foundation

This paper introduces an experimental research on the behavior of piled raft foundation (PRF) in sand two states (loose and medium sand). A small model has been tested a soil container vertical load was applied to through pneumatic jack. The settlement measured using displacement transducer; three sensors were attached pile heads measure axial borne group by each Arduino data logger. laboratory experiments carried out models (1 pile), (1x2), (1x3), (2x3), (3 x3), piles triangular), (4 diamond), (5 piles), (9 circle), as well tests unpiled raft. Test variables length, number piles, density. It is noticed that when increased nine group, bearing capacity 40%. effect starts increase one just placed under 3% 7% length 15D and, 20D, respectively. reduction also observed be smaller no economic advantage achieved with more piles. If reaches (6) influence disappears.