An Experimental Studyon Behaviourof Piled Raft Foundation

Jaymin D.Patil; Sandeep A. Vasanwala; Chandresh H. Solanki

doi:10.37591/joge.v1i3.4037

Abstract

Piles in piled raft are often considered as settlement reducers, not load bearing members. Theexperimental study focuses on the behaviour of piled raft foundation subjected to vertical load. The model rafts were made of mild steel plateswith plan dimension 160 mm ×160 mm × 10 mm. The model piles used in this test were non-displacement piles of diameter 10 mm.Three lengths of piles were used in the experiment to represent slenderness ratio, L/D of 10, 15 and 20,respectively. The testing program includes tests on models of unpiled raft and rafts on 1, 4 and 9 piles. The influence of a number of piles and pile lengths on the load improvement ratio and foundation stiffness are presented and discussed. The results of the tests show that as the number of piles underneath the raft increases, load improvement ratio and foundation stiffness increases and percentage of load carried by the raft decreases.Theload improvement ratio and the foundation stiffness also increases with increase in pile length,while the pile length has a significant effect on the load carried by the raft. Keywords: Raft,Piles,piled raft,model test