Experimental and numerical analysis of piled raft foundation with different length of piles under static loads

Abstract EN

In order to understand the effect of (length of pile / diameter of pile) ratio on the load carrying capacity and settlement reduction behavior of piled raft resting on loose sand, laboratory model tests were conducted on small-scale models.

The parameters studied were the effect of pile length and the number of piles.

The load settlement behavior obtained from the tests has been validated by using 3-D finite element in ABAQUS program, was adopted to understand the load carrying response of piled raft and settlement reduction.

The results of experimental work show that the increase in (Lp / dp) ratio led to increase in load carrying capacity by piled raft from (19.75 to 29.35 %, to 28.87 %) and (0 to 16.49 %), the maximum load carried by piles decrease from (9.1 to 22.72 %), (15.79 to 47.3 %) and (44 to 81.05 %) and the response of settlement piled raft decrease from (16.67 to 23.33 %), (9.09 to 39.39 %) and (30 %) with increase the number of piles from 4 to (6 and 9) and (length of pile / diameter of pile) ratio increase to (14.14 and 21.2) respectively.

The numerical and model test results are found to be in a good agreement.