Redistribution of Load between Soil and Piles underneath Piled Raft Foundation

摘要

The load that is carried by soil underneath piled raft is considered a focus of attention subject that took many researchers attention to solve and understand the complex interaction between the soil and piles underneath piles raft systems. In the present study, the load sharing, the way of the load distributed and mechanism between piles and soil are investigated and analyzed through a finite element numerical analysis. The analysis program consists of four groups of piles; first group is a pile cap with four piles. Second group is a pile cap with six piles. Third group is pile cap with nine piles and finally four group is pile cap with twelve piles. Each group is analyzed with respect to pile spacing at three diameters while keeping the pile length and diameter constant. It was concluded that, the values of load carried by pile underneath piled raft before redistribution were from 96.65% to 97.50% from total load. However, the values of load carried by soil underneath piled raft before redistribution were found to be from 2.50% to 3.35% from total load. In addition, most of loads carried by the soil underneath piled raft are redistributed and transferred to piles at the top half of pile lengths in two directions (x- and y). However, 71.00% to 95.50% from the load carried by soil underneath piled raft redistributed again to piles.