A study on the behavior of pile supported footings on sand

Abstract

When the bearing capacity is not adequate to provide isolated footings, columns are grouped and supported combined footing. However, if the settlement increases beyond the permissible limits, piles are provided below the combined footing, applying the concept of piled raft. In this case the piles function as settlement reducers. Such systems can be categorized as a particular case of the combined piled raft system. In the present study a typical case of a piled raft with relatively smaller width, supported on two rows of piles on the edges was studied with small scale 1g model tests for understanding the basic behavior and a numerical study to obtain the details of raft settlement and the shaft stress distribution along the pile length.