ANALYSIS OF PILED RAFT FOUNDATION

Abstract

Extensive research work has been performed in the past to examine the behavior of piled rafts. If the clay layer has poor shear strength, the residential building is supported by load bearing piles which transfers all load to a deeper competent layer of soil. This is most reliable solution but the cost of piles foundation could be very high owing to the large pile length which may be required. Residential buildings generally require raft foundation if the underlying soil consists of soft clay strata or loose sand in top layer. In these conditions, the main problem with foundation is high settlement due to a large zone of influence of the raft owing to its dimension and low bearing capacity. Owing to the high cost of land in urban areas, the normal tendency is to utilize all the available land for construction. In such a situation where it becomes necessary to reduce settlements, the piled-raft is the best alternative. In this present work, an attempt has been made to study the settlem...