REVIEW ON: PILE RAFT FOUNDATION SOIL STRUCTURE INTERSECTION EFFECT ON MULTISTOREY RC SHEAR WALL BUILDING

Abstract

A pile raft foundation is the combined action of the raft and piles. The design of a piled-raft
foundation allows the load to be shared between the raft and piles. In which the total load coming from the
superstructure is partly shared by the raft through contact with soil and the remaining load is shared by
piles through skin friction. For most piled raft foundation the purpose of the raft can increase the bearing
capacity & pile can reduce settlement, handle large eccentric loading. For the literature study we
concluded that piled raft foundation concept has significant advantages in comparison to conventional
foundation for the available soil strata. It is observed that stiffer the soil more will be the load shared by the
raft. In under lying soft sub soil profile to minimize the differential and overall settlement in piled raft
foundation due consideration must be given consolidation characteristics of the founding stratum .With
the increase in raft thickness the positive and negative bending moment of raft increases. It can be
concluded that pile dimension, raft dimension, different suitable method of pile group arrangement could
be incorporated in tentative design to make a most cost effective and efficient foundation system for a
prototype foundation system. Increasing number of piles decreases the total and ultimate settlement and
increases the total load carrying capacity up to certain limit that depend upon loading condition As the
position of shear wall changes the effect of shear force, bending moment and settlement changes.