Devesh Ojha, Research scholar,
Civil Department, Shri Ramswaroop University, Lucknow, India
Prof. (Dr.) Rajendra Kumar Srivastava
Retired Engineer in Chief UP P.W.D. and Retired M.D. U.P. Bridge Corporation, India.
Comparison of Raft and Pile Raft Foundation as Sustainable Options for Foundation Design for High Rise Buildings in Alluvial Region
Authors
Abstract
In this age of rapid growth in population in India, there is scarcity of land in prime locations
especially in metro cities of the country. So, to overcome this problem we are moving towards
vertical constriction (that is towards high rise buildings). The main problem in moving towards
vertical construction is foundation system, if the foundation system in high rise buildings is not plan
and designed smartly and economically then there are different problems related to foundation
system that is going to arise, the soil in that area also plays a very important role in designing of
economical and stable foundation system. It is always beneficial to have a raft foundation on alluvial
soil for high rise buildings. But, however, it is a matter of great concern that what foundation will be
proposed on such type of natural soils or man-made refills [12]. In this paper, an attempt has been
made to design a raft foundation based on its geotechnical analysis. An extensive survey of research
works devoted to study the geotechnical parameters affecting the behavior of raft foundation is
carried out with detailed experiments raft foundations are increasingly being recognized as an
economical and effective foundation system for high rise buildings. This paper sets out some
principles of design for such foundations, including design for the geotechnical ultimate limit state,
the structural ultimate limit state, and the serviceability limit state. Attention will be focused on the
improvement in the foundation performance due to the raft being in contact with, and embedded
within, the soil.