1g Model Study on the Behavior of Piled Raft Foundation

Author(s):

Aleena Tom , Saintgits College of Engineering; Sindhu A R, Saintgits College of Engineering

Keywords:

Combined Piled Raft Foundation, Model Study, Numerical Modeling, Plaxis 3D, Settlement Ratio

Abstract:

Combined piled raft foundation is an efficient foundation for medium rise buildings in which the superimposed load is transferred to the soil by the combined action of pile and raft and facilitates settlement reduction. Raft and pile are combined in a view to reduce the overall settlement of the structure. In this paper, 1g model study is conducted on piled raft foundation subjected to vertical axial loading. The foundation medium adopted is a layered soil profile. As a result of experimental model study, load- settlement graphs are plotted for various configurations of piled raft where the arrangement, length and spacing of piles are varied. The thickness of raft is kept constant as it has less influence on the capacity. Numerical modeling is done in Plaxis 3D software to validate the results. The major parameter used in this study to identify the best piled raft configuration is the settlement ratio. As a result of the study, when the number of piles increases settlement ratio decreases and becomes negligible beyond a 4x4 pile arrangement, where the spacing between the piles is 3.75D, where ‘D’ is the diameter of the pile.

Other Details:

Manuscript Id	:	IJSTEV3I2113
Published in	:	Volume : 3, Issue : 2
Publication Date	:	01/09/2016
Page(s)	:	324-328

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