A study of settlement behaviour of piled raft foundation using PLAXIS 3D
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Date
2022-10
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G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
Abstract
A Pile Raft foundation is a type of geotechnical foundation that consists of three components: the raft, the piles and the soil domain. Piled raft foundations (PRF) are commonly used under high-rise buildings and other heavy structures because of their effective load transfer mechanism, which allows the superstructure loads to be partially carried by the raft and partially by the piles. In the present study, an effort to figure out settlement response of a piled raft foundation on a multi layered soil by varying raft thickness, length of piles and diameter of piles by using PLAXIS 3D is made. Settlement at different loading rate have also been observed using the software and a load v/s settlement response has been plotted. PLAXIS 3D which is based on finite element method was used to analyse this complex problem of soil structure interaction and settlement was calculated. It was found that raft thickness has no significant effect on the load settlement relationship of a piled raft foundations either on small settlements or on large settlement levels. A significant decrease in settlement was also observed with increase in length and diameter of pile.