University of Khartoum

VERIFICATION OF SIMPLIFIED APPROACH WITH NUMERICAL APPROACH IN ANALYSING PILED – RAFT FOUND ATIONS

 Title: VERIFICATION OF SIMPLIFIED APPROACH WITH NUMERICAL APPROACH IN ANALYSING PILED – RAFT FOUND ATIONS Author: Abaqi, Mohamed; Elarabi, Hussein Abstract: The c oncept of piled rafts combines the load bearing elements which includes piles, raft and soil in a composite structure. The interaction behavior between the various components of piled raft system is a complex geotechnical engineering problem which demands a robust analysis technique to accommodate such effects. Over the past decades a great number of different calculation methods have been developed to analyze the load – bearing behavior of piled rafts. The goal of this paper is to highlight the difference in the output between the simplified non - linear method of (Polous and Davis) and the plate on piles and continuum method. For that, a hypothetical example is analyzed using the two aforementioned analysis techniques. The latter approach necessitates the use of the finite element method which herein involved using the PLAXIS 3D FOUNDATION. The first approach was used to estimate the load – settlement pattern for different piled raft configurations which involved number of factors that influence the load – settlement criteria of the system namely the number of piles, piles length and piles diameter. The simplified method was followed by the (FEM) to verify the results obtained by the first method and to obtain the load distribution between the piles. It was noticed that the simplified method of (Polous and Davis) is suitable to predict the average settlement and the corresponding number of piles yet fall short to obtain any additional parameters. On the other hand, the (FEM) had the advantage to obtain the distributions of settlement, pile load and raft bending moment Description: VERIFICATION OF SIMPLIFIED APPROACH WITH NUMERICAL APPROACH IN ANALYSING PILED – RAFT FOUND ATIONS URI: http://hdl.handle.net/123456789/5058 Date: 2014-11-11
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