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Journal of Applied Sciences
  Year: 2010 | Volume: 10 | Issue: 13 | Page No.: 1320-1325
DOI: 10.3923/jas.2010.1320.1325
 
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Evaluation of Piled Raft Foundations Behavior with Different Dimensions of Piles

R. Ziaie-Moayed, M. Kamalzare and M. Safavian

Abstract:
In the present study, the behavior of piled raft foundation with different pile diameters is investigated under vertical loading. Piled-raft foundations for high-rise buildings have been proved to be an appropriate alternative instead of conventional pile or mat foundations. Piled raft foundation system is able to support the applied loading with an appropriate factor of safety and reduce the settlement of foundation. In some cases the piles are arranged uniformly and in other cases they are planned strategically to achieve uniform settlement. Piled raft foundation’s behavior has been investigated by many researches and the influence of some factor like pile lengths, pile distance, pile arrangement and cap thicknesses have been studied under vertical or horizontal static and dynamic loading. In this study, the raft, piles and supporting soil are modeled by a 3D finite element program. Using pile raft with different pile diameters in all types of soils, with unequal applied loads, has better operation than piled raft system with similar piles. But its behavior is not the same in all soils. Results show that the piled raft foundation with different pile diameters may be a good solution to reduce total and differential settlements if the bottom layer is a dense soil. If the bottom layer be a soft soil, using piled raft foundation with different pile diameters can’t be a good way to control maximum and differential settlement of raft system and structure. In this case, using other ways such as piled raft system with different lengths piles may be a good attitude to control the maximum and differential settlements.
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How to cite this article:

R. Ziaie-Moayed, M. Kamalzare and M. Safavian, 2010. Evaluation of Piled Raft Foundations Behavior with Different Dimensions of Piles. Journal of Applied Sciences, 10: 1320-1325.

DOI: 10.3923/jas.2010.1320.1325

URL: https://scialert.net/abstract/?doi=jas.2010.1320.1325

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