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In this study, displacement controlled reduced-scale model tests are performed to examine the effect of granular cushion on the performance of 3 × 3 disconnected piled raft (DPR) foundation in sand. For this, different thickness of cushion is considered. The test results confirm a decreasing trend in both the load carrying capacity and Settlement Efficiency (η) of the DPR with increasing cushion thickness. Interestingly, negative skin friction of lower magnitude is found to prevail in the upper part of the disconnected piles. The disconnected piles, however, are found to carry approximately 34% of the total load.

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Influence of Granular Cushion on the Performance of Disconnected Piled Raft

  • 会议论文

  • 发表日期：

    2025年

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  • Prasun Halder,
  • Bappaditya Manna

摘要

In this study, displacement controlled reduced-scale model tests are performed to examine the effect of granular cushion on the performance of 3 × 3 disconnected piled raft (DPR) foundation in sand. For this, different thickness of cushion is considered. The test results confirm a decreasing trend in both the load carrying capacity and Settlement Efficiency (η) of the DPR with increasing cushion thickness. Interestingly, negative skin friction of lower magnitude is found to prevail in the upper part of the disconnected piles. The disconnected piles, however, are found to carry approximately 34% of the total load.