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<p>The current research on CFG pile composite foundations primarily focuses on rigid foundations. However, there is a significant gap in the analysis of flexible foundations, particularly for specialized foundations such as tailings sand. This study investigates the behavior of CFG pile composite foundations under saturated tailings sand conditions through model testing. The results show that under vertical loading, settlement occurs rapidly, with the maximum settlement ranging between 5.98&#xa0;mm and 6.12&#xa0;mm after graded loading. Pore water pressure decreases with depth, with the shallow layer showing a reduction of 19–68% and the deeper layer exhibiting a reduction of 30–85%. The soil pressure is highest at the pile top, with increases ranging from 3.24 to 7.34%. These findings highlight the role of CFG piles in effectively distributing load and controlling settlement under both loading and drainage conditions, providing valuable data for engineering applications in tailings sand foundations.</p>

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Model test study on mechanical response and settlement characteristics of CFG pile group in tailing sand foundation

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Tong Liu,
  • Zhe Li,
  • Yanru Xing,
  • Lulu Liu,
  • Xiaoyan Liu,
  • Guojun Cai

摘要

The current research on CFG pile composite foundations primarily focuses on rigid foundations. However, there is a significant gap in the analysis of flexible foundations, particularly for specialized foundations such as tailings sand. This study investigates the behavior of CFG pile composite foundations under saturated tailings sand conditions through model testing. The results show that under vertical loading, settlement occurs rapidly, with the maximum settlement ranging between 5.98 mm and 6.12 mm after graded loading. Pore water pressure decreases with depth, with the shallow layer showing a reduction of 19–68% and the deeper layer exhibiting a reduction of 30–85%. The soil pressure is highest at the pile top, with increases ranging from 3.24 to 7.34%. These findings highlight the role of CFG piles in effectively distributing load and controlling settlement under both loading and drainage conditions, providing valuable data for engineering applications in tailings sand foundations.