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<p>In this study, a cement–soil mixing pile with a wedge-shaped enlarged head is presented to make reasonable use of the bearing characteristics of the pile. First, a model of a composite foundation with cement–soil mixing piles with wedge-shaped enlarged heads is designed, and an experiment involving the model is carried out. The bearing characteristics of composite foundations with cement–soil mixing piles with wedge-shaped enlarged heads are studied, including the load–settlement behaviour, the pile‒soil stress ratio, and the pile body strain. A numerical simulation of the model of a composite foundation with cement–soil mixing piles with wedge-shaped enlarged heads is then carried out via the finite element method. The influences of different shapes and sizes of cement–soil mixing piles with wedge-shaped enlarged heads on the stress and deformation levels of composite foundations are studied. Finally, the presented cement–soil mixing pile with a wedge-shaped enlarged head is applied to a practical engineering project. The results show that the composite foundation bearing capacities of cement–soil mixing piles with wedge-shaped enlarged heads are significantly greater than those of conventional cement–soil mixing piles. Under a typical working load of 10 kN, the settlement of the composite foundation of cement–soil mixing piles with wedge-shaped enlarged heads was approximately 8.1&#xa0;mm, compared to 14.6&#xa0;mm for the conventional cement–soil mixing piles with equal replacement rates. This represents a reduction in settlement of approximately 45%.</p>

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Bearing Characteristics of Composite Foundations with Cement–Soil Mixing Piles with Wedge-Shaped Enlarged Heads

  • 期刊论文

  • 发表日期：

    2026年1月14日

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  • Fengyuan Wu,
  • Peng Liu,
  • Yong Wang,
  • Xuezhuang Ji,
  • Zihao Zhao,
  • Yueguo Zhang

摘要

In this study, a cement–soil mixing pile with a wedge-shaped enlarged head is presented to make reasonable use of the bearing characteristics of the pile. First, a model of a composite foundation with cement–soil mixing piles with wedge-shaped enlarged heads is designed, and an experiment involving the model is carried out. The bearing characteristics of composite foundations with cement–soil mixing piles with wedge-shaped enlarged heads are studied, including the load–settlement behaviour, the pile‒soil stress ratio, and the pile body strain. A numerical simulation of the model of a composite foundation with cement–soil mixing piles with wedge-shaped enlarged heads is then carried out via the finite element method. The influences of different shapes and sizes of cement–soil mixing piles with wedge-shaped enlarged heads on the stress and deformation levels of composite foundations are studied. Finally, the presented cement–soil mixing pile with a wedge-shaped enlarged head is applied to a practical engineering project. The results show that the composite foundation bearing capacities of cement–soil mixing piles with wedge-shaped enlarged heads are significantly greater than those of conventional cement–soil mixing piles. Under a typical working load of 10 kN, the settlement of the composite foundation of cement–soil mixing piles with wedge-shaped enlarged heads was approximately 8.1 mm, compared to 14.6 mm for the conventional cement–soil mixing piles with equal replacement rates. This represents a reduction in settlement of approximately 45%.