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<p>This study presents a theoretical framework for describing the load–deformation characteristics of stiffened deep cement mixing (SDCM) piles in both isolated piles and pile groups. To simplify the computational analysis, the equivalent pier method is employed to transform the SDCM piles or pile groups into a unified pier representation, thereby resolving the challenge of inconsistent calculation approaches for different pile types (including long-core, equal-core and short-core SDCM piles). A theoretical model according to the load transfer method is subsequently established to characterize the vertical bearing performance of these equivalent piers. In the theoretical framework, the exponential model is adopted to characterize the nonlinear behavior of the equivalent pier–soil interface, whereas the elastic–perfectly plastic model is adopted to characterize the interface compression characteristics of the pier bottom–soil interface. The calculation results in this article are highly consistent with previous onsite results, theoretical calculation results, and finite element results. Finally, the parameters (types of isolated SDCM piles, pile spacing <i>S</i><sub>ij</sub> and cement–soil depth <i>L</i><sub>c</sub>) are analyzed and studied using theoretical models.</p>

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Analytical model and numerical simulation for stiffened deep cement mixing piles under vertical load

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • Zhiyu Gong,
  • Haoran Ouyang,
  • Guoliang Dai,
  • Xinsheng Chen,
  • YuTeng Liu

摘要

This study presents a theoretical framework for describing the load–deformation characteristics of stiffened deep cement mixing (SDCM) piles in both isolated piles and pile groups. To simplify the computational analysis, the equivalent pier method is employed to transform the SDCM piles or pile groups into a unified pier representation, thereby resolving the challenge of inconsistent calculation approaches for different pile types (including long-core, equal-core and short-core SDCM piles). A theoretical model according to the load transfer method is subsequently established to characterize the vertical bearing performance of these equivalent piers. In the theoretical framework, the exponential model is adopted to characterize the nonlinear behavior of the equivalent pier–soil interface, whereas the elastic–perfectly plastic model is adopted to characterize the interface compression characteristics of the pier bottom–soil interface. The calculation results in this article are highly consistent with previous onsite results, theoretical calculation results, and finite element results. Finally, the parameters (types of isolated SDCM piles, pile spacing Sij and cement–soil depth Lc) are analyzed and studied using theoretical models.