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The use of Cement Deep Mixing (CDM) columns has become increasingly common in the construction of deep excavations in soft soil conditions. CDM columns are employed both to improve the ground within the excavation area and to serve as retaining walls in construction projects involving one or more basement levels. The horizontal displacement of CDM walls serves as an important indicator of the stability of the excavation and the safety of adjacent structures. This study investigates the horizontal displacement behavior of CDM walls by varying the CDM replacement ratio in the improved zone. The analysis is conducted through a comparison between numerical results obtained using the finite element method and field data from 32 monitoring points. Based on this comparison, the study evaluates the influence of CDM replacement ratio on the displacement pattern of CDM walls in deep excavation projects.

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Displacement Analysis of CDM Retaining Walls with CDM Bottom-Enhanced Stability in Soft Ground Excavation in Ho Chi Minh City

  • 会议论文

  • 发表日期：

    2026年

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  • Thanh Nhan Pham,
  • Minh Trung Nguyen,
  • Khac Tan Da Nguyen,
  • Trong Nghia Le,
  • Trung Kien Nguyen,
  • Ha Dang Nguyen

摘要

The use of Cement Deep Mixing (CDM) columns has become increasingly common in the construction of deep excavations in soft soil conditions. CDM columns are employed both to improve the ground within the excavation area and to serve as retaining walls in construction projects involving one or more basement levels. The horizontal displacement of CDM walls serves as an important indicator of the stability of the excavation and the safety of adjacent structures. This study investigates the horizontal displacement behavior of CDM walls by varying the CDM replacement ratio in the improved zone. The analysis is conducted through a comparison between numerical results obtained using the finite element method and field data from 32 monitoring points. Based on this comparison, the study evaluates the influence of CDM replacement ratio on the displacement pattern of CDM walls in deep excavation projects.