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Study on Spatiotemporal Evolution Laws and Deformation Characteristics of Circular Deep and Large Foundation Pits in Soft Soils

  • Research Article-Civil Engineering
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Abstract

With the increasing demand for large and deep anchor projects in soft soil areas, issues related to settlement in circular foundation pits and damage to supporting structures have become significantly pronounced. The absence of pertinent design methods significantly impacts construction safety. Through on-site monitoring and statistical analysis, this study examines the spatiotemporal evolution of deformation in circular foundation pits, the deformation characteristics of retaining structures, and surface settlement features. Key design factors influencing the stability of circular foundation pits are explored. The research indicates that structural deformation and surface settlement are closely related over time and exhibit substantial spatial coordination. The deformation control capability of circular foundation pits is considerably stronger than that of square foundation pits, and it is less influenced by excavation depth. Diameter and soft soil thickness have a substantial impact on structural deformation and surface settlement. When the diameter is less than 40 m, the structural deformation remains below 0.1%. The study establishes an evaluation method for the deformation control of large and deep circular foundation pits in soft soil based on a significant amount of engineering monitoring data. It categorizes deformation control indicators for pit excavation based on different design factors, offering reliable theoretical support for relevant design professionals.

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Acknowledgements

This work was supported by graduate research and innovation foundation of Chongqing, China (Grant No. CYS22047).

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, 83 Shabei Street, Shapingba District, Chongqing, 400045, China

    Hanzhi Liu, Xinrong Liu, Xiaohan Zhou, Linfeng Wang, Kexiao Wang, Jilu Zhang & Xueyan Guo

  2. National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing University, Chongqing, 400045, China

    Hanzhi Liu, Xinrong Liu, Xiaohan Zhou, Linfeng Wang, Kexiao Wang, Jilu Zhang & Xueyan Guo

  3. Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education, Chongqing University, Chongqing, 400045, China

    Hanzhi Liu, Xinrong Liu, Xiaohan Zhou, Linfeng Wang, Kexiao Wang, Jilu Zhang & Xueyan Guo

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  1. Hanzhi Liu
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Correspondence to Xinrong Liu or Xiaohan Zhou.

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To the best of our knowledge, the named authors of "Study on Spatiotemporal Evolution Laws and Deformation Characteristics of Circular Deep and large Foundation Pits in Soft Soils" have no conflict of interest, financial or otherwise.

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Liu, H., Liu, X., Zhou, X. et al. Study on Spatiotemporal Evolution Laws and Deformation Characteristics of Circular Deep and Large Foundation Pits in Soft Soils. Arab J Sci Eng (2024). https://doi.org/10.1007/s13369-023-08675-y

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