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Influence of deep foundation pit excavation on surrounding environment: a case study in Nanjing, China

  • Research Article - Anthropogenic Geohazards
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Abstract

During the construction of deep and large foundation pits in floodplain areas, it is inevitable to cause stratum disturbance and endanger the safety of the surrounding environment. This paper focuses on the influence of deep foundation pit excavation on surrounding environment based on a soft soil deep foundation pit project in Nanjing floodplain area. A series of laboratory tests were conducted to obtain the parameters of the small strain hardening (HSS) model for the typical soil layers. Then PLAXIS 3D software is used to simulate the excavation process of the foundation pit. On the basis of field measurement and numerical model, the deformation characteristics of deep foundation pit and surrounding environment are analyzed. The HSS model and the appropriate model parameters can effectively simulate the deformation behavior during the excavation of the foundation pit. Aiming at the problem of excessive deformation of foundation pit and surrounding pipelines, the reinforcement effect of reinforced soil in active and passive areas under different reinforcement parameters is analyzed. The optimal reinforcement width and depth should be determined after reasonable analysis to obtain the best economic benefits.

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Acknowledgements

The authors gratefully acknowledge the financial support provided by the Natural Science Foundation of China under Grant No. 51978018, Beijing Natural Science Foundation Grant No. 8222004, Supported by R&D Program of China Construction Second Engineering Bureau Co. Ltd No.2021ZX000001, Science and Technology Funding Scheme for Three Companies of China Construction Bureau II No. CSCEC2b3c-2021-K-65.

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Authors and Affiliations

  1. Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing, 100124, China

    Chenhe Ge, Pengfei Li & Mingju Zhang

  2. China Construction Second Engineering Bureau LTD, Beijing, 100070, China

    Meng Yang

  3. The Third Construction Engineering Company LTD. of China, Construction Second Engineering Bureau, Beijing, 100070, China

    Meng Yang

Authors
  1. Chenhe Ge
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  2. Meng Yang
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  3. Pengfei Li
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  4. Mingju Zhang
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Correspondence to Pengfei Li.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Edited by Prof. Aderson Farias do Nascimento (CO-EDITOR-IN-CHIEF).

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Ge, C., Yang, M., Li, P. et al. Influence of deep foundation pit excavation on surrounding environment: a case study in Nanjing, China. Acta Geophys. 73, 495–516 (2025). https://doi.org/10.1007/s11600-024-01425-0

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  • DOI: https://doi.org/10.1007/s11600-024-01425-0

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