Volume 38 Issue 6
Dec.  2024
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2024  >  38(6): 704-711
Wang Caikou, Huang Tao, Chang Wei, Wang Haiyuan, Pu Shikun, Zhai Yongyong. Influence of New Pier Construction on Adjacent Existing High Speed Railway Pier Foundation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(6): 704-711. doi: 10.3969/j.issn.1007-2993.2024.06.010
Citation: Wang Caikou, Huang Tao, Chang Wei, Wang Haiyuan, Pu Shikun, Zhai Yongyong. Influence of New Pier Construction on Adjacent Existing High Speed Railway Pier Foundation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(6): 704-711. doi: 10.3969/j.issn.1007-2993.2024.06.010
shu

Influence of New Pier Construction on Adjacent Existing High Speed Railway Pier Foundation

doi: 10.3969/j.issn.1007-2993.2024.06.010
  • 1.

    The First Geological Brigade of Jiangsu Geological Bureau, Nanjing 210098, Jiangsu, China

  • 2.

    School of Defense Engineering, Army University of Engineering, Nanjing 210098, Jiangsu, China

  • 3.

    Nanjing Survey Engineering Co., Ltd., Nanjing 210098, Jiangsu, China

  • Received Date: 2023-11-16
  • Accepted Date: 2024-05-09
  • Rev Recd Date: 2024-04-18
  • Publish Date: 2024-12-06
    Abstract
  • To study the influence of new pier construction on adjacent high-speed rail pier foundation, the whole construction process calculation model of the new pier was established based on the hardening soil model with small-strain stiffness (HSS model) and PLAXIS 3D finite element software, and then the soil displacement characteristics of adjacent existing high-speed rail pier foundation were analyzed. The reliability of the finite element model was verified by compared with the field monitoring data. The displacement of the pier and pile was calculated and analyzed. The results show that the HSS model is helpful to obtain more reliable displacement results in finite element calculation. In terms of soil mass, the maximum horizontal displacement and settlement are 1.53 mm and 5.49 mm in the horizontal direction of the foundation pit. The maximum settlement of the existing pier and cap is less than 6 mm, and the total settlement of the pier cap and the differential settlement of the adjacent pier cap is less than the standard limit. The outer top of the pile group of the existing pile foundation has a displacement to the four sides, while the top of the middle pile has a small settlement and bears the "open pattern" displacement state. During the construction of the new pier, the construction of the new bored pile, the insertion of the steel sheet pile, and the backfilling of the foundation pit have a great influence on the horizontal displacement and settlement of the existing high-speed railway pier foundation.

     

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