Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (5): 1506-1513.doi: 10.13278/j.cnki.jjuese.20200270

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Influence of New Pile Penetration on Adjacent Reused Pile

Cui Jifei1, Rao Pingping1, Li Jingpei2   

  1. 1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2. College of Civil Engineering, Tongji University, Shanghai 200092, China
  • Received:2020-11-21 Online:2021-09-26 Published:2021-09-29
  • Supported by:
    Supported by the National Natural Science Foundation of China (41972274)

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Abstract: The cavity expansion theory of semi-infinite soil is adopted to obtain the displacement field of soil caused by the new pile driving, and then it is applied to the existing pile based on the two-stage method to analyze the deformation and internal force changes of the existing pile. The constraint condition of the existing pile bottom, the rigidity of the pile body, and the soil modulus on the response of the existing pile was studied, meanwhile, the theoretical method was verified by using the numerical analysis, and also the influence of the distance between the new and used piles and the radius of the new piles was analyzed. The results show that the constraint of the pile tip only affects the deformation of the pile body near the pile tip:With the increase of the distance between the new and old piles, the deformation and internal force of the existing piles decrease significantly; The deformation and internal force of the existing pile increase gradually with the increase of the new pile diameter. The measures to stay away from existing piles and using long and thin piles are proposed to reduce the impact of new pile construction on existing piles.

Key words: existing pile, reuse, penetration, compaction displacement, deformation

CLC Number: 

  • TU473
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