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<p>Rapid urbanization and intense underground development have led to widespread pipeline networks. Consequently, frequent jacked pile construction near existing pipelines threatens safety due to soil displacement effects. Although environmentally friendly, jacked pile penetration causes substantial soil disturbance, particularly in soft soils. However, previous studies evaluating these impacts often simplify the ground surface as a free boundary, neglecting the substantial self-weight of the jacking equipment. This massive surcharge reshapes the initial stress field and forms a complex coupling effect with the subsequent soil extrusion. Ignoring this boundary condition leads to critical deviations in pipeline risk assessments. Furthermore, while some studies account for the machine self-weight, its specific installation effects on adjacent horizontal infrastructure remain systematically under-investigated. This study investigates buried PE pipe deformation under jacked pile construction considering machine self-weight via model tests and simulations. The results demonstrate that considering the machine’s self-weight leads to a 59% increase in peak horizontal displacement at the pipeline span midpoint. Notably, the peak Von Mises stress location on the midpoint section shifts significantly: from 315–337.5° and 135° in MS1 (without considering machine self-weight), to an initial position of 292.5° and 157.5° in MS2 (with machine self-weight), which eventually transitions to 315° and 157.5°. In terms of magnitude, the maximum Von Mises stress increases by 24.3%. Furthermore, deformation characteristics shift from a transient peak to continuous accumulation. Parametric analysis identifies pile-to-pipe distance as the primary controlling factor; increasing pipe diameter suppresses cross-sectional ovalization, while greater burial depth amplifies overall horizontal displacement.</p>

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Soil Compaction Effects Induced by Jacked Piles and Machine Self-Weight on Adjacent Buried Pipelines

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Zhiqiang Li,
  • Rongyuea Zheng,
  • Yuebao Deng,
  • Haobo Jin

摘要

Rapid urbanization and intense underground development have led to widespread pipeline networks. Consequently, frequent jacked pile construction near existing pipelines threatens safety due to soil displacement effects. Although environmentally friendly, jacked pile penetration causes substantial soil disturbance, particularly in soft soils. However, previous studies evaluating these impacts often simplify the ground surface as a free boundary, neglecting the substantial self-weight of the jacking equipment. This massive surcharge reshapes the initial stress field and forms a complex coupling effect with the subsequent soil extrusion. Ignoring this boundary condition leads to critical deviations in pipeline risk assessments. Furthermore, while some studies account for the machine self-weight, its specific installation effects on adjacent horizontal infrastructure remain systematically under-investigated. This study investigates buried PE pipe deformation under jacked pile construction considering machine self-weight via model tests and simulations. The results demonstrate that considering the machine’s self-weight leads to a 59% increase in peak horizontal displacement at the pipeline span midpoint. Notably, the peak Von Mises stress location on the midpoint section shifts significantly: from 315–337.5° and 135° in MS1 (without considering machine self-weight), to an initial position of 292.5° and 157.5° in MS2 (with machine self-weight), which eventually transitions to 315° and 157.5°. In terms of magnitude, the maximum Von Mises stress increases by 24.3%. Furthermore, deformation characteristics shift from a transient peak to continuous accumulation. Parametric analysis identifies pile-to-pipe distance as the primary controlling factor; increasing pipe diameter suppresses cross-sectional ovalization, while greater burial depth amplifies overall horizontal displacement.