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<p>Earthquake-induced liquefaction poses significant risks to pile-supported structures in marine sedimentary environments. This paper investigates the seismic behavior of rigid drainage pile groups in liquefiable laterally spreading sites through a series of scaled shaking table tests. The effect of pile spacing (1–1.5<i>D</i>), soil relative density (40–70%), and the distance from the side pile to the bank wall (60–125&#xa0;mm) were investigated. Results show that rigid drainage piles effectively reduce excess pore pressure ratios (EPPRs) by up to 40% compared to ordinary piles. Larger pile spacings (1.5<i>D</i>) increase EPPRs by 12–15% and bank wall displacements by 22%, whereas denser soil (e.g., relative density of 70%) reduces displacements by 15–27%. Increasing the bank wall distance can diminish the acceleration amplification coefficient and pore water pressure accumulation. Notably, bending moments in rigid drainage pile groups are 10–70% lower than those in ordinary pile groups, with maximum stresses on rear piles due to soil flow. These findings highlight the superior anti-liquefaction efficacy of rigid drainage piles and provide optimal design guidelines for seismic-prone regions.</p>

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Seismic response of rigid drainage pile groups in liquefied lateral spreading sites

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Xin Gu,
  • Xuanming Ding,
  • Zhibo Chen,
  • Guangwei Cao,
  • Dawei Zhang

摘要

Earthquake-induced liquefaction poses significant risks to pile-supported structures in marine sedimentary environments. This paper investigates the seismic behavior of rigid drainage pile groups in liquefiable laterally spreading sites through a series of scaled shaking table tests. The effect of pile spacing (1–1.5D), soil relative density (40–70%), and the distance from the side pile to the bank wall (60–125 mm) were investigated. Results show that rigid drainage piles effectively reduce excess pore pressure ratios (EPPRs) by up to 40% compared to ordinary piles. Larger pile spacings (1.5D) increase EPPRs by 12–15% and bank wall displacements by 22%, whereas denser soil (e.g., relative density of 70%) reduces displacements by 15–27%. Increasing the bank wall distance can diminish the acceleration amplification coefficient and pore water pressure accumulation. Notably, bending moments in rigid drainage pile groups are 10–70% lower than those in ordinary pile groups, with maximum stresses on rear piles due to soil flow. These findings highlight the superior anti-liquefaction efficacy of rigid drainage piles and provide optimal design guidelines for seismic-prone regions.