Geomechanics and Engineering

  • 제38권5호
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  • Pages.487-495
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  • 2024
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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Evaluation of dynamic earth pressure acting on pile foundation in liquefiable sand deposit by shaking table tests

  • Mintaek Yoo (Departemnt of Civil and Environmental Engineering, Gachon Univeristy) ;
  • Seongwon Hong (Department of Safety Engineering, Korea National University of Transportation)
  • 투고 : 2023.11.23
  • 심사 : 2024.02.23
  • 발행 : 2024.09.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a series of shaking table model tests were performed to evaluate the dynamic earth pressure acting on pile foundation during liquefaction. The dynamic earth pressure acting on piles were evaluated with depth and pile diameters comparing with excess pore water pressure, it means that the kinematic load effect plays a substantial role in dynamic pile behavior during liquefaction. The dynamic earth pressure acting on pile foundations with mass exhibited significant similarity to those without upper mass. Analyzing the non-fluctuating and fluctuating components of both excess pore water pressure and dynamic earth pressure revealed that the non-fluctuating component has a dominant influence. In case of non-fluctuating component, dynamic earth pressure is larger than excess porewater pressure at same depth, and the difference increased with depth and pile diameter. However, in the case of the fluctuating component, the earth pressure tended to be smaller than the excess pore water pressure as the depth increased. Based on the results of a series of studies, it can be concluded that the dynamic earth pressure acting on the pile foundation during liquefaction is applied up to 1.5 times the excess pore water pressure for the non-fluctuating component and 0.75 times the excess pore water pressure for the fluctuating component.

키워드

과제정보

This research was supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant No. RS-2023-00238458) and the MidCareer Researcher and Young Researcher Program through the National Research Foundation of Korea (NRF) funded by the Korea government (MSIT; Ministry of Science and ICT) (2023R1A2C2006400, 2021R1C1C1010087) and Basic Science Research Program through the NRF funded by the Ministry of Education (2021R1A4A2001964). We greatly appreciate the support.

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