DOI QR코드

DOI QR Code

Effect of soil condition on the coefficient of lateral earth pressure inside an open-ended pipe pile

  • Ko, Junyoung (Department of Civil Engineering, Chungnam National University) ;
  • Jeong, Sangseom (School of Civil and Environmental Engineering, Yonsei University) ;
  • Seo, Hoyoung (Department of Civil, Environmental and Construction Engineering, Texas Tech University)
  • 투고 : 2022.03.03
  • 심사 : 2022.10.16
  • 발행 : 2022.10.25

초록

Finite element analyses using coupled Eulerian-Lagrangian technique are performed to investigate the effect of soil conditions on plugging of open-ended piles in sands. Results from numerical simulations are compared against the data from field load tests on three open-ended piles and show very good agreement. A parametric study focusing on determination of the coefficient of lateral earth pressure (K) in soil plug after pile driving are then performed for various soil densities, end-bearing conditions, and layering conditions. Results from the parametric study suggest that the K value in the soil plug - and hence the degree of soil plugging - increases with increasing soil densities. The analysis results further show that the K value within the soil plug can reach about 63 to 71% of the coefficient of passive earth pressure after pile driving. For layered soil profiles, the greater K values are achieved after pile driving when the denser soil layer is present near the pile base regardless of number of soil layers. This study provides comprehensive numerical and experimental data that can be used to develop advanced theory for analysis and design of open-ended pipe piles, especially for estimation of inner shaft resistance after pile driving.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1F1A1076193 and 2022R1C1C1011477).

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