Geomechanics and Engineering

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Estimating the lateral profile of helical piles using modified p-y springs

  • Hyeong-Joo Kim (Department of Civil Engineering, Kunsan National University) ;
  • Hyeong-Soo Kim (Department of Civil and Environmental Engineering, Kunsan National University) ;
  • Peter Rey Dinoy (Renewable Energy Research Institute, Kunsan National University) ;
  • James Vincent Reyes (Department of Civil and Environmental Engineering, Kunsan National University) ;
  • Yeong-Seong Jeong (Department of Civil and Environmental Engineering, Kunsan National University) ;
  • Jun-Yong Park (Department of Civil and Environmental Engineering, Kunsan National University) ;
  • Kevin Bagas Arifki Mawuntu (Department of Civil and Environmental Engineering, Kunsan National University)
  • Received : 2022.11.25
  • Accepted : 2023.08.12
  • Published : 2023.10.10
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Abstract

A growing trend of utilizing helical piles for soft soil strata to support infrastructure projects is currently observed in Saemangeum, South Korea. Recognized mainly due to its ease of installation and reusability proves to be far more superior compared to other foundation types in terms of sustainability. This study applies modified p-y springs to characterize the behavior of a laterally loaded helical pile with a shaft diameter of 89.1 mm affixed with 3 helices evenly spaced along its embedded length of 2.5 m. Geotechnical soil properties are correlated from CPT data near the test bed vicinity and strain gauges mounted on the shaft surface. A modification factor is applied on the p-y springs to adjust the simulated data and match it to the bending moment, soil resistance and deflection values from the strain gauge measurements. The predicted lateral behavior of the helical pile through the numerical analysis method shows fairly good agreement to the recorded field test results.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF2021R1A6A1A1A03045185, Brain Korea 21 FOUR) and by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government (Ministry of Trade, Industry & Energy) (No.20214000000180)..

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