Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Behavior of Lateral Resistance according to Embed Depth of Pile for the Wind Power Foundation Reinforced with Piles in the Rocky Layer

암반지반에서 말뚝으로 보강된 풍력발전 기초의 말뚝 근입깊이에 따른 수평저항력 거동

  • Kang, Gichun (Department of Civil Engineering, College of Engineering, Gyeongsang National University) ;
  • Kim, Dongju (Corporate Partnership Center, Korea Authority of Land & Infrastructure Safety) ;
  • Park, Jinuk (Department of Civil Engineering, College of Engineering, Gyeongsang National University) ;
  • Euo, Hyunjun (Department of Civil Engineering, College of Engineering, Gyeongsang National University) ;
  • Park, Hyejeong (Department of Civil Engineering, College of Engineering, Gyeongsang National University) ;
  • Kim, Jiseong (Department of Cadastre & Civil Engineering, Vision College of Jeonju)
  • Received : 2022.05.01
  • Accepted : 2022.06.21
  • Published : 2022.06.30
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Abstract

This study conducted to obtain the lateral resistance of a wind power foundation reinforced with piles through an model experiment. In particular, the lateral resistance of the foundation was compared with the existing gravity-type wind power foundation by integrating the pile, the wind power generator foundation, and the rocky ground. In addition, changes in the lateral resistance and bending moment of the pile were analyzed by embeded depths of the pile. As a result, it was found that the lateral resistance increased with the depth of embedment of the piles. In particular, the pile's resistance increase ratio was 2.11 times greater in the case where the pile embedded up to the rock layer than the case where the pile was embedded into the riprap. It was found that the location of the maximum bending moment occurred at the interface between the wind turbine foundation and the riprap layer when the pile embeded to the rock layer. Through this, as the lateral resistance of the wind power foundation reinforced with piles is greater than that of the existing gravity-type wind power foundation, it is understood that it can be a more advantageous construction method in terms of safety.

본 연구는 말뚝으로 보강된 풍력발전기초의 수평저항력을 실내모형실험을 통해 구하였다. 특히 말뚝과 풍력발전기초 및 암반지반을 일체화시켜 기존의 중력식 풍력발전기초와의 수평저항력을 비교하였다. 또한 말뚝의 근입깊이를 달리하여 말뚝의 수평저항력 및 휨모멘트의 변화를 분석하였다. 그 결과 말뚝의 근입깊이가 깊어짐에 따라 수평저항력이 커짐을 알 수 있었다. 특히 암석층까지 말뚝이 근입된 경우가 사석층까지 근입된 경우보다 말뚝의 저항력 증가비가 2.11배 크게 나타났다. 말뚝이 암반지반까지 근입될 경우 최대 휨모멘트의 발생위치는 풍력발전기초와 사석층의 경계면에서 나타남을 알 수 있었다. 이를 통해 기존 중력식 풍력발전 기초보다 말뚝으로 보강된 풍력발전 기초의 수평저항력이 크게 나타남에 따라 안전성 측면에서 더 유리한 시공방법이 될 수 있을 것으로 파악된다.

Keywords

Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(NRF-2020R1I1A3067248).

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