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Numerical Analysis of Block Type Quay Wall with Piles for Restraining Horizontal Deformation

말뚝 결합 블록식 안벽의 수평변위 억제에 대한 수치해석 연구

  • Soon-Goo Kwon (Dept. of Civil and Environmental Engineering, Korea Maritime and Ocean University) ;
  • Won-Hyo Lee (Dept. of Civil and Environmental Engineering, Korea Maritime and Ocean University) ;
  • Tae-Hyung Kim (Dept. of Civil Engineering, Korea Maritime and Ocean University)
  • 권순구 (한국해양대학교 대학원 토목환경공학과) ;
  • 이원효 (한국해양대학교 대학원 토목환경공학과) ;
  • 김태형 (한국해양대학교 토목공학과)
  • Received : 2023.12.04
  • Accepted : 2023.12.26
  • Published : 2023.12.31

Abstract

A two-dimensional numerical analysis was performed on the depth of pile embedment, the magnitude of the residual water level, and the condition of the presence or absence of cap concrete to understand the behavior of the block-type quay wall with piles. The results showed the control effect of the lateral displacement of the quay wall depending on the embedment of the pile. When the piles were not embedded, the lateral displacement of the quay wall increased proportionally as the residual water level difference increased. In contrast, when the piles were embedded into the ground, the control of the lateral displacement of the quay wall was greatly exerted even if the residual water level difference increased. There was little difference in the lateral displacement of the block-type quay wall regardless of the presence or absence of cap concrete. Under the condition where the piles were embedded down to the rubble mound layer, the piles exhibited the rotational behavior seen in the short piles. As the embedment depth of the piles increased, the piles showed the same bending behavior as the intermediate piles. Thus, the piles significantly contribute to the control of lateral displacement in the block-type quay wall with piles.

말뚝이 결합된 블록식 안벽의 말뚝 근입깊이의 영향에 따른 거동파악을 하기 위해 잔류수위차 크기와 상치 콘크리트 유무 조건에 대하여 2차원 수치해석을 실시하였다. 수치해석 결과, 말뚝의 근입에 따라 안벽의 수평변위의 억제 효과가 나타나는 것을 확인하였으며, 말뚝이 사석층까지 근입된 경우에서 수평변위 억제 효과가 가장 크게 나타났다. 말뚝이 근입되지 않은 조건에서는 잔류수위차가 증가함에 따라 안벽의 수평변위도 비례적으로 증가하는 것으로 나타났다. 하지만 말뚝이 지반에 근입된 경우 잔류수위차가 증가하더라도 안벽의 수평변위에 대한 제어가 크게 발휘되었다. 상치콘크리트 유·무에 따른 블록식 안벽의 수평변위는 차이가 거의 없는 것으로 나타났다. 말뚝의 근입깊이가 사석층까지 근입된 경우 조건에서는 말뚝이 짧은 말뚝에서 보이는 회전 거동을 보이는 것으로 나타났다. 말뚝의 근입깊이가 더 깊어짐에 따라 중간 말뚝의 거동과 같은 휨거동 양상을 보이는 것으로 해석되어 말뚝이 결합된 블록식 안벽에서 말뚝이 수평변위 억제에 크게 기여하는 것을 알 수 있다.

Keywords

References

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