DOI QR코드

DOI QR Code

Image-based characterization of internal erosion around pipe in earth dam

  • Dong-Ju Kim (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Samuel OIamide Aregbesola (Department of Agricultural Civil Engineering, Kyungpook National University) ;
  • Jong-Sub Lee (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Hunhee Cho (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Yong-Hoon Byun (Department of Agricultural Civil Engineering, Kyungpook National University)
  • 투고 : 2023.12.25
  • 심사 : 2024.03.12
  • 발행 : 2024.05.25

초록

Internal erosion around pipes can lead to the failure of earth dams through various mechanisms. This study investigates the displacement patterns in earth dam models under three different failure modes due to internal erosion, using digital image correlation (DIC) methods. Three failure modes—erosion along a pipe (FM1), pipe leakage leading to soil erosion (FM2), and erosion in a pipe due to defects (FM3)—are analyzed using two- and three-dimensional image- processing techniques. The internal displacement of the cross-sectional area and the surface displacement of the downstream slope in the dam models are monitored using an image acquisition system. Physical model tests reveal that FM1 exhibits significant displacement on the upper surface of the downstream slope, FM2 shows focused displacement around the pipe defect, and FM3 demonstrates increased displacement on the upstream slope. The variations in internal and surface displacements with time depend on the segmented area and failure mode. Analyzing the relationships between internal and surface displacements using Pearson correlation coefficients reveals various displacement patterns for the segmented areas and failure modes. Therefore, the image-based characterization methods presented in this study may be useful for analyzing the displacement distribution and behavior of earth dams around pipes, and further, for understanding and predicting their failure mechanisms.

키워드

과제정보

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2021R1A5A1032433).

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