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Computers and Concrete Volume 33, Number 5, May 2024 (Special Issue) pages 481-496 DOI: https://doi.org/10.12989/cac.2024.33.5.481 |
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Image-based characterization of internal erosion around pipe in earth dam |
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Dong-Ju Kim, Samuel OIamide Aregbesola, Jong-Sub Lee, Hunhee Cho and Yong-Hoon Byun
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| Abstract | ||
| 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. | ||
| Key Words | ||
| digital image correlation; displacement pattern; earth dam; failure mode; internal erosion | ||
| Address | ||
| Dong-Ju Kim, Jong-Sub Lee and Hunhee Cho: School of Civil, Environmental and Architectural Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea Samuel OIamide Aregbesola and Yong-Hoon Byun: Department of Agricultural Civil Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea | ||