Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks
In recent years, as the number of reservoir embankments constructed has increased, embankment failures due to cracks in aging conduits have also increased. In this study, a crack in a conduit was modeled based on the current conduit design model, and the risk of internal erosion was analyzed using a...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/2/567 |
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| author | Young-Hak Lee Jung-Hyun Ryu Joon Heo Jae-Woong Shim Dal-Won Lee |
| author_facet | Young-Hak Lee Jung-Hyun Ryu Joon Heo Jae-Woong Shim Dal-Won Lee |
| author_sort | Young-Hak Lee |
| collection | DOAJ |
| description | In recent years, as the number of reservoir embankments constructed has increased, embankment failures due to cracks in aging conduits have also increased. In this study, a crack in a conduit was modeled based on the current conduit design model, and the risk of internal erosion was analyzed using a large-scale model test and three-dimensional deformation–seepage analysis. The results show that when cracks existed in the conduit, soil erosion and cavitation occurred near the crack area, which made the conduit extremely vulnerable to internal erosion. Herein, a model is proposed that can reduce internal erosion by applying a layer of sand and geotextiles on the upper part of the conduit located close to the downstream slope. In the proposed model, only partial erosion occurred inside the conduit, and no cavitation appeared near the crack in the conduit. The results suggest that internal erosion can be suppressed when the water pressure acting intensively on the crack in the conduit is dispersed by the drainage layer. To validate these results, the pore water pressure, seepage line, and hydraulic gradient were investigated to confirm the erosion phenomenon and reinforcement effect. |
| first_indexed | 2024-03-10T01:59:40Z |
| format | Article |
| id | doaj.art-3cf17ad1186846d4994b4c702b2c2ce5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:59:40Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3cf17ad1186846d4994b4c702b2c2ce52023-11-23T12:49:12ZengMDPI AGApplied Sciences2076-34172022-01-0112256710.3390/app12020567Stability Improvement Method for Embankment Dam with Respect to Conduit CracksYoung-Hak Lee0Jung-Hyun Ryu1Joon Heo2Jae-Woong Shim3Dal-Won Lee4Institute of Agricultural Science, Chungnam National University, Daejeon 34134, KoreaDepartment of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, KoreaRural Research Institute, Korea Rural Community Corporation, Ansan 15634, KoreaRural Research Institute, Korea Rural Community Corporation, Ansan 15634, KoreaDepartment of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, KoreaIn recent years, as the number of reservoir embankments constructed has increased, embankment failures due to cracks in aging conduits have also increased. In this study, a crack in a conduit was modeled based on the current conduit design model, and the risk of internal erosion was analyzed using a large-scale model test and three-dimensional deformation–seepage analysis. The results show that when cracks existed in the conduit, soil erosion and cavitation occurred near the crack area, which made the conduit extremely vulnerable to internal erosion. Herein, a model is proposed that can reduce internal erosion by applying a layer of sand and geotextiles on the upper part of the conduit located close to the downstream slope. In the proposed model, only partial erosion occurred inside the conduit, and no cavitation appeared near the crack in the conduit. The results suggest that internal erosion can be suppressed when the water pressure acting intensively on the crack in the conduit is dispersed by the drainage layer. To validate these results, the pore water pressure, seepage line, and hydraulic gradient were investigated to confirm the erosion phenomenon and reinforcement effect.https://www.mdpi.com/2076-3417/12/2/567conduit crackembankment damhydraulic gradientinternal erosionpore water pressure |
| spellingShingle | Young-Hak Lee Jung-Hyun Ryu Joon Heo Jae-Woong Shim Dal-Won Lee Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks Applied Sciences conduit crack embankment dam hydraulic gradient internal erosion pore water pressure |
| title | Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks |
| title_full | Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks |
| title_fullStr | Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks |
| title_full_unstemmed | Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks |
| title_short | Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks |
| title_sort | stability improvement method for embankment dam with respect to conduit cracks |
| topic | conduit crack embankment dam hydraulic gradient internal erosion pore water pressure |
| url | https://www.mdpi.com/2076-3417/12/2/567 |
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