Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam
This paper focuses on the impact of geotextile tube damage at the joints between tubes on dam structures subjected to seepage. First, a seepage-induced failure critical gradient model for damaged geotextile tubes was developed. Tests were conducted using geotextile specimens with precut O-shaped hol...
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/23/3934 |
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| author | Wenlong Mao Tianwen Wang Yiming Shu |
| author_facet | Wenlong Mao Tianwen Wang Yiming Shu |
| author_sort | Wenlong Mao |
| collection | DOAJ |
| description | This paper focuses on the impact of geotextile tube damage at the joints between tubes on dam structures subjected to seepage. First, a seepage-induced failure critical gradient model for damaged geotextile tubes was developed. Tests were conducted using geotextile specimens with precut O-shaped holes to simulate the seepage erosion process. Various overburden loads (0, 5, 10, 20, and 30 kPa) and hole radii (0.5, 1.0, 1.5, and 2 cm) were examined. Based on the test phenomena and the changes in pore-water pressure and seepage flow, four progression stages (seepage stability, sand particle wash-out, preferential flow formation and development, and complete failure) were identified. The experimental critical gradients obtained under different conditions agreed well with the model results. The critical gradient is positively correlated with the overburden load and negatively correlated with the hole radius. Critical gradient growth gradually slows with increasing overburden load. The critical gradient difference caused by the hole size decreases rapidly. When the overburden load increases to 20 kPa, this difference is essentially unchanged. These findings can provide a better understanding of the performance of damaged geotextile tubes. |
| first_indexed | 2024-03-09T17:28:21Z |
| format | Article |
| id | doaj.art-d30f2a07c975413eb78844dcf17ddd5c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T17:28:21Z |
| publishDate | 2022-12-01 |
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| spelling | doaj.art-d30f2a07c975413eb78844dcf17ddd5c2023-11-24T12:33:42ZengMDPI AGWater2073-44412022-12-011423393410.3390/w14233934Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube DamWenlong Mao0Tianwen Wang1Yiming Shu2School of Naval Architecture & Ocean Engineering, Jiangsu Maritime Institute, Ge-Zhi Road 309#, Nanjing 211170, ChinaSchool of Naval Architecture & Ocean Engineering, Jiangsu Maritime Institute, Ge-Zhi Road 309#, Nanjing 211170, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Xi-Kang Road 1#, Nanjing 210098, ChinaThis paper focuses on the impact of geotextile tube damage at the joints between tubes on dam structures subjected to seepage. First, a seepage-induced failure critical gradient model for damaged geotextile tubes was developed. Tests were conducted using geotextile specimens with precut O-shaped holes to simulate the seepage erosion process. Various overburden loads (0, 5, 10, 20, and 30 kPa) and hole radii (0.5, 1.0, 1.5, and 2 cm) were examined. Based on the test phenomena and the changes in pore-water pressure and seepage flow, four progression stages (seepage stability, sand particle wash-out, preferential flow formation and development, and complete failure) were identified. The experimental critical gradients obtained under different conditions agreed well with the model results. The critical gradient is positively correlated with the overburden load and negatively correlated with the hole radius. Critical gradient growth gradually slows with increasing overburden load. The critical gradient difference caused by the hole size decreases rapidly. When the overburden load increases to 20 kPa, this difference is essentially unchanged. These findings can provide a better understanding of the performance of damaged geotextile tubes.https://www.mdpi.com/2073-4441/14/23/3934geosyntheticsseepage failurecritical gradientdamaged jointgeotextile tube dams |
| spellingShingle | Wenlong Mao Tianwen Wang Yiming Shu Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam Water geosynthetics seepage failure critical gradient damaged joint geotextile tube dams |
| title | Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam |
| title_full | Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam |
| title_fullStr | Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam |
| title_full_unstemmed | Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam |
| title_short | Model and Experimental Studies of the Seepage Failure of Damaged Geotextile at the Joint between Tubes in a Geotextile Tube Dam |
| title_sort | model and experimental studies of the seepage failure of damaged geotextile at the joint between tubes in a geotextile tube dam |
| topic | geosynthetics seepage failure critical gradient damaged joint geotextile tube dams |
| url | https://www.mdpi.com/2073-4441/14/23/3934 |
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