An experimental study on embankment failure induced by prolonged immersion in floodwater
| Autor: | Cheng Zhang, Jin-chang Sheng, Mei-li Zhan, Luo Yulong, Min Nie |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
geography
lcsh:TC401-506 geography.geographical_feature_category 0208 environmental biotechnology Floodwater Foundation (engineering) Ocean Engineering lcsh:River lake and water-supply engineering (General) Heave phenomenon 02 engineering and technology Embankment 020801 environmental engineering Water level Seepage failure Shear strength (soil) Rapid rise Loam Immersion (virtual reality) Geotechnical engineering Levee Prolonged immersion Phreatic Geology Civil and Structural Engineering |
| Zdroj: | Water Science and Engineering, Vol 9, Iss 1, Pp 81-86 (2016) |
| ISSN: | 1674-2370 |
| DOI: | 10.1016/j.wse.2015.11.001 |
| Popis: | Prolonged immersion in floodwater is one of the main causes of embankment failure or dam breaks, although failure mechanisms have not been extensively studied. In this study, an embankment model was constructed to investigate the influence of prolonged immersion in floodwater on the failure of an embankment. The results indicate that: (1) the phreatic surface gradually rises and negative pore pressures gradually dissipate with the time of prolonged immersion in floodwater, and, finally, a stable and fully saturated state is reached; (2) observable cracks and a heave phenomenon are found near the downstream toe and in the top stratum of the foundation, which are attributed to the large uplift pressure on the interface between the top stratum and the pervious substratum, the tremendous impact effect induced by the rapid rise in water level, and the reduction of shear strength of heavy silt loam. The present study enhances our in-depth knowledge of the mechanisms of embankment failure induced by floodwater, and provides experimental data for validation of mathematical models of the embankment seepage failure. |
| Databáze: | OpenAIRE |
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