Laboratory piping tests on fine gravel
| Autor: | Daniel Leavell, Axel M. Montalvo-Bartolomei, Bryant A. Robbins, Isaac J. Stephens, Jamie F. López-Soto |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Piping 0208 environmental biotechnology 0211 other engineering and technologies 02 engineering and technology Geotechnical Engineering and Engineering Geology 020801 environmental engineering Flume Erosion Internal erosion Geotechnical engineering Levee Geology 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Canadian Geotechnical Journal. 55:1552-1563 |
| ISSN: | 1208-6010 0008-3674 |
| Popis: | Results of an experimental study are presented in which the horizontal, critical gradient required for backward erosion piping of fine gravel was measured. A horizontal flume was constructed that allowed samples to be subjected to a vertical confining stress and unidirectional flow. The seepage gradient was increased gradually during each test, while the sample was monitored with an array of pore pressure transducers as well as visually through a clear acrylic top. The maximum, global gradient required during each test for piping to initiate and progress through the sample was recorded as the critical gradient. Sixteen tests were conducted. Values of the critical gradient were found to vary from a minimum of 0.30 in a loose state to a maximum of 0.51 in a dense state. Results of the experiments were compared with the predictive methods of Sellmeijer (original), Sellmeijer et al. (with multivariate adjustment), Schmertmann, Hoffmans, Lane, and Bligh. Only the method proposed by Schmertmann compared favorably with the experimental results. |
| Databáze: | OpenAIRE |
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