Experimental evaluation of the performance of earth levees deteriorated by wildlife activities
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- 作者：Gholamreza Saghaee ; Ahmad A. Mousa ; Mohamed A. Meguid
- 关键词：Animal burrows ; Centrifuge models ; Internal erosion ; Levee ; Seepage
- 刊名：Acta Geotechnica
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：11
- 期：1
- 页码：83-93
- 全文大小：3,343 KB
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Ahmad A. Mousa (2)
Mohamed A. Meguid (1)
1. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal, QC, H3A 0C3, Canada
2. School of Engineering, Monash University, Selangor, Malaysia - 刊物类别：Engineering
- 刊物主题：Continuum Mechanics and Mechanics of Materials
Geotechnical Engineering
Soil Science and Conservation
Granular Media
Structural Mechanics - 出版者：Springer Berlin / Heidelberg
- ISSN：1861-1133
文摘
In this study, an earth levee model is constructed to investigate the impact of animal burrows on the integrity and performance of earthen structures. A series of centrifuge experiments are conducted on homogenous scaled-down 1H:1V levee models built from the natural Kasama soil. Both intact and deteriorated models were subject to a 35g acceleration level. Invasive animal intrusions were introduced in the form of horizontal array of idealized cylindrical burrows at the mid-height of the levee. The water level was gradually increased during the centrifuge flight, and the response of the levee was monitored throughout the test. Pore pressures were recorded using pressure transducers placed at preselected locations within the model. Surface displacements were measured using laser LVDTs and supplemented with three digital cameras for tracking the overall deformation pattern of the levee model. A summary of the test procedure and selected results is presented herewith. The observed deformation mechanism due to the presence of animal burrows is also described. As compared with the intact levee, the presence of burrows is found to alter the pattern of the water flow through the deteriorated levee structure—leading to a notable increase in the exit hydraulic gradient, internal erosion, and subsequently slope failure. Keywords Animal burrows Centrifuge models Internal erosion Levee Seepage