| HYDRAULIC ENGINEERING |
|
|
|
|
|
Centrifuge model test of geotextile-reinforced soil slopes during drawdown |
| ZHANG Ga, LUO Fangyue, LIU Yang, WANG Aixia |
| State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract Geotextiles are widely used to reinforce embankments and soil slopes. However, the geotextile reinforcement mechanism during drawdown is not well understood. Centrifuge model tests were conducted to observe the deformation and failure of geotextile-reinforced and unreinforced slopes during drawdown. The test shows that the geotextile significantly reduces the deformation and increases the slope stability. The slope deformation is restricted by the geotextile for water levels lower then a critical point and anchored by the geotextile at higher levels. The geotextile transmitted the interior restriction to the exterior of the slope via the soil-geotextile interaction. Thus, the deformation was more uniformly distributed. The geotextile delayed deformation localization, the precondition for slope failure.
|
| Keywords
soil slope
drawdown
geotextile
reinforcement
centrifuge model test
|
|
|
|
Issue Date: 15 July 2017
|
|
|
| [1] |
廖红建, 盛谦, 高石夯, 等. 库水位下降对滑坡体稳定性的影响 [J]. 岩石力学与工程学报, 2005, 24(19):3454-3458.LIAO Hongjian, SHENG Qian, GAO Shihang, et al. Influence of drawdown of reservoir water level on landslide stability [J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(19):3454-3458. (in Chinese)
|
| [2] |
Jian W X, Xu Q, Yang H F, et al. Mechanism and failure process of Qianjiangping landslide in the Three Gorges Reservoir, China [J]. Environmental Earth Sciences, 2014, 72(8): 2999-3013.
|
| [3] |
杨春宝, 朱斌, 孔令刚, 等. 水位变化诱发粉土边坡失稳离心模型试验 [J]. 岩土工程学报, 2013, 35(7): 1261-1271.YANG Chunbao, ZHU Bin, KONG Linggang, et al. Centrifugal model tests on failure of silty slopes induced by change of water level [J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1261-1271. (in Chinese)
|
| [4] |
Jia G W, Zhan T L T, Chen Y M, et al. Performance of a large-scale slope model subjected to rising and lowering water levels [J]. Engineering Geology, 2009, 106(1-2): 92-103.
|
| [5] |
唐晓松, 郑颖人, 唐辉明, 等. 水库滑坡变形特征和预测预报的数值研究 [J]. 岩土工程学报, 2013, 35(5): 940-947.TANG Xiaosong, ZHENG Yingren, TANG Huiming, et al. Numerical researches on deformation characteristics and prediction of reservoir landslides [J]. Chinese Journal of Geotechnical Engineering, 2013, 35(5): 940-947. (in Chinese)
|
| [6] |
Thusyanthan N I, Madabhushi S P G, Singh S. Tension in geomembranes on landfill slopes under static and earthquake loading-centrifuge study [J]. Geotextiles and Geomembranes, 2007, 25(2): 78-95.
|
| [7] |
Kelln C, Sharma J, Hughes D, et al. Deformation of a soft estuarine deposit under a geotextile reinforced embankment [J]. Canadian Geotechnical Journal, 2007, 44(5): 603-617.
|
| [8] |
Viswanadham B V S, Knig D. Centrifuge modeling of geotextile-reinforced slopes subjected to differential settlements [J]. Geotextiles and Geomembranes, 2009, 27(2): 77-88.
|
| [9] |
Zornberg J G, Sitar N, Mitchell J K. Performance of geosynthetic reinforced slopes at failure [J]. Journal Geotechnical and Geoenvironmental Engineering, 1998, 124(8): 670-683.
|
| [10] |
Wang L P, Zhang G, Zhang J M. Centrifuge model tests of geotextile-reinforced soil embankments during an earthquake [J]. Geotextiles and Geomembranes, 2011, 29(3): 222-232.
|
| [11] |
Luo F Y, Zhang G. Progressive failure behavior of cohesive soil slopes under water drawdown conditions [J]. Environmental Earth Sciences, 2016, 75(11): 973.
|
| [12] |
Zhang G, Hu Y, Zhang J M. New image analysis-based displacement-measurement system for geotechnical centrifuge modeling tests [J]. Measurement, 2009, 42(1): 87-96.
|
| [13] |
Zhang G, Wang L P. Integrated analysis of a coupled mechanism for the failure processes of pile-reinforced slopes [J]. Acta Geotechnica, 2016, 11(4): 941-952.
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2017,
Vol. 57
