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降雨情况下排土场边坡稳定性数值模拟研究
Numerical Simulation on Dump Slope Stability under Rainfall Infiltration
排土场边坡不同于一般边坡,排土体为松散介质,降雨入渗对排土场边坡稳定性影响较大。为了定量研究降雨对排土场边坡的稳定性影响,以及防水和排水措施对边坡稳定性的影响,首先建立降雨情况下排土场渗流数值模型,分析排土场内部渗流场;然后对排土场边坡进行水土耦合分析,通过水土耦合分析发现降雨情况下边坡稳定性安全系数大大降低。为了服务于工程和科学研究,进一步对防渗和排水情况下排土场边坡稳定性进行定量研究。研究发现:在排土场台阶底部设置排水管道或者在排土场顶部设置防水层可以大大提高降雨情况下边坡稳定性。研究结果可为正确评价和治理该类边坡的稳定性提供科学依据。
Unlike ordinary slope, dump slope is made of loose media and its stability is greatly affected by rainfall infiltration. In order to quantitatively study the impact of rainfall as well as waterproofing and drainage measures on the stability of dump slope, firstly, we built a numerical model of dump slope seepage under rainfall infiltration to analyze the internal seepage field; and then through soil and water coupling analysis we found that the safety factor of dump slope decreased remarkably in rainfall condition. In order to serve the engineering and scientific research, we further studied the stability of dump slope under seepage-proofing or drainage conditions. Results suggest that drainage pipes in the bottom of the slope terrace or seepage-proofing layer on top of the slope could greatly improve the slope stability under rainfall infiltration. The research result provides basis for the design and regulation of dump slope.
排土场 / 数值模拟 / 渗流场 / 降雨强度 / 边坡稳定性
dump slope / numerical simulation / seepage field / rainfall intensity / slope stability
[1] 毛昶熙,陈 平,李祖贻.关于渗流作用下坝坡稳定有限单元法分析一文的终结讨论. 岩土工程学报,1984,6(5):96-100. (MAO Chang-xi, CHEN Ping, LI Zu-yi. Final Discussion on the Finite Element Method for Dam and Slope Stability Analysis under the Condition of Seepage. Chinese Journal of Geotechnical Engineering, 1984,6(5):96-100.(in Chinese))
[2]
WANG G, SASSA K. Factors Affecting Rainfall Induced Flow Slides in Laboratory Flume Tests . Geotechnique, 2001,51 (7) :587-599.
[3]
OCHIAI H,OKADA Y,FURUYA GEN,et al.A Fluidized Landslide on a Natural Slope by Artificial Rainfall. Landslides, 2004,(1) :211-219.
[4]
CHO S E,LEE S R.Instability of Unsaturated Soil Slopes Due to Infiltration. Computers and Geotechnics, 2001,28(3): 185-208.
[5]
陈守义.考虑入渗和蒸发影响的土坡稳定性分析方法. 岩土力学,1997,18(2):8-12. (CHEN Shou-yi. A Method of Stability Analysis Taken Effects of Infiltration and Evaporation into Consideration for Soil Slopes. Rock and Soil Mechanics, 1997,18(2):8-12. (in Chinese))
[6]
杨育文,周志立,蒋 涛,等.渗流作用下边坡自稳临界高度计算.长江科学院院报,2013,30(10):54-57. (YANG Yu-wen, ZHOU Zhi-li, JIANG Tao,et al. Determining the Self-stability Critical Height of Slope with Steady Seepage. Journal of Yangtze River Scientific Research Institute, 2013, 30(10):54-57. (in Chinese))
[7]
吴宏伟,陈守义. 雨水入渗对非饱和土坡稳定性影响的参数研究. 岩土力学,1999,20(1):1-14. (WU Hong-wei, CHEN Shou-yi. Parametric Study of Effects of Rain Infiltration on Unsaturated Slopes. Rock and Soil Mechanics, 1999, 20(1): 1-14. (in Chinese))
[8]
张延军,王恩志,王思敬. 非饱和土中的流－固耦合研究. 岩土力学,2004,25(6):999-1004.(ZHANG Yan-jun,WANG En-zhi,WANG Si-jing.Study for Fluid-Solid Coupling Process in Unsaturated Soil. Rock and Soil Mechanics, 2004, 25(6): 999-1004. (in Chinese))
[9]
徐 晗,饶锡保,汪明元.降雨条件下膨胀岩边坡失稳数值模拟研究.长江科学院院报, 2009,26(11):52-57. (XU Han, RAO Xi-bao, WANG Ming-yuan. Numerical Simulation on Failure Mechanism of Expansive Rock Slope under Rainfall. Journal of Yangtze River Scientific Research Institute, 2009, 26(11): 52-57. (in Chinese))
[10]
荣 冠, 周创兵, 江进辉,等.锦屏一级水电站左岸边坡渗流计算及稳定性分析.长江科学院院报,2005,22(6):49-53. (RONG Guan, ZHOU Chuang-bin, JIANG Jin-hui, et al. Seepage Calculation and Stability Analysis on Left Slope of Jinping-I Hydropower Station. Journal of Yangtze River Scientific Research Institute, 2005, 22(6): 49-53. (in Chinese))
[11]
王叶娇,曹 玲,徐永福.降雨入渗下非饱和土边坡临界稳定性分析.长江科学院院报,2013,30(9):75-79. (WANG Ye-jiao, CAO Ling, XU Yong-fu. Critical Stability of Unsaturated Soil Slope Under Rainfall Infiltration. Journal of Yangtze River Scientific Research Institute, 2013, 30(9):75-79. (in Chinese))
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