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-  2019 

库区水位下降对库岸边坡稳定性的影响 Influences of reservoirs water level drawdown on slope stability

Keywords: 库水位下降,数值计算,边坡,稳定性分析,稳定系数

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Abstract:

为了研究库区水位下降过程中岸坡的稳定性,在探讨库岸边坡稳定性影响因素的基础之上,通过数值计算与稳定性分析理论,同时考虑坡度、坡体渗透系数与库区水位下降速率的不同工况条件下渗流场中孔隙水压力的变化,并对库区水位下降期间各因素变化对边坡稳定性系数的影响进行了分析.研究结果表明:库区水位下降对库岸边坡的稳定性有着较大影响,是库区边坡失稳破坏的重要因素,当水位下降时,库岸边坡稳定逐渐降低.采用FLAC对不同工况进行数值计算,当研究参数取值在符合工程实际范围内时,相同水位下降速率条件下库岸边坡坡度逐渐增加时,边坡稳定性呈现逐渐下降趋势;坡体渗透系数逐渐减小时,边坡稳定性也越来越低.而不同的水位下降速率对边坡稳定影响也不同,当水位下降高度相同时,下降速率逐渐增大则边坡的稳定性逐渐降低;坡度、水位下降速率与坡体渗透系数的变化都会导致边坡稳定系数的变化,其中库区水位下降过程中存在着稳定性系数最小值,水位下降速度越大,最小值越小;此外,库水位下降时存在一个最危险水位,此时坡体稳定性系数最小,而该水位大致位于坡体下1/3处.研究结果对三峡库区水库水位的调控和库岸边坡的稳定性具有一定的工程意义

References

[1]  苏爱军.湖北省三峡库区滑坡防治地质勘察与治理工程技术规定[M].北京:中国地质出版社,2003.Su Aijun.Technical Regulation of Geological Survey and Treatment of Landslide in the Three Gorges Reservoir Area of Hubei Province[M].Beijing:China Geological Publishing House,2003.
[2]  朱冬林,任光明,聂德新,等.库水位变化下对水库滑坡稳定性影响的预测[J].水文地质与工程地质,2002,(3):6-9.Zhu Donglin,Ren Guangming,Nie Dexin,et al.Effecting and forecasting of landslide stability with the change of reservoir water level[J].Hydrogeology&Engineering Geology,2002,(3):6-9.
[3]  中村浩之.论水库滑坡[J].水土保持通报,1990,10(1):53-64.Nakamura.Study on landslide in reservoir area[J].Bulletin of Soil and Water Conservation,1990,10(1):53-64.
[4]  郑颖人,时卫民,孔位学.库水位下降时渗透力及地下水浸润线的计算[J].岩石力学与工程学报,2004,23(18):3203-3210.Zheng Yingren,Shi Weimin,Kong Weixue,et al.Calculation of seepage forces and phreatic surface under drawdown conditions[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(18):3203-3210.
[5]  郑颖人,唐晓松.库水位作用下边(滑)坡稳定性分析[J].岩土工程学报,2007,29(8):1115-1121.Zheng Yingren,Tang Xiaosong.Stability analysis of slopes under drawdown condition of reservoirs[J].Chinese Journal of Geotechnical Engineering,2007,29(8):1115-1121.
[6]  张文杰,詹良通,凌道盛,等.水位升降对库区非饱和土质岸坡稳定性的影响[J].浙江大学学报(工学版),2006,40(8):1365-1370.Zhang Wenjie,Zhan Liangtong,Ling Daosheng,et al.Influence of reservoir water level fluctuations on stability of unsaturated soil banks[J].Journal of Zhejiang University(Engineering Science),2006,40(8):1365-1370.
[7]  梁学战,赵先涛,向杰,等.库水位升降作用下土质岸坡变形特征实验研究[J].土木建筑与环境工程,2014,36(1):92-100.Liang Xuezhan,Zhao Xiantao,Xiang Jie,et al.Experimental analysis of deformation characteristic for soil bank slope under reservoir water level fluctuation[J].Journal of Civil,Architectural&Environmental Engineering,2014,36(1):92-100.
[8]  王孔伟,张帆,林东成.三峡地区新构造活动与滑坡分布关系[J].世界地质,2007,26(1):26-32.Wang Kongwei,Zhang Fan,Lin Dongcheng.Relation between neotectonism and landslides in the Three Gorges reservoir area[J].World Geology,2007,26(1):26-32.
[9]  丁秀丽,付敬,张奇华.三峡水库水位涨落条件下奉节南桥头滑坡稳定性分析[J].岩石力学与工程学报,2004,23(17):2913-2919.Ding Xiuli,Fu Jing,Zhang Qihua.Stability analysis of llandslide in the South End of Fengjie Highway Bridge with fluctuation of water level of Three Gorges Reservoir[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(17):2913-2919.
[10]  郑颖人,赵尚毅,张俊,等.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.Zheng Yingren,Zhao Shangyi,Zhang Jun,et al.Application of strength reduction FEM in soil and rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
[11]  雷迪.库岸边坡稳定性影响因素敏感性分析[J].人民长江,2014,45(2):95-97.Lei Di.Sensitivity analysis of influence factors of bank slope stability[J].Yangtze River,2014,45(2):95-97.
[12]  刘新喜.库水位下降对滑坡稳定性的影响及工程应用研究[D].北京:中国地质大学,2003.Liu Xinxi.Research on landslide stability in drawdown of reservoir water level and its application[D].Beijing:China University of Geosciences,2003.
[13]  张亮亮.考虑降雨入渗影响的公路边坡稳定性数值实验研究[D].武汉:武汉理工大学,2006.Zhang Liangliang.Numerical experimentation on highway slope stability considering the effect of rainfall infiltration[D].Wuhan:Wuhan University of Technology,2006.
[14]  彭良泉,齐美苗,胡静.从一工程实例浅析水库水位变化对库岸的影响[J].岩石力学与工程学报,2001,20(1):922-926.Peng Liangquan,Qi Meimiao,Hu Jing.Influence of reservoir water level change on the bank from an engineering example[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(1):922-926.
[15]  王乾程,李培铮,谢建华,等.水作用下土坡稳定性分析及防治对策探讨[J].西部采矿工程,2003,84:156-157.Wang Qiancheng,Li Peizheng,Xie Jianhua,et al.Soil slope stability and control measures under water effects[J].West China Exploration Engineering,2003,84:156-157.
[16]  莫伟伟,徐平,丁秀丽.库水位涨落对滑坡稳定性影响研究进展[J].地下空间与工程学报,2006,2(6):997-1002.Mo Weiwei,Xu Ping,Ding Xiuli.Research advances on the influences of reservoir water level fluctuation on slope stability[J].Chinese Journal of Underground Space and Engineering,2006,2(6):997-1002.

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