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| Evaluation of regional landslide stability considering rainfall and variation of water level of reservoir |
| LIU Lei1，YIN Kunlong2，XU Yong1，LIAN Zhipeng1，WANG Ningtao1 |
| (1. Wuhan Center，China Geological Survey，Wuhan，Hubei 430205，China；2. Faculty of Engineering，China University of Geosciences，Wuhan，Hubei 430074，China) |
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Abstract The cyclical fluctuations of water level in the reservoir area combined with the rainfall increase the probability of reactivation or even instability of existing and potential landslides on both banks of the reservoir area，which threatens the safety of life and property of the residents in the reservoir area. The method of calculating the regional landslide stability considering the characteristics of rainfall and water level fluctuation was thus introduced. The unsteady equation of motion of phreatic water with inclined impervious bed was solved with Boussinesq method to derive the approximate analytical solution of groundwater level in bank slope when the reservoir water level drops uniformly. The transient rainfall infiltration model and the three-dimensional slope stability calculation model were adopted to calculate the regional landslide stability according to the different rainfall duration and intensity. Wanzhou bank of the Three Gorges Reservoir area was presented as an example with the data and parameter acquisition method in stability evaluation introduced in detail. Three different conditions were compared and calculated. The results show that the predicted results in simulation considering the different reservoir water levels and rainfalls reflect the spatial distribution characteristics of slope stability in the study area to some extent. The stability of the reservoir banks in the study area is more responsive to the rainfall than to the changes of water level of reservoir.
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[1] 唐 川. 云南滑坡泥石流研究[M]. 北京：商务印书馆，2003：137–140.(TANG Chuan. Yunnan landslide debris flow research[M]. Beijing：Commercial Press，2003：137–140.(in Chinese))
[2] 张 明，胡瑞林，崔芳鹏，等 .考虑水岩物理化学作用的库岸堆积体边坡稳定性研究[J]. 岩石力学与工程学报，2008，27(增2)：3 699–3 704.(ZHANG Ming，HU Ruilin，CUI Fangpeng，et al. Study on slope stability of reservoir bank accumulation considering physical and chemical effects of water rock[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 699–3 704.(in Chinese))
[3] 金德镰，王耕夫. 拓溪水库塘岩光滑坡[M]. 北京：科学出版社，1988：301–307.(JIN delian，WANG genfu. Tang Yanguang landslide of Tuo Xi reservoir[M]. Beijing：Science Press，1988：301–307.(in Chinese))
[4] 李庆普. 黄龙滩水电站的水库滑坡[J]. 水力发电，1989，(l)：35–39.(LI Qingpu. Reservoir landslide of Huang long-tan Hydropower Station[J]. Hydroelectric Power Generation，1989，(l)：35–39.(in Chinese))
[5] 王连新，马建宏，边智华，等. 水库滑坡与防治技术[M]. 武汉：长江出版社，2005：1–5.(WANG lianxin，MA Jianhong，BIAN Zhihua，et al. Reservoir landslide and its prevention and control technology[M]. Wuhan：Chang Jiang Press，2005：1–5.(in Chinese))
[6] JAEGER C. The Vajont rock slide[J]. Water Power，1965，17(3)：110–111.
[7] RIEMER W. Landslides and reservoirs(keynote paper)[C]// Proceedings of the 6th International Symposium on Landslides. Rotterdam：A.A. Balkema Publishers，1992：1 373–2 004.
[8] FJITA H.. Influence of water level fluctuations in a reservoir on slope stability[J]. Bulletin of the Interactional Association of Engineering Geology，1977，16(1)：170–173.
[9] 肖诗荣，刘德富，姜福兴，等. 三峡库区千将坪滑坡地质力学模型试验研究[J]. 岩石力学与工程学报，2010，29(5)：1 023–1 030. (XIAO Shirong，LIU Defu，JIANG Fuxing，et al. Experimental study on geomechanical model of landslide in the Three Gorges Reservoir Area[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：1 023–1 030.(in Chinese))
[10] JIANG J W，EHRET D，XIANG W，et al. Numerical simulation of Qiaotou Landslide deformation caused by drawdown of the Three Gorges Reservoir，China[J]. Environmental Earth Sciences，2011，62(2)：411–419.
[11] BERILGEN M M. Investigation of stability of slopes under drawdown conditions[J]. Computers and Geotechincs，2007，34(2)：81–91.
[12] TAYLOR D W. Fundamentals of soil mechanics[J]. Soil Science，1948，66(2)：161.
[13] XIE M W，ESAKI T，QUI C，et al. Geographical information system-based computational implementation and application of spatial three-dimensional slope stability analysis[J]. Computers and Geotechnics，2006，33：260–274.
[14] MONTGOMERY D R，DIETRICH W E. A physically based model for the topographic control on shallow landsliding[J]. Water Resources Research，1994，30(4)：1 153–1 171.
[15] PACK R T，TARBOTON D G，GOODWIN C N. The SINMAP approach to terrain stability mapping[C]// The 8th Congress of the International Association of Engineering Geology. Vancouver：[s. n.]， 1998：21–28.
[16] GODT J W，BAUM R L，SAVAGE W Z，et al. Transient deterministic shallow landslide modeling：Requirements for susceptibility and hazard assessments in a GIS framework[J]. Engineering Geology，2008，102(3–4)：214–226.
[17] BAUM R L，GODT J W，SAVAGE W Z. Estimating the timing and location of shallow rainfall-induced landslides using a model for transient，unsaturated infiltration[J]. Journal of Geophysical Research，2010，15：F03013.
[18] REID M E，CHRISTIAN S B，BRIEN D L，et al. Scoops 3D—Software to analyze 3D slope stability throughout a digital landscape [M]. Virginia：USGS，2015：218.
[19] 刘 磊. 三峡水库万州区库岸滑坡灾害风险评价研究[博士学位论文][D]. 武汉：中国地质大学(武汉)，2016.(LIU Lei. Study on reservoir landslide hazard assessment in Wanzhou reservoir of Three Gorges Reservoir[Ph. D Thesis][D]. Wuhan：China University of Geosciences(Wuhan)，2016.(in Chinese))
[20] 刘 磊，殷坤龙，王佳佳，等. 降雨影响下的区域滑坡危险性动态评价研究——以三峡库区万州主城区为例[J]. 岩石力学与工程学报，2016，35(3)：558–569.(LIU Lei，YIN Kunlong，WANG Jiajia，et al. Study on dynamic evaluation of regional landslide hazard under the influence of rainfall-taking Wanzhou city as an example in Three Gorges Reservoir area[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(3)：558–569.(in Chinese))
[21] SAVAGE W Z，GODT J W，BAUM R L. A model for spatially and temporally distributed shallow landslide initiation by rainfall infiltration[C]// Debris-Flow Hazards Mitigation：Mechanics，Prediction and Assessment. Rotterdam：[s. n.]，2003：179–187.
[22] 薛禹群. 地下水动力学原理[M]. 北京：地质出版社，1986：46–49.(XUE Yuqun. Groundwater dynamics principle[M]. Beijing：Geology Press，1986：46–49.(in Chinese))
[23] 陈崇希，林 敏. 地下水动力学[M]. 5版. 北京：地质出版社，2011：100–110.(CHEN Chongxi，LIN Min. Groundwater dynamics[M]. 5th ed. Beijing：Geological Publishing House，2011：100–110.(in Chinese))
[24] 刘 磊，殷坤龙，张 俊. 三峡库区万州主城区第四系堆积层厚度的估算方法及应用[J]. 地质科技情报，2016，33(1)：177–183.(LIU Lei，YIN Kunlong，ZHANG Jun. Estimation method and application of the thickness of the Quaternary accumulation layer in the main urban area of Wanzhou in the Three Gorges Reservoir Area[J]. Geological Science and Technology Information，2016，33(1)：177–183.(in Chinese))
[25] 中华人民共和国行业标准编写组. DB50/143—2003地质灾害防治工程勘察规范[S]. 重庆：重庆市质量技术监督局，2003.(The Professional Standards Compilation Group of People?s Republic of China. DB50/143—2003 geological hazard prevention engineering investigation standard[S]. Chongqing：Chongqing Municipal Bureau of Quality and Technical Supervision，2003.(in Chinese))
[26] 中华人民共和国行业标准编写组. DZT 0219—2006滑坡防治工程设计与施工技术规范[S]. 北京：中华人民共和国国土资源部，2006.(The Professional Standards Compilation Group of People?s Republic of China. Technical specification for design and construction of DZT 0219—2006 landslide control engineering[S]. Beijing：People?s Republic of China Ministry of Land and Resources，2006.(in Chinese)) |
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2018, Vol. 37 
