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水库滑坡灾害是大型水库运行调度工作中备受关注的问题。为了科学指导汛期水库运行调度中的滑坡灾害风险防控,基于库水动力作用效应及类型分析,通过大型离心模型试验和数值模拟研究了库水下降诱发滑坡变形破坏机理,重点分析了库水持续性下降、不同间歇期下降、相同间歇期多阶段下降三种消落方式下的滑坡稳定性响应规律。研究表明:在库水下降末期,随着坡面静水压力的快速消落,滑体内地下水位严重滞后于库水位变动,易产生高的动水压力、导致滑坡变形破坏。在库水位持续下降过程中,库水下降速率越大,地下水头差和水力梯度越大,则稳定性会持续下降。不同间歇期下降相比持续性下降,地下水力梯度比降低,可缓解库水位持续快速下降导致的地下水滞后及动水压力影响,稳定性下降速率会减缓。而相同间歇期多阶段下降则可进一步减小影响,稳定性降幅明显减小。
Abstract：Reservoir landslide disaster is a problem of great concern in the operation of large reservoirs. In this paper, in order to guide the operation of reservoir in flood season and control the risk of reservoir landslide, the research on the deformation and stability response of hydrodynamic landslide under different reservoir water fluctuation modes is carried out. Base on analysis on the effect and type of reservoir hydrodynamic action, through numerical simulation and large-scale centrifugal model test, the stability response law and deformation mechanism of landslide induced by reservoir water falling is revealed. The stability response law of landslide under three kinds of fluctuation modes, namely, the continuous decline of reservoir water, the decline of different intermittent periods and the multi-stage decline of the same intermittent period, are analyzed. The results are as follows: At the end of reservoir water decline, with the rapid decline of slope hydrostatic pressure, the groundwater level in the landslide body seriously lags behind the reservoir water level change, which easily leads to high hydrodynamic pressure and landslide deformation and damage. In the process of continuous decline of water level, the greater the decline rate of reservoir water, the greater the head difference, and the greater the underground hydraulic gradient, the stability will continue to decline. Compared with the continuous decline in different intermittent periods, the groundwater gradient ratio decreases, which can alleviate the influence of groundwater lag and hydrodynamic pressure caused by the continuous and rapid decline of reservoir water level, and the stability decline rate will slow down. However, the multi-stage decline in the same intermission period can further reduce the impact, and the decrease range of stability is significantly reduced.
[1] GU D M,HUANG D,YANG W D,et al.Understanding the triggering mechanism and possible kinematic evolution of a reactivated landslide in the Three Gorges Reservoir[J].Landslides,2017,14(6):2073- 2087.
[2] PARONUZZI P,RIGO E,BOLLA A.Influence of filling-drawdown cycles of the Vajont Reservoir on Mt.Toc slope stability[J].Geomorphology,2013,191:75- 93.
[3] 邓华锋,李建林.库水位变化对库岸边坡变形稳定的影响机理研究[J].水利学报,2014,45(S2):45- 51.DENG Huafeng,LI Jianlin.Research on the influence mechanism of water level fluctuation on the bank landslide deformation and stability[J].Journal of Hydraulic Engineering,2014,45(S2):45- 51.
[4] TANG Minggao,XU Qiang,YANG He,et al.Activity law and hydraulics mechanism of landslides with different sliding surface and permeability in the Three Gorges Reservoir Area,China[J].Engineering Geology,2019,260:105212.
[5] 钱灵杰.三峡水库滑坡变形响应规律及机理研究[D].成都:成都理工大学,2016.QIAN Lingjie.Study on deformation response law and mechanism of Three Gorges Reservoir landslide[D].Chengdu:Chengdu University of Technology,2016.
[6] 缪海波.三峡库区侏罗系红层滑坡变形破坏机理与预测预报研究[D].北京:中国地质大学,2012.MIAO Haibo.Study on deformation failure mechanism and prediction of Jurassic red bed landslide in Three Gorges Reservoir Area[D].Beijing:China University of Geosciences,2012.
[7] 赵瑞欣.三峡工程库水变动下堆积层滑坡成灾风险研究[D].北京:中国地质大学,2016.ZHAO Ruixin.Study on hazard risk of accumulation landslide under reservoir water fluctuation in Three Gorges Project[D].Beijing:China University of Geosciences,2016.
[8] 张龙飞,杨宏伟,李曜男,等.库水与降雨对凉水井滑坡变形及稳定性的影响[J].水利水运工程学报,2019(2):16- 24.ZHANG Longfei,YANG Hongwei,LI Yaonan,et al.Influence of reservoir water and rainfall on the Liangshuijing landslide deformation and stability[J].Hydro-Science and Engineering,2019(2):16- 24.
[9] 向玲,王世梅,王力.动水压力型滑坡对库水位升降作用的响应:以三峡库区树坪滑坡为例[J].工程地质学报,2014,22(5):876- 882.XIANG Ling,WANG Shimei,WANG Li.Response of typical hydrodynamic pressure landslide to reservoir water level fluctuation:Shuping landslide in Three Gorges Reservoir as an example[J].Journal of Engineering Geology,2014,22(5):876- 882.
[10] 甘恩来,李芝军,彭斌,等.三峡库水位升降对动水压力型滑坡稳定性的影响分析:以上安坪滑坡为例[J].中国水运(下半月),2016,16(3):157- 158.GAN Enlai,LI Zhijun,PENG Bin,et al.Influence of water level rise and fall of Three Gorges Reservoir on stability of hydrodynamic pressure landslide - Shanganping landslide as an example[J].China Water Transport,2016,16(3):157- 158.
[11] 杨背背,殷坤龙,黄发明,等.库水位升降联合降雨作用下白家包滑坡稳定性评价[J].中国水利水电科学研究院学报,2016,14(6):460- 467.YANG Beibei,YIN Kunlong,HUANG Faming,et al.Stability analysis of Baijiabao landslide under reservoir water level fluctuation and rainfall[J].Journal of China Institute of Water Resources and Hydropower Research,2016,14(6):460- 467.
[12] YI W,MENG Z P,LI G Q,et al.Analysis of dynamic response of landslide stability to reservoir water level fluctuation using numerical simulation[J].Advanced Materials Research,2012,2091(594):407- 414.
[13] MAIHEMUTI B,WANG E,HUDAN T,et al.Numerical simulation analysis of reservoir bank fractured rock-slope deformation and failure processes[J].International Journal of Geomechanics,2016,16(2):04015058.
[14] 张国栋,李泯蒂,龙海涛,等.水库型滑坡稳定性动态变化过程有限元分析[J].水利水电技术,2016,47(2):108- 113.ZHANG Guodong,LI Mindi,LONG Haitao,et al.Finite element analysis on dynamic changing process of stability of reservoir-induced landslide[J].Water Resources and Hydropower Engineering,2016,47(2):108- 113.
[15] 廖彬,张文斌.库水位变化条件下滑坡稳定性研究:以雅砻江某水电站虎山滩滑坡为例[J].人民长江,2013,44(9):37- 40.LIAO Bin,ZHANG Wenbin.Research on landslide stability under water level fluctuation of reservoir:case of Hushantan landslide of a hydropower station on Yalong River[J].Yangtze River,2013,44(9):37- 40.
[16] 倪卫达,刘晓,夏浩.基于水致弱化效应的库岸边坡动态稳定研究[J].人民长江,2013,44(23):55- 59.NI Weida,LIU Xiao,XIA Hao.Research on dynamic stability of reservoir slope based on water weakening effect[J].Yangtze River,2013,44(23):55- 59.
[17] 张夏冉,殷坤龙,夏辉,等.渗透系数与库水位升降对下坪滑坡稳定性的影响研究[J].工程地质学报,2017,25(2):488- 495.ZHANG Xiaran,YIN Kunlong,XIA Hui,et al.Influence of permeability coefficient and reservoir water level fluctuation on xiaping landslide stability[J].Journal of Engineering Geology,2017,25(2):488- 495.
[18] 李鹏岳,巴仁基,倪化勇,等.库水位升降速率对雅安双家坪堆积体滑坡稳定性影响模拟分析[J].地质力学学报,2017,23(2):288- 295.LI Pengyue,BA Renji,NI Huayong,et al.Simulation analysis of the influence of the reservoir water level fluctuation rate on the stability of Shuangjiaping accumulation landslide in Ya′an[J].Journal of Geomechanics,2017,23(2):288- 295.
[19] 聂兵其,汤明高,邵山,等.基于灰色关联法的涉水边坡稳定性影响因素敏感性分析[J].长江科学院院报,2019,36(1):123- 126.NIE Bingqi,TANG Minggao,SHAO shan,et al.Sensibility analysis of influencing factors of reservoir slope stability based on grey correlation[J].Journal of Yangtze River Scientific Research Institute,2019,36(1):123- 126.
[20] 喻甜香,邓丽妹,张珂峰.降雨-库水位作用下的下坪滑坡Monte-Carlo可靠度研究[J].水利水电技术,2019,50(11):118- 123.YU Tianxiang,DENG Limei,ZHANG Kefeng.Study on Monte-Carlo reliability degree of Xiaping landslide under joint-effect of rainfall-reservoir water level[J].Water Resources and Hydropower Engineering,2019,50(11):118- 123.
[21] 王科,王常明,王彬,等.基于Morgenstern-Price法和强度折减法的边坡稳定性对比分析[J].吉林大学学报(地球科学版),2013,43(3):902- 907.WANG Ke,WANG Changming,WANG Bin,et al.Comparative analysis on slope stability based on Morgenstern-Price method and strength reduction method[J].Journal of Jilin University(Earth Science Edition),2013,43(3):902- 907.
基本信息:
DOI：10.13928/j.cnki.wrahe.2021.01.021
中图分类号:P642.22
引用信息:
[1]付小林,汤明高,叶润青,等.不同库水消落方式下动水压力型滑坡变形与稳定性响应研究[J],2021,52(01):201-211.DOI:10.13928/j.cnki.wrahe.2021.01.021.
基金信息:
国家自然科学基金项目(41977255);; 地质调查项目子题(武地科合[2019]037);; 四川省科技计划项目(2019YJ0403)