卡拉水电站上田滑坡体稳定性分析及评价研究
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摘要
为了分析卡拉水电站工程区某滑坡体的稳定性,通过对其滑坡成因、地形地貌、地质构造、岩土力学参数敏感性等内在因素分析可知,滑坡体随着坡面隆起和坡内扩容加剧,在外界作用下易导致边坡失稳破坏;其层面与节理裂隙的不良组合为边坡变形失稳提供了边界,陡倾坡内的裂隙,为地下水的入渗创造了条件;滑坡稳定性随着岩土力学强度参数的提高而增强。通过对降雨、水位升降和地震等外在因素的敏感性分析可知,库水位骤升骤降对滑坡的稳定性影响较大;短期降雨影响较小,但时间增长滑坡失稳概率增加;地震峰值对滑坡稳定性影响较为明显。同时根据分析结果对滑坡体进行了工况及荷载组合,并对各工况组合进行了稳定性计算及评价,得出水位下降时滑坡稳定性处于极限状态,在蓄水地震工况下失稳概率较大。
To study the stability of a landslide mass at the Carla hydropower station,this work analyzes a series of internal factors such as the landslide mechanism,landform,geological structure and geotechnical parameter sensitivity.The result shows that with the slope uplifting and slope dilatancy intensifying of the landslide mass,slope instability tends to occur.Poor combination of bedding planes with joint fissures may provide a boundary for slope deformation and instability,and fissures in the steep slope of fractures make infiltration of groundwater possible.Landslide stability is enhanced with the increasing geotechnical strength parameters.Sensitivity analysis on external factors including rainfall,water level fluctuation and earthquakes illustrates that sharp fluctuations of water level exert a major influence on the landslide stability.Short-term rainfall has a little effect on landslide stability,but with increasing time,it will make slope instability more possible.The earthquake peak value exerts a prominent effect on landslide stability.Furthermore,based on the analyses above,various combinations of the conditions of landslide and loads are considered,and calculation and evaluation of stability are conducted according to these combinations.The conclusion is that landslide stability is in its limit state when the water level drops,and instability probability is bigger under the conditions of storage and seismic activity.
To study the stability of a landslide mass at the Carla hydropower station,this work analyzes a series of internal factors such as the landslide mechanism,landform,geological structure and geotechnical parameter sensitivity.The result shows that with the slope uplifting and slope dilatancy intensifying of the landslide mass,slope instability tends to occur.Poor combination of bedding planes with joint fissures may provide a boundary for slope deformation and instability,and fissures in the steep slope of fractures make infiltration of groundwater possible.Landslide stability is enhanced with the increasing geotechnical strength parameters.Sensitivity analysis on external factors including rainfall,water level fluctuation and earthquakes illustrates that sharp fluctuations of water level exert a major influence on the landslide stability.Short-term rainfall has a little effect on landslide stability,but with increasing time,it will make slope instability more possible.The earthquake peak value exerts a prominent effect on landslide stability.Furthermore,based on the analyses above,various combinations of the conditions of landslide and loads are considered,and calculation and evaluation of stability are conducted according to these combinations.The conclusion is that landslide stability is in its limit state when the water level drops,and instability probability is bigger under the conditions of storage and seismic activity.
引文
[1]谭跃虎,李红英,李二兵2010.雅砻江卡拉水电站预可研选坝阶段工程区滑坡风险评估研究[R].
Chen Zu-yu.2003.Soil slope stability analysis—theory methods andprograms[M].Beijing:China Water Conservancy and HydropowerPublishing House:1-350(in Chinese)
Cui Fang-peng,Hu Rui-lin.2008.Study on formation mechanism andstability Evaluation of badashan landslide group in Qinghai Province[J].Chinese Journal of Rock Mechanics and Engineering,27(4):848-857(in Chinese).
Deng Jian-hui,Chen Fei.2007.Geological origin and stability evaluation of Siwancun landslide in Luding County[J].Chinese Journal ofRock Mechanics and Engineering,26(10):1945-1950(in Chinese)
Ji Feng,Zhong Hu-ping.2010.Characteristics and stability of a largelandslide in the Yalong river[J].South to North Water Transfersand Water Science&Technology,08(5):92-94(in Chinese withEnglish abstract)
Li Qiang,Guan Chang-sheng,Zhou Wu.2001.Reliability analysis oflandslide stability by Monte-carlo method[J].Chinese Journal ofRock Mechanics and Engineering,20(增):1674-1676(in Chinese)
Li Zong-jie,Tan Yue-hu,Li Er-bing,Zhao Hui.2010.Geologicalcharacteristic and risk evaluation on Batong landslide of the Yalongriver[J].Mineral Exploration,1(1):89-94(in Chinese with English abstract)
Sun Min.2005.The influence factors of Saturated-unsaturated seepageand the influence on slope stability[D].Nanjing:Hehai University:32-38(in Chinese)
Song Yanhui,Hang Minqi.2009.Study on deformation characteristics andstability of the high slope of converging stilling basins of Cihaxia hydropower station[J].Geology and Prospecting,45(2):107-111(in Chinese with English abstract)
Tan Qin,Liang li,Xiang peng,Fu Xiang.2011.Stability analysis of soilslope after sharply descending of level[J].Journal of Dalian JiaotongUniversity,32(2):46-49(in Chinese)
Tang Ya-ming,Zhang Mao-sheng,Li lin,Xue Qiang.2011.Discrimination to the landslide susceptibility,hazard and risk assessment[J].Hydrogeology&Engineering geology,38(2):125-129(in Chinesewith English abstract)
Wang Ping-wei,Peng Zhen-bin.2007.Water affecting on the stabilityof the soil slope[J].Geology and Prospecting.43(3):121-122(inChinese)
Xie Fei-hong,Wang Jin-shan,Yin Ho-yue.2005.Landslide analysisand treatment in the aera of Cheng-nan expressway[J].ChineseJournal of Rock Mechanics and Engineering,24(增2):5795-5798(in Chinese with English abstract)
Yuan Jing,Zhang Xiu-li.2005.Slope reliability analysis based on theMonte-carlo method[J].Liaoning Engineering Technology University Journals,24(2):10-12(in Chinese with English abstract)
Yang Ming,Zhang Ke-neng.2009.Monte carlo simulation of homogeneous soil slope reliability based on Matlab[J].Geology and Exploration,45(1):89-94(in Chinese)
Yu Qing-yuan.2010.Application of Monte-carlo method in slope stability analysis[J].Shanxi Architecture,36(9):74-75(in Chinesewith English abstract)
Zhu Yu-xue.1993.Slope Reliability Analysis[M].Beijing:MetallurgyIndustry Press:136-280(in Chinese)
Zhao Guo-pan Jin Wei-liang.1989.Structural Reliability Theory[M].Beijing:China Architecture&Building Press:1-280(in Chinese)
Zhang Xian-gong,Wang Si-jing,Zhang Zhuo-yuan.2000.EngineeringGeology in China[M].Beijing:Science Press:1-139(in Chinese)
Zang Ya-jun,Liu Dong-yan,Jiang Ke-feng.2008.Cause analysis ofcoal gangue landslide in the dongl in coal mine Chongqing[J].Geology and Prospecting,44(4):87-92.(in Chinese).
Zhao Hui,Tan Yu-ehu,Xu Hui,Yuan Ze-gang.2010.Application of Monte-Carlo method to Shangtian landslide’s reliability analysis[J].Chinese Journal of Underground Space and Engineering,6(5):938-945(in Chinese)
陈祖煜.2003.土质边坡稳定分析--原理方法程序[M].北京:北京水利水电出版社:1-350
崔芳鹏,胡瑞林.2008.青海八大山滑坡群形成机制及稳定性评价研究[J].岩石力学与工程学报,27(4):848-857
邓建辉,陈菲.2007.泸定县四湾村滑坡的地质成因与稳定评价[J].岩石力学与工程学报,26(10):1945-1950
吉锋,钟湖平.2010.雅砻江中游某特大型滑坡,基本特征及稳定性初步分析[J].南水北调与水利科技,08(5):92-94
李强,管长生,周武.2001.基于Monte-carlo法的滑坡稳定可靠性分析[J].岩石力学与工程学报,20(增):1674-1676
李宗杰,谭跃虎,李二兵,赵辉.2010.雅砻江八通滑坡地质特征及风险评价[J].矿产勘察,1(1):89-94
孙敏.2005.饱和-非饱和渗流影响因素及对土坡稳定性影响研究[D].南京:河海大学:32-38
宋彦辉,黄民奇.2009.茨哈峡水电站消能池高边坡变形特征及稳定性研究[J].地质与勘探,45(2):107-111
覃勤,梁莉,向鹏,傅翔.2011.水位骤降条件下某滑坡的稳定性分析[J].大连交通大学学报,32(2):46-49
唐亚明,张茂省,李林,薛强.2011.滑坡易发性危险性风险评价例析[J].水文地质工程地质,38(2):125-129
王平卫,彭振斌.2007.水对土质边坡的稳定影响分析[J].地质与勘探,43(3):121-122
谢飞鸿,王锦山,尹伯悦.2005.成南高速公路滑坡稳定性分析及治理[J].岩石力学与工程学报,24(增2):5795-5798
袁景,张秀丽.2005.基于蒙特卡洛方法的边坡可靠性分析[J].辽宁工程技术大学学报,24(2):10-12
杨明,张可能.2009.基于MATLAB的均质土坡稳定可靠度的蒙特卡罗模拟[J].地质与勘探,45(1):89-94
于清缘.2010.蒙特卡罗法在边坡稳定性分析中的应用[J].山西建筑,36(9):74-75
祝玉学.1993.边坡可靠性分析[M].北京:冶金工业出版社:136280
赵国藩,金伟量.2000.结构可靠度理论[M].北京:中国建筑工业出社:1-280
张咸恭,望思敬,张倬元.2000.中国工程地质学[M].北京:科学出版社:1-139
臧亚军,刘东燕,蒋克锋.2008.重庆矿区山矸石山滑坡成因分析[J].地质与勘探.44(4):87-92
赵辉,谭跃虎,徐辉,袁泽纲.2010.雅砻江上田边坡可靠性蒙特卡洛方法综合运用[J].地下空间与工程学报,6(5):938-945
Chen Zu-yu.2003.Soil slope stability analysis—theory methods andprograms[M].Beijing:China Water Conservancy and HydropowerPublishing House:1-350(in Chinese)
Cui Fang-peng,Hu Rui-lin.2008.Study on formation mechanism andstability Evaluation of badashan landslide group in Qinghai Province[J].Chinese Journal of Rock Mechanics and Engineering,27(4):848-857(in Chinese).
Deng Jian-hui,Chen Fei.2007.Geological origin and stability evaluation of Siwancun landslide in Luding County[J].Chinese Journal ofRock Mechanics and Engineering,26(10):1945-1950(in Chinese)
Ji Feng,Zhong Hu-ping.2010.Characteristics and stability of a largelandslide in the Yalong river[J].South to North Water Transfersand Water Science&Technology,08(5):92-94(in Chinese withEnglish abstract)
Li Qiang,Guan Chang-sheng,Zhou Wu.2001.Reliability analysis oflandslide stability by Monte-carlo method[J].Chinese Journal ofRock Mechanics and Engineering,20(增):1674-1676(in Chinese)
Li Zong-jie,Tan Yue-hu,Li Er-bing,Zhao Hui.2010.Geologicalcharacteristic and risk evaluation on Batong landslide of the Yalongriver[J].Mineral Exploration,1(1):89-94(in Chinese with English abstract)
Sun Min.2005.The influence factors of Saturated-unsaturated seepageand the influence on slope stability[D].Nanjing:Hehai University:32-38(in Chinese)
Song Yanhui,Hang Minqi.2009.Study on deformation characteristics andstability of the high slope of converging stilling basins of Cihaxia hydropower station[J].Geology and Prospecting,45(2):107-111(in Chinese with English abstract)
Tan Qin,Liang li,Xiang peng,Fu Xiang.2011.Stability analysis of soilslope after sharply descending of level[J].Journal of Dalian JiaotongUniversity,32(2):46-49(in Chinese)
Tang Ya-ming,Zhang Mao-sheng,Li lin,Xue Qiang.2011.Discrimination to the landslide susceptibility,hazard and risk assessment[J].Hydrogeology&Engineering geology,38(2):125-129(in Chinesewith English abstract)
Wang Ping-wei,Peng Zhen-bin.2007.Water affecting on the stabilityof the soil slope[J].Geology and Prospecting.43(3):121-122(inChinese)
Xie Fei-hong,Wang Jin-shan,Yin Ho-yue.2005.Landslide analysisand treatment in the aera of Cheng-nan expressway[J].ChineseJournal of Rock Mechanics and Engineering,24(增2):5795-5798(in Chinese with English abstract)
Yuan Jing,Zhang Xiu-li.2005.Slope reliability analysis based on theMonte-carlo method[J].Liaoning Engineering Technology University Journals,24(2):10-12(in Chinese with English abstract)
Yang Ming,Zhang Ke-neng.2009.Monte carlo simulation of homogeneous soil slope reliability based on Matlab[J].Geology and Exploration,45(1):89-94(in Chinese)
Yu Qing-yuan.2010.Application of Monte-carlo method in slope stability analysis[J].Shanxi Architecture,36(9):74-75(in Chinesewith English abstract)
Zhu Yu-xue.1993.Slope Reliability Analysis[M].Beijing:MetallurgyIndustry Press:136-280(in Chinese)
Zhao Guo-pan Jin Wei-liang.1989.Structural Reliability Theory[M].Beijing:China Architecture&Building Press:1-280(in Chinese)
Zhang Xian-gong,Wang Si-jing,Zhang Zhuo-yuan.2000.EngineeringGeology in China[M].Beijing:Science Press:1-139(in Chinese)
Zang Ya-jun,Liu Dong-yan,Jiang Ke-feng.2008.Cause analysis ofcoal gangue landslide in the dongl in coal mine Chongqing[J].Geology and Prospecting,44(4):87-92.(in Chinese).
Zhao Hui,Tan Yu-ehu,Xu Hui,Yuan Ze-gang.2010.Application of Monte-Carlo method to Shangtian landslide’s reliability analysis[J].Chinese Journal of Underground Space and Engineering,6(5):938-945(in Chinese)
陈祖煜.2003.土质边坡稳定分析--原理方法程序[M].北京:北京水利水电出版社:1-350
崔芳鹏,胡瑞林.2008.青海八大山滑坡群形成机制及稳定性评价研究[J].岩石力学与工程学报,27(4):848-857
邓建辉,陈菲.2007.泸定县四湾村滑坡的地质成因与稳定评价[J].岩石力学与工程学报,26(10):1945-1950
吉锋,钟湖平.2010.雅砻江中游某特大型滑坡,基本特征及稳定性初步分析[J].南水北调与水利科技,08(5):92-94
李强,管长生,周武.2001.基于Monte-carlo法的滑坡稳定可靠性分析[J].岩石力学与工程学报,20(增):1674-1676
李宗杰,谭跃虎,李二兵,赵辉.2010.雅砻江八通滑坡地质特征及风险评价[J].矿产勘察,1(1):89-94
孙敏.2005.饱和-非饱和渗流影响因素及对土坡稳定性影响研究[D].南京:河海大学:32-38
宋彦辉,黄民奇.2009.茨哈峡水电站消能池高边坡变形特征及稳定性研究[J].地质与勘探,45(2):107-111
覃勤,梁莉,向鹏,傅翔.2011.水位骤降条件下某滑坡的稳定性分析[J].大连交通大学学报,32(2):46-49
唐亚明,张茂省,李林,薛强.2011.滑坡易发性危险性风险评价例析[J].水文地质工程地质,38(2):125-129
王平卫,彭振斌.2007.水对土质边坡的稳定影响分析[J].地质与勘探,43(3):121-122
谢飞鸿,王锦山,尹伯悦.2005.成南高速公路滑坡稳定性分析及治理[J].岩石力学与工程学报,24(增2):5795-5798
袁景,张秀丽.2005.基于蒙特卡洛方法的边坡可靠性分析[J].辽宁工程技术大学学报,24(2):10-12
杨明,张可能.2009.基于MATLAB的均质土坡稳定可靠度的蒙特卡罗模拟[J].地质与勘探,45(1):89-94
于清缘.2010.蒙特卡罗法在边坡稳定性分析中的应用[J].山西建筑,36(9):74-75
祝玉学.1993.边坡可靠性分析[M].北京:冶金工业出版社:136280
赵国藩,金伟量.2000.结构可靠度理论[M].北京:中国建筑工业出社:1-280
张咸恭,望思敬,张倬元.2000.中国工程地质学[M].北京:科学出版社:1-139
臧亚军,刘东燕,蒋克锋.2008.重庆矿区山矸石山滑坡成因分析[J].地质与勘探.44(4):87-92
赵辉,谭跃虎,徐辉,袁泽纲.2010.雅砻江上田边坡可靠性蒙特卡洛方法综合运用[J].地下空间与工程学报,6(5):938-945
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