鄂西清江隔河岩水库茅坪滑坡蠕滑变形及其稳定性
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摘要
茅坪滑坡是清江隔河岩库区一个大型的基岩古滑坡体。自1993年4月隔河岩水库蓄水以来,滑坡体变形日趋明显,表现为整体蠕滑的特征。根据该滑坡12年的变形监测资料,分析了滑坡的蠕滑变形特征及其变化趋势,认为茅坪滑坡变形具有累进性破坏的特点,目前处于加速蠕变阶段。稳定计算结果也表明,滑坡体处于一种潜在临界不稳定状态。若遇强降雨、库水位骤降、岩崩或地震等触发因素,茅坪滑坡有可能整体失稳下滑。
The Maoping landslide is a large and old landslide of the bed rock in the Geheyan reservoir area of the Qingjiang River. Since the reservoir was impounded in April 1993, the deformation of the landslide is conspicuous progressively and shows the characteristics of holistic creeping. According to the deformation monitoring data over 12 years, the authors analyze the creeping properties and variation trend of the landslide and think that the deformation of the Maoping landslide has the feature of progressive failure and is in the stage of accelerated creeping at present. The stability calculation also indicates that the landslide is in a latent critical unstable state. It is possible that the landslide might lose its stability and slide down en masse if there occur trigger factors such as heavy rains, abrupt lowering of the reservoir water level, avalanches and earthquakes.
The Maoping landslide is a large and old landslide of the bed rock in the Geheyan reservoir area of the Qingjiang River. Since the reservoir was impounded in April 1993, the deformation of the landslide is conspicuous progressively and shows the characteristics of holistic creeping. According to the deformation monitoring data over 12 years, the authors analyze the creeping properties and variation trend of the landslide and think that the deformation of the Maoping landslide has the feature of progressive failure and is in the stage of accelerated creeping at present. The stability calculation also indicates that the landslide is in a latent critical unstable state. It is possible that the landslide might lose its stability and slide down en masse if there occur trigger factors such as heavy rains, abrupt lowering of the reservoir water level, avalanches and earthquakes.
引文
[1]Sarma S K.A note on the stability analysis of slopes[J].Geotech-nique,1987,37(1):101-111.
[2]Jaehong Kim,Sangseom Jeong,Seongwan Park,et al.Influence of rainfall-induced wetting on the stability of slopes in weathered soils[J].Engineering Geology,2004,(75):251-262.
[3]Tan Chengxuan,Wang Ruijiang,Wu Shuren,et al.Analysis on landslides stability by using three-dimensional numerical simulation[J].Journal of Changchun University of Science and Technology,1999,29(3):267-271.
[4]Azm S A1-Homoud,Ahmad B Tal,Salah A Taqieddin.A comparative study of slope stability methods and mitigative design of a highway embankment landslide with a potential for deep seated sliding[J].Engineering Geology,1997,47:157-173.
[5]殷跃平.三峡库区地下水渗透压力对滑坡稳定性影响研究[J].中国地质灾害与防治学报,2003,14(3):1-8.
[6]马水山,李迪,张保军,等.茅坪滑坡体位移特征及其发展趋势预测[J].长江科学院院报,1994,11(3):72-79.
[7]马水山,张保军,李端友.清江库岸滑坡体位移曲线及变形趋势研究[J].人民长江,1995,(12):38-43.
[8]严福章,王思敬,徐瑞春.清江隔河岩水库蓄水后茅坪滑坡的变形机理及其发展趋势研究[J].工程地质学报,2003,11(1):15-20.
[9]邓建辉,马水山,张保军,等.清江隔河岩水库茅坪滑坡复活机理初探[J].岩石力学与工程学报,2003,22(10):1730-1737.
[10]钟式范,马水山,张保军.隔河岩水利枢纽水库蓄水对岸坡稳定性的影响[J].岩石力学与工程学报,1996,15(3):282-288.
[11]王尚庆,易庆林,严学清.清江隔河岩库区茅坪滑坡变形特征及其影响因素[J].中国地质灾害与防治学报,1999,10(2):40-44.
[12]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994:123-133.
[13]F W Wanga,Kyoji Sassab,Gonghui Wang.Mechanism of a long-runout landslide triggered by the August1998heavy rain fall in Fukushima Prefecture,Japan[J].Engineering Geology,2002,63:169-185.
[14]Faruk Ocakoglu,Candan Gokceoglu,Murat Ercanoglu.Dy-namics of a complex mass movement triggered by heavy rain-fall:a case study from NW Turkey[J].Geomorphology,2002,42:329-341.
[15]殷坤龙,汪洋,唐仲华.降雨对滑坡的作用机理及动态模拟研究[J].地质科技情报,2002,21(1):75-78.
[16]吴树仁,石菊松,张永双,等.滑坡宏观机理研究——以三峡库区为例[J].地质通报,2006,25(7):874-879.
[17]罗晓红,李进元.水库蓄水对库岸滑坡影响分析[J].水电站设计,2003,19(3):61-65.
[18]袁中友,唐晓春.蓄水和水位变动对三峡库区崩塌滑坡的影响及对策[J].热带地理,2003,23(1):30-34.
[19]陈祖煜.岩质边坡稳定分析——原理、方法、程序[M].北京:中国水利水电出版社,2005.
[2]Jaehong Kim,Sangseom Jeong,Seongwan Park,et al.Influence of rainfall-induced wetting on the stability of slopes in weathered soils[J].Engineering Geology,2004,(75):251-262.
[3]Tan Chengxuan,Wang Ruijiang,Wu Shuren,et al.Analysis on landslides stability by using three-dimensional numerical simulation[J].Journal of Changchun University of Science and Technology,1999,29(3):267-271.
[4]Azm S A1-Homoud,Ahmad B Tal,Salah A Taqieddin.A comparative study of slope stability methods and mitigative design of a highway embankment landslide with a potential for deep seated sliding[J].Engineering Geology,1997,47:157-173.
[5]殷跃平.三峡库区地下水渗透压力对滑坡稳定性影响研究[J].中国地质灾害与防治学报,2003,14(3):1-8.
[6]马水山,李迪,张保军,等.茅坪滑坡体位移特征及其发展趋势预测[J].长江科学院院报,1994,11(3):72-79.
[7]马水山,张保军,李端友.清江库岸滑坡体位移曲线及变形趋势研究[J].人民长江,1995,(12):38-43.
[8]严福章,王思敬,徐瑞春.清江隔河岩水库蓄水后茅坪滑坡的变形机理及其发展趋势研究[J].工程地质学报,2003,11(1):15-20.
[9]邓建辉,马水山,张保军,等.清江隔河岩水库茅坪滑坡复活机理初探[J].岩石力学与工程学报,2003,22(10):1730-1737.
[10]钟式范,马水山,张保军.隔河岩水利枢纽水库蓄水对岸坡稳定性的影响[J].岩石力学与工程学报,1996,15(3):282-288.
[11]王尚庆,易庆林,严学清.清江隔河岩库区茅坪滑坡变形特征及其影响因素[J].中国地质灾害与防治学报,1999,10(2):40-44.
[12]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994:123-133.
[13]F W Wanga,Kyoji Sassab,Gonghui Wang.Mechanism of a long-runout landslide triggered by the August1998heavy rain fall in Fukushima Prefecture,Japan[J].Engineering Geology,2002,63:169-185.
[14]Faruk Ocakoglu,Candan Gokceoglu,Murat Ercanoglu.Dy-namics of a complex mass movement triggered by heavy rain-fall:a case study from NW Turkey[J].Geomorphology,2002,42:329-341.
[15]殷坤龙,汪洋,唐仲华.降雨对滑坡的作用机理及动态模拟研究[J].地质科技情报,2002,21(1):75-78.
[16]吴树仁,石菊松,张永双,等.滑坡宏观机理研究——以三峡库区为例[J].地质通报,2006,25(7):874-879.
[17]罗晓红,李进元.水库蓄水对库岸滑坡影响分析[J].水电站设计,2003,19(3):61-65.
[18]袁中友,唐晓春.蓄水和水位变动对三峡库区崩塌滑坡的影响及对策[J].热带地理,2003,23(1):30-34.
[19]陈祖煜.岩质边坡稳定分析——原理、方法、程序[M].北京:中国水利水电出版社,2005.
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