三峡库首区某滑坡变形特征及影响因素分析
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摘要
针对库区地质灾害的特点,以三峡库首区秭归县某滑坡为例,基于近年来GPS位移监测、库区降雨与水位变化资料,分析了滑坡的变形特征,并研究了降雨与库水位变化因素对滑坡变形的影响。结果表明,该滑坡变形区呈推动式变形特征,其水平累积位移曲线具周期性台阶状位移特征,且受降雨和库水位变化影响较大,两者联合作用影响更大。
According to the characteristics of geological hazards in head region of Three Gorges Reservoir,a certain landslide in Zigui City is chosen to study its deformation characteristics by using the data of rainfall,water level and displacement monitoring with GPS in recent years.And then the influence of the rainfall and reservoir water level on deformation of landslide is analyzed.The results show that it is a lapsed landslide from the displacement curves;the horizontal accumulated displacement curve has characteristics of periodic step shape,which is greatly influenced by rainfall and reservoir water level;especially,it is more influenced by joint action of theses two factors.
According to the characteristics of geological hazards in head region of Three Gorges Reservoir,a certain landslide in Zigui City is chosen to study its deformation characteristics by using the data of rainfall,water level and displacement monitoring with GPS in recent years.And then the influence of the rainfall and reservoir water level on deformation of landslide is analyzed.The results show that it is a lapsed landslide from the displacement curves;the horizontal accumulated displacement curve has characteristics of periodic step shape,which is greatly influenced by rainfall and reservoir water level;especially,it is more influenced by joint action of theses two factors.
引文
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[7]吉锋,钟湖平.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,2010,8(5):92-94,166.
[2]王锦国,盛立云.三峡库区奉节县新城植物油厂滑坡地下水动力场分析[J].水电能源科学,2009,27(4):61-63.
[3]李远耀.三峡库区渐进式库岸滑坡的预测预报研究[D].武汉:中国地质大学,2010.
[4]杜榕桓,刘新民,袁建模,等.长江三峡工程库区滑坡与泥石流研究[M].成都:四川科学技术出版社,1990.
[5]刘才华,陈从新,冯夏庭.库水位上升诱发边坡失稳机理研究[J].岩土力学,2005,26(5):769-773.
[6]罗红明,唐辉明,章广成,等.库水位涨落对库岸滑坡稳定性的影响[J].地球科学中国地质大学学报,2008,33(5):687-692.
[7]吉锋,钟湖平.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,2010,8(5):92-94,166.
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