| 三峡库区白家包滑坡变形特征与影响因素分析 |
| |
| 引用本文： | 彭令,牛瑞卿.三峡库区白家包滑坡变形特征与影响因素分析[J].中国地质灾害与防治学报,2011,22(4):1-7. |
| |
| 作者姓名： | 彭令 牛瑞卿 |
| |
| 作者单位： | 中国地质大学地球物理与空间信息学院,湖北武汉,430074 |
| |
| 基金项目： | 国家自然科学基金，国土资源部三峡库区三期地质灾害防治重大科学研究项目 |
| |
| 摘 要： | 针对三峡库区阶跃型滑坡,以白家包滑坡为例,统计分析滑坡位移、变形速率和裂缝监测数据。显示滑坡在2007年6月之前为蠕动变形初期,受降雨和库水位等外界因素的作用,6月滑坡发生剧烈变形,之后一直保持约75°方向滑动。滑坡体中前部位移速率大于后缘,其变形具有牵引式特点。滑体上裂缝与变形位移具有一致性,位移量越大的区域裂缝越发育。将位移速率与降雨、库水位和地下水进行影响机制分析,建立滑坡变形与外界动态影响因素之间的响应关系。结果表明降雨量和库水位变化是引起滑坡季节性变形的主要因素,其中降雨强度、库水位下降及下降速率是导致滑坡位移速率波动大小的关键因子。
|
| 关 键 词： | 白家包滑坡 降雨 库水位 地下水 三峡库区 |
Analysis on deformation characteristics and influential factors of Baijiabao landslide in the Three Gorges Reservoir area |
| |
| PENG Ling,NIU Rui-qing.Analysis on deformation characteristics and influential factors of Baijiabao landslide in the Three Gorges Reservoir area[J].The Chinese Journal of Geological Hazard and Control,2011,22(4):1-7. |
| |
| Authors: | PENG Ling NIU Rui-qing |
| |
| Institution: | PENG Ling,NIU Rui-qing(Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China) |
| |
| Abstract: | The Baijiabao landslide in the Three Gorges reservoir area has been used as a case study.Statistical analysis of landslide displacement,deformation rate and crack monitoring data,it shows that the landslide was in prime creeping deformation before June 2007.The landslide was acute deformation under the influence of external factors effect in the June month,and then kept about 75°direction sliding.The frontal part of displacement rate was greater than the trailing edge of the landslide.So the deformation of landslide has towing forward characteristics.Cracks and deformation of the landslide were consistent,and the greater displacement of the regional where the crack more development.The mechanism of rainfall,reservoir water level and ground water level effect on seasonal displacement rate of landslide was analyzed.And the response relationship between landslide deformation and external dynamic influential factors was established.The result shows that the rainfall and reservoir water level was the main factors of the seasonal displacement of landslide.Especially,rainfall intensity,drawdown of reservoir water level and the rate of drawdown of reservoir water level were the key factors of the amplitude of the displacement rate. |
| |
| Keywords: | Baijiabao landslide rainfall reservoir water level ground water level Three Gorges Reservoir |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
