降雨主导型库岸滑坡变形时空分布特征  

Spatiotemporal distribution characteristics of reservoir bank landslide deformation driven by rainfall

作　　者：邓宏艳[1,2,3] 孔纪名[2,3] 

机构地区：[1]西南交通大学,四川成都610031 [2]中国科学院山地灾害与地表过程重点实验室,四川成都610041 [3]中国科学院水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《自然灾害学报》2012年第1期148-154,共7页Journal of Natural Disasters

基　　金：国家自然科学基金重点项目(50639070);国家科技支撑计划项目(2006BAC10B04)

摘　　要：根据某大型水库近坝库岸滑坡8年的监测资料,对该滑坡变形的时空分布特征进行了分析。该滑坡变形的空间分布特征主要表现为3个方面的差异,即区域差异、高程差异和深度差异。而滑坡变形的时间分布特征主要体现在库水作用和降雨两个方面:在重点监测的Ⅱ区,库水作用只影响到其前端部分,对中、后部影响很小;该区的整体变形与降雨关系密切,响应明显。这些特征表明该滑坡为降雨主导型库岸滑坡,并有向稳定方向发展的趋势;但Ⅱ区特有的"后坐式"变形特征又存在一定的安全隐患,因此,该滑坡的监测还应长期进行。Based on the monitoring data of some reservoir landslide at bank near dam in 8 years, spatiotemporal distribution characteristics of the landslide deformation were analyzed. The space characteristics of the deformation are reflected in differences of three aspects： region, high level and depth. The temporal characteristics of deformation are reflected in reservoir levels and rainfalls ： in the key monitored region Ⅱ , only the front part was influenced by the reservoir level, while the overall deformation of this region obviously closely related to rainfall. Through the analysis, we concluded that the landslide is driven mainly by rainfall, and it has a trend of going on to stability. However, monitoring should be continuing because of the hidden danger of the ＂sitting behind＂ type deformation in region Ⅱ.

关 键 词：降雨主导型库岸滑坡 滑坡变形 时空分布特征 滑坡监测 

分 类 号：P642.22[天文地球—工程地质学]