陡倾片麻岩滑坡影响因素分析——以兰陵溪滑坡为例  

Analysis of Factors Affecting Steeply Dipping Gneiss Landslides——a Case Study of Lanlingxi Landslide

作　　者：周一骥 党超[1,2] 王建平 马思哲 ZHOU Yiji;DANG Chao;WANG Jianping;MA Sizhe(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education(China Three Gorges University),Yichang 443002,China;College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡库区地质灾害教育部重点实验室(三峡大学),湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《三峡大学学报(自然科学版)》2025年第2期41-47,共7页Journal of China Three Gorges University:Natural Sciences

基　　金：国家自然科学基金青年基金项目(41701013)。

摘　　要：兰陵溪溪口至衫木溪溪口是三峡库区特有变质岩区域,该区域发育的滑坡具有特殊性.本文以三峡库区兰陵溪滑坡为例,根据两年的监测数据按时间序列精细划分,采用过程分析法与定量分析法研究影响滑坡变形的因素.结果表明:库水是影响滑坡变形的主要因素.库水位高于160 m时,库水以不同速率升降,兰陵溪滑坡发生强变形;库水位低于160 m,库水升降速率对滑坡变形无明显影响,滑坡处于缓慢变形期.降雨是诱发滑坡变形的次要因素.库水下降或上升耦合强降雨时,在降雨与库水作用下,诱发滑坡剧烈变形;低水位期,强降雨促进滑坡变形.由现场调查并结合监测数据分析可知,滑坡剪出口位于高程155 m附近.研究成果对兰陵溪滑坡的监测预警、防治工程等提供科学依据,对同类型涉水岩质滑坡成因分析与变形机制分析提供借鉴.The region between estuaries of Lanlingxi Creek and Shanmu Creek is a unique metamorphic rock area in the Three Gorges Reservoir Area,and the landslides developed in this area have special characteristics.In this paper,the Lanlingxi landslide in Three Gorges Reservoir Area is taken as an example.Based on two years'monitoring data in time series,the process analysis method and quantitative analysis method are used to study the factors affecting landslide deformation.The results show that:the reservoir water is the main factor affecting the landslide deformation.When the reservoir level is higher than 160 m,the reservoir water rises and falls at different rates,and strong deformation occurs in the landslide of Lanlingxi Creek.When the reservoir level is lower than 160 m,the rate of the reservoir water rises and falls does not have any obvious effect on the landslide deformation,and the landslide is in the period of slow deformation.Rainfall is a secondary factor inducing landslide deformation.When the reservoir water falls or rises[HJ2.05mm]coupled with strong rainfall,the landslide is induced to deform violently.Especially,during the period of low water level,the strong rainfall promotes the landslide deformation.Combined with the field investigation and monitoring data,it can be seen that the landslide shear exit is located near the elevation of 155 m.The research results provide scientific basis for monitoring and early warning,prevention and control works of the landslides in Lanlingxi Creek,and provide reference for the analysis of the causes and deformation mechanisms of the same type of water-related rocky landslides.

关 键 词：三峡库区 兰陵溪滑坡 位移监测数据 精细划分 

分 类 号：P642.22[天文地球—工程地质学]