三峡库区滑坡的水文地质分析  

Hydrogeology analysis of landslides in Three Gorges reservoir area

作　　者：陈有亮[1] 刘明亮[1] 蒋立浩[1] 

机构地区：[1]上海理工大学土木工程系,上海200093

出　　处：《水资源与水工程学报》2011年第1期22-25,共4页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金资助项目(10872133);上海市浦江人才计划资助项目(09PJ1407700)

摘　　要：三峡库区滑坡灾害发生频繁,这些滑坡灾害对当地的经济建设和生命财产造成了很大的危害,如何对滑坡进行有效的预测预报成为滑坡减灾防灾的关键。降雨是触发三峡库区滑坡的重要外动力因素之一。通过这一地区预警站——秭归二级站的多年降雨量与剖面排桩观测资料的数据统计和相关性分析,可以发现当降雨量达到某一特定值时,滑坡容易发生。根据秭归县的地形地貌、地质构造和岩性组合等特点,初步对郭家寨和李家湾这两个预警点进行分析,利用统计方法得出两个观测点在不同降水条件下的排桩变形。分析结果表明:由于地质环境以及岩性的不同,达到滑坡所需要的降雨量存在差异,基于月降雨量的统计分析可望实现对突发性滑坡进行实时有效的预报。The geological hazards occur with high frequency in Three Gorges reservoir area.The landslide disasters have caused serious loss to the local economic development,the life and property.How to predict the landslides is one of the key problems for preventing hazards and reducing economical loss and casualties.The rainfall is the dominant exterior factor triggering the landslides.Through the statistics and correlation analysis for the observation data of rainfall and deformation of section piles from the Zigui early-warning station in many years,it could be found that if the rainfall reaches a specific threshold value,the probability of landslide increases rapidly.Based on the topography,geological structures and lithology combination in Zigui County,the relations between pile deformation and precipitation condition for Guojiazhai Station and Lijiawan Station were obtained by means of statistical method.It could be found from the obtained results that the specific threshold value of rainfall varied with different geological environment and lithology.The real-time sudden landslide is expected to be predicted based on statistical analysis of monthly precipitation.

关 键 词：三峡库区 月降雨量 滑坡 排桩变形 岩性 

分 类 号：P641[天文地球—地质矿产勘探]