小浪底水利枢纽东苗家滑坡预警系统研究  

Early warning system of Dongmiaojia landslide body in Xiaolangdi water control project

作　　者：刘汉东[1] 王四巍[1] 

机构地区：[1]华北水利水电大学岩土力学与水工结构研究院,郑州450045

出　　处：《水力发电学报》2017年第9期1-9,共9页Journal of Hydroelectric Engineering

基　　金：国家科技支撑计划(2015BAB07B08);国家水利公益性行业科研专项(201301034)

摘　　要：利用Flac3D分析了小浪底水利枢纽东苗家滑坡的稳定性,滑坡体在正常条件下整体处于稳定状态,在暴雨工况下出现较大变形,可能诱发滑坡体破坏。基于17年的滑坡表观和深部变形监测数据,分析了滑坡发展趋势。在稳定性分析和发展趋势判别基础上,布置了表观及深部变形、渗压、降雨等监测项目,建立了物联网自动化监测方案和预警系统。提出了东苗家滑坡体的三级失稳预警模式,分别确定了各级失稳模式的降雨量、变形速率等指标的预警阈值。In this study we analyzed the stability of the Dongmiaojia landslide body in the Xiaolangdi water control project using Flac3 D numerical simulations. This landslide body is stable in the normal condition and unstable during heavy rains or earthquakes; in heavy rain conditions, relative large displacements occur to it and may further trigger a fast sliding. From the data of monitoring its surface layer appearances and deep layer deformation for 17 years, we analyzed its sliding trend. Using stability analysis and sliding trend analysis, automatic monitoring schemes were designed and an Internet of Things monitoring system was developed. Detailed monitoring methods were arranged in this study, such as those used for surface and deep deformation, seepage pressure, and precipitation. For the Dongmiaojia landslide body, we recommended a system of three-level failure warning along with a method to determine the warning threshold of rainfall, deformation rate, and other indexes.

关 键 词：东苗家滑坡 边坡稳定性分析 监测 预警系统 

分 类 号：P694[天文地球—地质学]