水库型堆积层滑坡位移方向协调性参数及其失稳判据研究  

Research on the displacement direction coordination parameter of colluvial landslide induced by reservoir and its warning destabilized criterion

作　　者：郭璐[1] 贺可强[1] 贾玉跃[1] GUO Lu;HE Keqiang;JIA Yuyue(Engineering Technique Research Center of Geo-Environment and Impact,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学地质环境与效应研究中心,山东青岛266033

出　　处：《水利学报》2018年第12期1532-1540,共9页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(41372297);三峡库区地质灾害教育部重点实验室(三峡大学)开放基金(2017KDZ03);山东省自然科学基金项目(ZR2017PD011)

摘　　要：水库型堆积层边坡位移受库水位循环涨落及降雨的影响,具有波动与震荡的特点,然而其位移变化与突变多为库水位涨落及降雨所引起,并非一定缘于边坡稳定性降低。因此,运用传统单维度位移预测参数与判据分析该类滑坡稳定性时,经常会引起误判。针对传统单维度位移预测参数与失稳判据的局限性,本文根据滑坡全息论的基本原理,提出垂直位移方向率这一水库型堆积层边坡稳定性评价的位移方向协调性参数,并深入分析与确定了水库型堆积层边坡弹性压缩变形阶段和塑性失稳变形阶段该参数与其稳定性演化的定量关系。在此基础上,根据数理统计趋势位移分析原理,建立了边坡稳定性判据准则,并运用新滩边坡F系列监测点实际位移数据进行了垂直位移方向率的稳定性计算与分析。预测分析结果与该边坡实际稳定性演化阶段相吻合,说明垂直位移方向率参数在水库型堆积层滑坡稳定性评价与监测预警中具有一定的有效性。The displacement of colluvial landslide in reservoir area is affected by the circulating fluctuation of reservoir water level and rainfall and has the characteristics of fluctuation and oscillation. However,the change and mutation of the displacement are mostly caused by the fluctuation of reservoir water level and rainfall,which are not necessarily due to the decrease of slope stability. Therefore,using the traditional single-dimension displacement prediction parameters and criteria to analyze the stability of landslides oftencauses misjudgment. For this problem,this paper proposes the vertical displacement direction rate as an ef-fective displacement direction coordination parameter for the analysis and evaluation of slope stability evolu-tion according to the basic principle of holographic theory of landslide. Meanwhile,the quantitative relation-ship between surface vertical displacement direction rate and the evolution of stability in the compressionstage and the plastic deformation stage of slope are deeply analyzed and determined. Based on the analysisresults above,this paper establishes the monitoring and warning criteria of the vertical displacement direc-tion rate of the colluvial landslide induced by reservoir through the basic trend displacement analysis princi-ple of mathematical statistics. According to the vertical displacement direction rate parameter and the criteri-on, the stability of Xintan landslide is calculated and discriminated by the data of F series monitoringpoints. The prediction coincide with actual deformation of slope in different instability stage,it reveals thatthe vertical displacement direction rate parameter is effective in the stability evaluation and warning of colluvial landslide induced by reservoir.

关 键 词：水库型堆积层滑坡 垂直位移方向率 趋势位移判据 新滩滑坡 

分 类 号：P642.22[天文地球—工程地质学]