降雨型滑坡垂直位移方向率及其位移监测预警判据研究

发布时间：2018-04-05 08:48

本文选题：降雨型滑坡　切入点：垂直位移方向率　出处：《岩土力学》2017年12期

【摘要】：针对降雨型滑坡位移量预测参数失稳判据的局限和不足,并根据滑坡全息论的基本原理,提出和确定了滑坡垂直位移方向率预测参数,且指出该参数是边坡稳定性演化分析与评价的一个有效位移动力参数,具有位移量或位移速率不可替代的评价和预测作用。同时,系统分析了降雨型滑坡位移与地下水位变化规律及其相互作用关系,对该类边坡稳定性的不同演化阶段的表层垂直位移方向率形成机制与变化规律进行了弹塑性力学分析与评价,分别确定了边坡压缩稳定变形阶段和塑性失稳变形阶段的表层垂直位移方向率与其稳定性演化的定量关系,并依此运用数理统计均方差基本原理,建立了该类滑坡垂直位移方向率的整体失稳监测预警判据。最后运用新滩滑坡A_3、B_3监测点垂直位移方向率对该滑坡稳定性演化过程与失稳规律进行了后验分析与评价,其分析预测结果与边坡实际变形失稳规律基本相吻合,表明该参数在该类滑坡预测预报与监测预警中具有一定的有效性与实用性。
[Abstract]:In view of the limitation and deficiency of the instability criterion of landslide displacement prediction parameters, and according to the basic principle of landslide holography, the prediction parameters of landslide vertical displacement direction rate are proposed and determined.It is pointed out that this parameter is an effective displacement dynamic parameter for the analysis and evaluation of slope stability, and it can not be substituted for the evaluation and prediction of displacement or displacement rate.At the same time, the relationship between the displacement of rainfall landslide and groundwater level and its interaction is analyzed systematically.The forming mechanism and variation law of vertical displacement direction rate in different evolution stages of this kind of slope are analyzed and evaluated by elastoplastic mechanics.The quantitative relationship between the vertical displacement direction rate of the surface layer and the stability evolution of the slope in the compression stable deformation stage and the plastic unstable deformation stage is determined, and the basic principle of mathematical statistical mean square error is applied.An early warning criterion for global instability monitoring of this kind of landslide with vertical displacement direction rate is established.Finally, a posterior analysis and evaluation of the landslide stability evolution process and instability law are carried out by using the vertical displacement direction rate of the monitoring point Aji _ 3O _ B _ 3 of Xintan landslide. The results of the analysis and prediction are basically consistent with the actual deformation and instability law of the slope.It is shown that this parameter is effective and practical in the prediction, monitoring and early warning of this kind of landslide.
【作者单位】：三峡大学三峡库区地质灾害教育部重点实验室;青岛理工大学地质环境与效应研究中心;
【基金】：国家自然科学基金资助项目(No.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(No.2017KDZ03) 高等学校博士学科点专项科研基金(No.20113721110002) 山东省自然科学基金项目(No.ZR2011DL002) 山东省蓝色经济区工程建设与安全协同创新中心资助项目~~
【分类号】：P642.22

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