水库滑坡位移与水动力耦合预测参数及其评价方法研究

发布时间：2018-02-25 19:13

本文关键词： 水库滑坡动力增载位移响应比库水位评价参数黄土坡滑坡　出处：《水利学报》2017年05期 　论文类型：期刊论文

【摘要】：针对库水涨落诱发滑坡致灾机理,在系统分析水库边坡位移与库水位变化规律及其相互作用关系的基础上,运用弹塑性力学基本原理,提出了以库水位下降引起的边坡下滑动力增量作为边坡的加载动力参数,以相应边坡位移变化量作为边坡位移响应参数,以此确定水库边坡库水动力增载位移响应比参数并建立预测模型。运用动力增载位移响应比预测模型对三峡库区典型水库滑坡-黄土坡滑坡关键部位监测点进行了动力增载位移响应比计算,并采用Geostudio软件对该滑坡稳定性进行了数值模拟分析。该滑坡的位移响应特征与稳定性演化规律表明,该滑坡关键变形部位的动力增载位移响应比参数变化规律与其实际位移与稳定性演化规律基本吻合。研究结果表明了动力增载位移响应比参数是水库滑坡有效的位移动力评价参数,可运用该参数及其评价方法对水库滑坡进行稳定性分析与评价。
[Abstract]:In view of the mechanism of landslide induced by reservoir water fluctuation, based on the systematic analysis of the relationship between displacement of reservoir slope and reservoir water level and their interaction, the basic principle of elastoplastic mechanics is applied. The slope sliding dynamic increment caused by the drop of reservoir water level is used as the loading dynamic parameter of the slope, and the displacement variation of the corresponding slope is taken as the slope displacement response parameter. In this way, the parameters of hydrodynamic load increasing displacement response ratio of reservoir slope are determined and the prediction model is established. The monitoring points of the key parts of landslide and loess slope landslide in typical reservoir of three Gorges Reservoir area are studied by using the prediction model of dynamic load increasing displacement response ratio. The dynamic load-increasing displacement response ratio is calculated. The stability of the landslide is simulated by using Geostudio software. The displacement response characteristics and the evolution law of the landslide are shown. The variation law of the dynamic load-increasing displacement response ratio parameter in the key deformation part of the landslide is basically consistent with its actual displacement and stability evolution law. The research results show that the dynamic load-increasing displacement response ratio parameter is effective for the reservoir landslide. Displacement dynamic evaluation parameters, This parameter and its evaluation method can be used to analyze and evaluate the stability of reservoir landslide.
【作者单位】：青岛理工大学地质环境与效应工程技术研究中心;
【基金】：国家自然科学基金资助项目(41372297) 高等学校博士学科点专项科研基金(20113721110002) 山东省自然科学基金项目(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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