黄河某水电站库区Ⅲ~#滑坡形成机制研究

发布时间：2018-04-11 23:04

  本文选题：滑坡 + 顺向边坡　； 参考：《长江科学院院报》2017年04期

【摘要】：倾倒-变形多发生在逆向层状边坡内,但在近几年工程勘查中发现,陡倾顺向边坡也存在该种失稳模式,研究其形成机制对正确评价工程边坡的稳定性有着重要意义。以西北黄河流域某水电站坝前右岸的Ⅲ~#滑坡为例,在地质勘察的基础上,结合数值模拟和定性分析得出:滑坡的形成过程分为河谷下切、坡表卸荷,岩层发生倾倒-变形,滑移-拉裂3个阶段,利用UDEC再现了滑坡的形成过程。利用有限元和离散元计算得到的结果互相吻合,证明了结论的合理性。
[Abstract]:Toppling and deformation often occur in reverse layered slopes, but in recent years, it is found that this kind of instability mode also exists in steep slope, and it is very important to study its formation mechanism to evaluate the stability of engineering slope correctly.Taking the landslide of the right bank in front of the dam of a hydropower station in the northwest Yellow River Basin as an example, on the basis of geological investigation, combined with numerical simulation and qualitative analysis, it is concluded that the forming process of the landslide is divided into valley cutting, slope surface unloading, rock strata toppling and deformation.The process of landslide formation was reproduced by UDEC in three stages of slip-tension fracture.The results obtained by finite element method and discrete element method are in agreement with each other, which proves the rationality of the conclusion.
【作者单位】： 成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金项目(41072229)
【分类号】：TV221.2;P642.22
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本文编号：1738048