摘要:
滑坡是国内外最为常见的地质灾害类型之一,虽然其形成和稳定性受多种因素影响,从而表现出多种类型的变形破坏机制,如蠕滑-拉裂型、滑移-弯曲型等,但不同类型滑坡其变形破坏均具有一定的代表性。因此,针对典型滑坡进行深入研究,对类似成因滑坡研究具有很好的借鉴作用。为此,本文结合白鹤滩水电站近坝的恩子坪2#滑移-拉裂型滑坡,通过对其形态、物质组成、结构及变形破坏等特征的详细调查与分析,对其影响因素进行了论述并对其稳定性进行了定性评价。在此基础上,采用三维有限元数值模拟分析方法,对该典型滑坡的稳定性及变形破坏接近程度进行了深入分析,并与二维极限平衡分析评价结果进行了对比。
Abstract:
Landslide is one of the most familiar geohazards types both national and international.Its formation and stability are influenced by many factors.Thereby,there are many mechanism types of deformation and destruction,such as creep-sliding and fracturing,bending and fracturing,and so on.But the deformation and destruction of different landslide types all have the definite representation.So, further study on the representative landslide will have very good use for reference to the landslide which has the similar cause of formation.Therefor,combined with Enziping 2~# landslide,which mechanism is sliding and fracturing and locates near by the dam of Baihetan hydropower station,and through the detailed investigation and analysis to the characteristics,such as configuration,substance formation,structures and deformation and destruction,and so on,the influencing factors are discussed and its qualitative stability is evaluated.Furthermaor,the stability and the approach level of deformation and destruction are deeply analysed to the typical landslide using the three-dementional finite element analysis method,the results are compared with the evaluation outcome using two-dimension limiting equilibrium analytical method.
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