反倾层状岩质边坡破坏机制研究——以锦屏一级水电站左岸边坡为例  

Study on losing stability mechanism of flare rock slopes——A case study of the left bank slope of Jingping first-stage hydropower station

作　　者：苏立海[1,2] 李婉[1] 李宁[2] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]西安理工大学,陕西西安710048

出　　处：《四川建筑科学研究》2012年第1期109-114,共6页Sichuan Building Science

摘　　要：顺层边坡稳定性研究已有大量成果,现今的分析方法、分析模型也都是针对此类边坡的,而反向边坡其典型的结构特征为岩层层面与边坡面走向一致但倾向相反,如果同时存在一组或多组顺坡向的节理将岩层切割成离散的块体,则容易发生与以往不同的倾倒破坏。对于这种反倾层状岩质边坡的破坏模式与机理,系统的研究成果尚未见报道。因此,本文应用从奥地利引进的大型岩土工程数值仿真分析系统FINAL为平台,建立几种代表性典型岩质边坡模型,通过特殊离散化有限元模型与数值试验,考虑不同岩层倾角、不同层面裂隙间距及不同软弱夹层与坡角影响,研究这类边坡的倾倒破坏模式与破坏机理,以便直接为工程设计提供依据。At present, there are already a lot of fruits in research on stability of consequent rock slope. By far, the analysis model and the analysis method both aim at this type of slope. But the reverse slope which typical structure characteristic is the strata heeding surface and slope strike the same but the opposite tendency, at the same time if there are one or more positive slope direction joints which will cut rock layer to discrete blocks,it is more prone to tilting failure which is different from anciently. For such antidip layered rock slope, the system study of its failure mode and mechanical have never be reported up to today. Therefore, this paper use a large geotechnical engineering simulation analysis system FINAL which introduce from Austria as a platform, establish several typical antidip layered rock slope model. Through special discrete finite element model and test of numerical value, the slope tilting failure mechanical and mode are studied, and directly provide reference to engineering design.

关 键 词：反倾 离散化 破坏模式 层面裂隙 

分 类 号：U418.5[交通运输工程—道路与铁道工程]