长甸水电站改造工程渣场堆渣边坡稳定分析
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摘要
边坡稳定对工程安全意义重大,文中利用极限平衡法及基于离散元的强度折减法,建立堆渣边坡二维剖面模型及三维模型,分析了天然、暴雨、地震工况下的长甸水电站改造工程弃渣场堆渣边坡的稳定性。天然条件和暴雨工况下的边坡潜在失稳模式表现为一定深度范围内的圆弧滑动,地震工况下边坡变形响应相对突出的位置主要集中在中高高程至坡顶位置,分析结果表明,渣场各工况下堆渣边坡稳定性均满足规范安全系数要求。
The slope stability has the significant influence on the engineering safety. The limit equilibrium method and the strength reduction method based on the discrete element are used to build the two-dimensional section model and the threedimensional model of the slag field slope, the stability of the slag field slope of the abandoned dreg site of reconstruction project of the Changdian hydropower station under the natural, rainstorm and seismic conditions are analyzed. The potential instability mode of the slope under the condition of natural and rainstorm condition are shown as the arc sliding in a certain depth below the slope surface and the relatively prominent position of the slope deformation response are mainly concentrated in the middle and high elevation to the top of the slope under the seismic condition. The analysis results show that the stability of slag field slope meets the requirements of the standard under all working conditions.
The slope stability has the significant influence on the engineering safety. The limit equilibrium method and the strength reduction method based on the discrete element are used to build the two-dimensional section model and the threedimensional model of the slag field slope, the stability of the slag field slope of the abandoned dreg site of reconstruction project of the Changdian hydropower station under the natural, rainstorm and seismic conditions are analyzed. The potential instability mode of the slope under the condition of natural and rainstorm condition are shown as the arc sliding in a certain depth below the slope surface and the relatively prominent position of the slope deformation response are mainly concentrated in the middle and high elevation to the top of the slope under the seismic condition. The analysis results show that the stability of slag field slope meets the requirements of the standard under all working conditions.
引文
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[3]李双平.边坡稳定性分析方法及其应用综述[J].人民长江,2010,41(20):12-15.
[4]王肇慧,肖盛燮,刘文方.边坡稳定性计算方法的对比分析[J].重庆交通大学学报(自然科学版),2005,24(6):99-103.
[5]袁利伟,金龙哲,李素敏,等.基于ABAQUS的尾渣场稳定性分析[J].安全与环境学报,2014,14(1).
[6]吴志斌,王陈琦,曾江波,等.不同降雨强度下渣土受纳场边坡地下水渗流和稳定性的数值模拟分析[J].安全与环境工程,2017(4).
[7]郑颖人,叶海林,黄润秋,等.边坡地震稳定性分析探讨[J].地震工程与工程振动,2010,30(02):173-180.