大岗山水电站左岸缆机平台边坡稳定分析  

Slope stability analysis of left bank cable crane platform of Dagangshan Hydropower Station

作　　者：潘燕芳[1] 刘翔[1] 黎满林[1] 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《人民长江》2011年第14期42-45,63,共5页Yangtze River

摘　　要：大岗山水电站坝区边坡具有高地应力、高地震烈度、卸荷风化强烈的显著特点。为确保缆机平台边坡安全,采用二维弹塑性有限元方法模拟左岸缆机平台PLⅢ-PLⅢ剖面边坡开挖施工过程,对开挖过程中的应力变形特征及稳定性进行计算分析,研究边坡在逐层开挖逐层支护过程中的应力变形演化规律、预应力锚索对边坡的加固支护效果以及对边坡稳定性的影响。计算结果表明,在预应力锚索的及时加固下,边坡均处于稳定状态。The slope of Dagangshan Hydropower Station is characterized by high geo-stress,high seismic intensity and strong unloading and weathering effect.For guaranteeing the slope safety at cable platform,we simulate the excavation process of PLIII-PLIII cross-section by 2D FEM,and obtain the stress-strain characters and stability of the slope.The stress-strain evolution law of slope under excavation-supporting alternation and supporting effect of pre-stress cable to slope stability are investigated.The results reveal that the slope is in safe status by reinforcement of pre-stress cable in time.

关 键 词：边坡稳定 弹塑性有限元 加固支护 大岗山水电站 

分 类 号：TV698[水利工程—水利水电工程]