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.
出处
《人民长江》
北大核心
2011年第14期42-45,63,共5页
Yangtze River
关键词
边坡稳定
弹塑性有限元
加固支护
大岗山水电站
slope stability
elasto-plastic FEM
supporting reinforcement
Dagangshan Hydropower Station
