摘要
鉴于两河口水电站泄水建筑物进口边坡的稳定性直接影响到水电站的正常运行,基于实际地质条件,建立了三维数值计算模型,采用三维弹塑性有限差分法分析了该边坡开挖卸荷过程中的位移场、应力场和塑性区分布特征,揭示了边坡岩体潜在破坏部位分布规律,并评价了边坡的稳定性。结果表明,影响边坡稳定与安全的的主要因素是f1和fb13-04断层的切割、开挖坡比和Ⅴ类岩体的分布。结果可为边坡开挖后的支护形式设计及施工程序和施工方法的确定提供参考依据。
The normal operation of Lianghekou hydropower is determined by the stability of discharge structure inlet slope.Hence,three-dimensional numerical model based geological information was established by using 3Delastic-plastic finite difference method to analyze the distribution character of the displacement field,stress field and plastic zone during excavation.Then the potential damage zones of slope rock mass were studied and the stability of slope was evaluated.The results show that the fault f1 and fb13-04 intersection,excavation slope ratio and the distribution of V-type rock mass are the main factors influencing slope stability.It provides the foundation for slope excavation support form design,determining the construction procedures and construction methods.
出处
《水电能源科学》
北大核心
2016年第7期158-162,共5页
Water Resources and Power
基金
国家自然科学基金项目(51309181)
