小湾水电站地下厂房洞室群弹脆塑性分析  

ANALYSIS OF UNDERGROUND POWERHOUSES IN XIAOWAN HYDROPOWER STATION BY ELASTIC-BRITTLE-PLASTIC CONSTITUTIVE MODELS

作　　者：王水林[1] 李春光[1] 史贵才[1] 葛修润[1] 郑宏[1] 

机构地区：[1]中国科学院岩土力学重点实验室,湖北武汉430071

出　　处：《岩石力学与工程学报》2005年第24期4449-4454,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：针对小湾水电站枢纽区岩性特点与所处的地应力环境,采用脆塑性本构模型,分析了地下厂房洞室群开挖后围岩的变形与破损区;同时比较了使用脆塑性与弹塑性本构模型时计算结果的差异。由于地下厂房洞室群区域受到多条断层切割,洞室开挖完成后,在断层经过的部位,断层对洞室的变形与破损区有一定的控制作用。针对工程中所关心的断层对洞室稳定性的影响程度,通过断层材料的置换,定量地给出了在断层经过的区域、断层对洞室表面的变形的影响以及断层对洞室围岩的破损区的影响。In response to the characteristic of rock masses and initial geostresses in Xiaowan Hydropower Station, elastic-brittle-plastic （EBP） constitutive model is employed to analyze the deformation and plastic zone of the rock mass surrounding the underground structures after the completion of excavation. Meanwhile, elastic-plastic （EP） model is also applied to analyse the problems. The results obtained by the two models are compared and the difference between them is obvious. Considering that several faults intersect the underground caverns, the effects of the faults on both deformation and the damage zone by the replacement of the infillings of them are presented. Numerical results show that faults exert much influence on the stabilities of the caverns when the faults are near the surfaces of the caverns.

关 键 词：数值计算 有限元方法 弹脆塑性本构模型 洞室群稳定性分析 小湾水电工程 

分 类 号：O242[理学—计算数学] TV731[理学—数学]