泥质白云岩结构面抗剪强度各向异性的数值模拟  

Research on Anisotropy of Shear Strength of Structural Plane of Argillaceous Dolomite

作　　者：祝艳波[1] 杨艳霞 曾红彪[1] 李科[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]西北综合勘察设计研究院,陕西西安710003

出　　处：《水电能源科学》2013年第7期127-129,28,共4页Water Resources and Power

摘　　要：针对结构面抗剪强度的各向异性对坝基稳定性评价的影响问题,利用3DEC模拟软件对泥质白云岩结构面进行直剪模拟试验,研究了其抗剪强度随粗糙度变化的特征。结果表明,泥质白云岩结构面的粗糙度越大,剪切应力—剪切位移曲线峰值越明显,结构面的抗剪强度越大,抗剪强度参数也越大;法向应力水平越高,粗糙度对结构面抗剪强度的影响越弱。In view of the shear strength anisotropy of structural plane which effects on the dam foundation stability e valuation, the discrete element program 3DEC is used to simulate direct shear test for argillaceous dolomite structure surface in order to study the shear strength characteristics changed with the roughness. The results show that the greater the roughness of argillaceous dolomite structure surface is, the more obvious the peak of shear stress and shear displacement curve is; the shear strength and its parameters of the structure increase with the arising of roughness of the structural plane; the larger the normal stress is, the weaker the influence of roughness on the shear strength of structural plane is.

关 键 词：泥质白云岩 结构面 抗剪强度 各向异性 数值模拟 

分 类 号：TU452[建筑科学—岩土工程]