层状节理岩体变形特性数值模拟研究  

Numerical Simulation of Deformation Characteristics of Layered Jointed Rockmass

作　　者：孙旭曙[1] 程冬[1] 黄叶宁 李飞[1] 何葭桐 迟健[1] 刘洋[1] Sun Xushu Cheng Dong Huang Yening Li Fei He Jiatong Chi Jian Liu Yang(College of Hydraulic ＆ Environmental Engineering, China Three Gorges Univ. , Yichang 443002,Chin)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2017年第3期32-35,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金资助(51279091;51439003);国家科技支撑计划项目(2015BAB07B08);公益性行业科研专项(201401029);三峡库区地质灾害教育部重点实验室(三峡大学)开放基金(2015KDZ12)

摘　　要：层状节理岩体变形特性的研究,对于实际工程确定其力学参数具有重要参考作用.本文选取层状节理岩体为研究对象,分别建立不同倾角、不同尺寸层状节理岩体三维数值计算模型,采用FLAC3D软件模拟单轴压缩试验,研究了层状节理岩体不同方向弹性模量的各向异性特性和尺寸效应.研究表明:沿节理走向的弹性模量受节理倾角和模型尺寸影响极小;沿倾向和高程方向的弹性模量随节理倾角增大呈U型分布,且具对称性,其各向异性特性显著;随着模型尺寸增大,不同倾角层状节理岩体的弹性模量变化规律不一致,但总体减小且趋于稳定;采用多项式拟合层状节理岩体主要变形方向的变形参数函数并求导,可确定其典型单元体尺寸和等效变形参数.The study of deformation characteristics of layered jointed rock masses has an important reference function for determining the mechanical parameters of practical engineering. In this paper, layered jointed rock masses are taken as the research object. Then three-dimensional numerical model of layered jointed rock masses with different dip angles and different sizes is established. In addition, the uniaxial compression test is simulated to study anisotropy of elastic modulus in different directions of layered jointed rock masses and size effects with the FLAC3D software. It is shown that the elastic modulus along the joint direction is minimal affected by the joint dip and the model size. And the elastic modulus along the dip and the elevation is U-shaped with the increase of the dip angle; moreover, it is symmetric and has obvious am so, with the increase of the model size, the elastic modulus of layered jointed rock dip angles. But it totality decreases and tends to be stable. Furthermore, the def of the main deformation direction of layered jointed rock masses is fitted by polyn size of the typical unit and equivalent deformation parameters can be determined.

关 键 词：层状节理岩体 数值模拟 各向异性 尺寸效应 

分 类 号：TV3[水利工程—水工结构工程]