作　　者： ; ; ;

机构地区： 南京工业大学土木工程学院

出　　处： 《岩石力学与工程学报》 2009年第A02期3477-3483,共7页

摘　　要： 在T.Belem三维表面粗糙度表征理论的基础上,进一步引入与剪切方向、渗流方向密切相关的裂隙表面局部坡向概念,从定义裂隙表面三维几何形态离散化后的局部倾斜角与局部坡向入手,提出描述裂隙各向异性的三维表面粗糙度参数JRC估计方法,并与传统方法进行对比分析。研究表明,提出的裂隙粗糙度的表征方法抓住了裂隙表面几何特征对其力学特性影响的关联特征,较好地反映出裂隙具有强烈的各向异性特征,算例试验表明传统忽略各向异性的JRC表征结果与实际情况偏差为15%～35%。 Based on T.Belem＇s theory for three-dimensional surface roughness,the local aspect concept is introduced,which is closely related to the directions of shear and seepage.By defining the local tilt angle and aspect after the three-dimensional geometric shape discretization,the JRC estimation method of the three-dimensional surface roughness parameters for describing the characteristic of anisotropy is proposed and compared with traditional methods,which can reflect the obvious anisotropy of rock fracture well for grasping the association characteristics of surface geometric characteristics＇s effect on its mechanical characteristics of rock fractures,while the deviation of the JRC result of traditional method neglecting anisotropy is 15%-35% with actual situation.

关 键 词： 岩石力学 裂隙 粗糙度 各向异性

领　　域： [建筑科学] [建筑科学]