基于剪切行为结构面形貌特征的描述  

Description of discontinuities morphology based on shear behavior

作　　者：宋磊博 江权[2] 李元辉[1] 杨成祥[1] 冉曙光[2] 王百林[3] 刘挺[3] SONG Lei-bo JIANG Quan LI Yuan-hui YANG Cheng-xiang RAN Shu-guang WANG Bai-lin LIU Ting(Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, Liaoning 110819, China State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China Headquarters of Expressway Construction in Ningbo, Ningbo, Zhejiang 315000, China)

机构地区：[1]东北大学深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [3]宁波市高等级公路建设指挥部,浙江宁波315000

出　　处：《岩土力学》2017年第2期525-533,共9页Rock and Soil Mechanics

基　　金：国家重点研发计划(No.2016YFC0600707);国家自然科学基金资助(No.51579043);中央高校基本科研业务费项目(No.120701001);supported by the Key Research Development Program of China(2016YFC0600707);the National Natural Science Foundation of China(51579043);the Fundamental Research Funds for the Central Universities(120701001)

摘　　要：描述岩石结构面形貌特征的一个重要作用就是为了能更好地理解结构面的剪切行为。首先,从结构面剪切具有方向性的特点出发,抓住在剪切方向上对剪切行为起关键作用的结构面形貌特征,提出描述结构面形貌特征的参数抗剪系数SC。该参数描述了在剪切方向上二维形貌的起伏特征、起伏的统计分布特征以及高度特征,并且还可以表征结构面形貌的方向性。同时,在对10条节理粗糙度系数JRC标准曲线的数字化基础上,建立了抗剪系数SC与JRC值之间的拟合关系。基于三维白光扫描技术得到的自然岩石结构面的点云数据,进一步将抗剪系数SC进行了三维化扩展,使其能够较好地描述结构面的三维形貌特征。最后,以某自然岩石结构面为算例,用三维抗剪系数SC3D度量其沿不同分析方向上的形貌特征,结果表明,抗剪系数能很好地表征结构面形貌特征的各向异性。Description of rock morphology is of great significance to better understand the shear behavior of the discontinuities. Firstly, from the shear directional characteristics of the discontinuities, a new index SC（shear coefficient） describing discontinuities morphology is proposed based on some pivotal role on shear behavior of its morphology in the shear direction. The index describes undulation characteristics, statistical distribution of undulation and height characteristics of two-dimensional discontinuities morphology in the shear direction, and can also characterize directionality of the morphology. Moreover, the relationship between SC and JRC（joint roughness coefficient） is established based on 10 digitized JRC standard curves. Then, with the help of point cloud data of rock discontinuities obtained by three-dimensional（3D） white scanner, the shear coefficient SC is extended to 3D to better characterize 3D morphology characteristics of discontinuities. Finally, the three-dimensional shear coefficient（SC3D） is used to quantify morphology of natural rock discontinuities in different directions. It is shown that SC can well represent anisotropic morphology characteristics of discontinuities.

关 键 词：岩石结构面 剪切行为 结构面形貌特征 节理粗糙度系数 三维扫描 各向异性 

分 类 号：TU45[建筑科学—岩土工程]