节理三维形貌与抗剪强度相关性研究  

Research on Relativity between Three-dimensional Morphology of Rock Joints and Shear Strength

作　　者：姚孟迪[1] 荣冠[1,2] 侯迪[1] 尹鹏海[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072

出　　处：《水电能源科学》2013年第12期163-166,162,共5页Water Resources and Power

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013501;2010CB732005);新世纪优秀人才计划资助项目(NCET-11-0406)

摘　　要：岩石节理的表面形貌对其力学特性具有重要影响。运用JAW-1000试验系统开展不同节理试样的剪切试验,得到不同法向应力条件下节理试样的剪切变形曲线和法向变形曲线,并利用KEYENCE_LK-G5000激光扫描仪在剪切前后对节理试样表面形貌进行高精度激光扫描测试,得到节理试样表面三维形貌数据。根据改进的节理三维形貌表征参数的算法,分析剪切试验前后节理试样表面三维形貌变化,研究节理三维形貌表征参数与抗剪强度的关系。结果表明,三维平均视倾斜角越大,抗剪强度越大,并提出了三维平均视倾斜角与抗剪强度的经验模型。Surface morphology of rock joints has great impact on its strength properties. A series of shear tests of joint specimens are conducted on JAW-1000 test system, and stress-displacement curves under different normal stresses are obtained. Data of three-dimensional （3D） morphology of joint specimens before and after shear test is obtained with KEYENCE_I.K-G5000 laser scanner. Belem＇s method for quantifying 3D morphology of rock joints is improved and the variation of 3D morphology of joint specimens before and after shear test is analyzed. It is found that the larger the 3D av- erage visual inclination angle is, the larger the shear strength is. Finally, an empirical model is proposed to relate 3D morphology parameter with the shear strength of rock joints.

关 键 词：岩石节理 剪切试验 抗剪强度 三维形貌 

分 类 号：TU45[建筑科学—岩土工程]