柱状节理玄武岩体抗剪强度参数尺寸效应研究  

SIZE EFFECT ON SHEAR STRENGTH OF BASALT ROCK MASS WITH COLUMNAR JOINTS

作　　者：刘顺桂[1] 池永翔[2,3] 王思敬[1] 刘海宁[4] 石安池[5] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国地质大学环境学院,湖北武汉430074 [3]福建省地质调查研究院,福建福州350013 [4]华北水利水电学院,河南郑州450008 [5]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《工程地质学报》2009年第3期367-370,共4页Journal of Engineering Geology

摘　　要：结合柱状节理玄武岩块室内直剪试验和现场大尺度直剪试验所取得不同尺度岩块的抗剪参数试验成果,进行异计拟合回归分析得到柱状节理玄武岩体抗剪强度参数内聚力c和内摩擦系数f的尺寸效应经验表达式,认为抗剪强度参数与试样尺寸间近似呈幂函数形式。抗剪强度参数的表征单元体积研究表明,内聚力对试样的尺寸更为敏感。This paper is based on the results of in - situ and laboratory direct tests of basalt rock mass with columnar joints. Allometric curves are fitted with the test data and empirical formulas are obtained about the shear strength of the basalt rock mass with columnar joints. The analysis shows that the values of the cohesion c and the internal frictional coefficient f vary approximately with the size of test samples as power functions. The representative elementary volumes of the c and fare analyzed. The cohesive force is more sensitive to the size of samples.

关 键 词：柱状节理玄武岩体 抗剪强度参数 尺寸效应 表征单元体积 

分 类 号：P642[天文地球—工程地质学]