三峡大学学报（自然科学版）2017，Vol.39Issue(5)：43-47,5.DOI:10.13393/j.cnki.issn.1672-948X.2017.05.009
节理倾角对类岩石试样力学特性影响试验研究
Experimental Study of Influence of Joint Inclinations on Mechanical Properties of Rock-like Samples
摘要
Abstract
In the dam foundation of Baihetan Hydropower Station,the columnar jointed rock mass is the main composition and there are many complicated joint planes in it;therefore,it exhibits remarkable anisotropy peculiarity.In order to investigate the anisotropy peculiarity of columnar jointed rock mass,using model test method,taking transverse joint into account,making right square prism columnar jointed samples with different inclination (β) ranges from 0° to 90° for uniaxial compression tests.Through uniaxial compression tests,the compressive strength,deformation modulus and peak strain are obtained.Meanwhile,the paper analyzes the characteristics of stress-strain curve,peak strength,deformation modulus,peak strain and failure mode of samples.The results show that:when β is between 0° and 15°,75°and 90°,stress-strain curve has a multipeak phenomenon;when β is between 30°and 60°,stress-strain curve is unimodal;the uniaxial compression strength has the minimum value at β=30°;and it reaches the maximum value at β=90°;the anisotropy ratio of the strength is as high as 11.12,which belongs to extremely high anisotropy.The deformation modulus has the minimum value at β=60;and it reaches the maximum value at β=90°;the peak strain has the minimum value at β=60°,and it reaches the maximum value at β=30°.There are two main failure modes of samples,which are the splitting failure of the material and the sliding failure which is along the joint surface.关键词
柱状节理岩体/试件/各向异性/单轴压缩试验/节理倾角Key words
columnar jointed rock mass/sample/anisotropy/uniaxial compression test/joint inclination分类
建筑与水利引用本文复制引用
刘攀,林志南,马戎荣,柯志强..节理倾角对类岩石试样力学特性影响试验研究[J].三峡大学学报（自然科学版）,2017,39(5):43-47,5.基金项目
国家自然科学基金项目资助(50911130366) （50911130366）
