几个工点的岩石抗剪强度和剪应力应变特征  

The Characteristics of Shear Strength and Shear Stress Strain of Rocks in Several Projects

作　　者：任伟中[1] 余祥宏[2] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]中交第二公路勘察设计研究院,武汉430052

出　　处：《土工基础》2000年第4期45-48,共4页Soil Engineering and Foundation

摘　　要：对三个工点岩石现场直剪试验结果和剪应力应变曲线进行分析 ,认为Ⅰ #岩石脆性较明显 ,Ⅱ #、Ⅲ #岩石的韧性 (延性 )特征明显 ,岩石抗剪强度指标建议值以大位移残馀强度为基准 ,对脆性岩石取值严格些 ,取低值 ,对韧性岩石取值偏高些。文中论述了上述认识和作法的依据 ,并对有关的其他问题进行了讨论。The resalts of in situ direct shear tests and their shear stress strain curves are analysed for rocks in 3 projects.It was found the fragility of rock Ⅰ# is more fragile and the tenacity of rock Ⅱ# and Ⅲ# is more pronounced.It is recommended that large displacement residual strenght is used as a base for rock strength.The lower value is more strictly applied for fragil rock and higher value for tenacious rock.In this paper,the principle mentioned above is introduced and some problems are discussed.

关 键 词：抗剪强度 剪应力应变关系 岩体 

分 类 号：TU459.2[建筑科学—岩土工程]