【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。更多还原

【Abstract】 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.更多还原