在进行野外大型岩体抗剪试验时,制备未受扰动的岩体试样是比较困难的,特别是在坚硬而裂隙比较发育的岩体上切割试样尤其困难。在野外,我们经常要从较少的岩体试样中获得尽可能多的试验数据,因此,要特别精细地整理和分析所取得的试验资料。目前,一般都是采用库仑-莫尔法进行试验数据的整理与分析,借助于τ=C+σtgψ的直线公式,首先找出直线的斜率tgψ,再确定凝聚力C,直线τ=C+σtgψ应当通过初始抗剪 In the field of large-scale rock mass shear tests, it is difficult to prepare undisturbed rock mass specimens, especially for cutting specimens on hard and fractured rock masses. In the field, we often need to obtain as many test data as possible from fewer rock samples. Therefore, the test data obtained must be carefully and analytically analyzed. At present, the Coulomb-Mohr method is generally used for the collation and analysis of test data. With the help of the straight line formula of τ=C+σtgψ, the slope tgψ of the straight line is firstly found, and the cohesion C is then determined. The straight line τ=C+σtgψshould Through the initial shear