【摘要】 综述了边坡工程结构面抗剪强度参数的获取方法,探讨了基于钻孔取芯的室内直剪试验设计方案。采用YDS携带式岩、土力学性质多功能试验仪,设计了某核电厂边坡结构面抗剪断直剪试验和摩擦直剪试验,比较了结构面抗剪强度参数的试验值和经验值,采用三维可变形离散元法数值还原了结构面抗剪断直剪试验全过程。试验表明:室内试验测得的某核电厂边坡结构面摩擦角为31.3～40.5°,粘聚力为285～365kPa。基于3DEC的数值直剪试验较好地模拟了抗剪断直剪试验的线弹性阶段、峰值阶段、峰后软化阶段和残余阶段,与室内直剪试验规律一致。两种方法可较好地应用于类似核电厂边坡工程中。更多还原

【Abstract】 The determination methods for the shear strength parameters of rock discontinuity planes of slopes are reviewed,and the schemes for indoor direct shear tests based on coring samples are discussed.The YDS portable multifunctional geotechnical tester was used to acquire the shear strength and the tangential strength of rock discontinuity planes of the slopes in a certain nuclear power plant.The testing values of the shear strength were compared with the empirical values.The whole process of direct shear test is numerically simulated by using the 3-dimensional deformable discrete element method.The results show that the range of the friction angle is 31.3 ～ 40.5°,and the cohesion is 285 ～ 365kPa.The numerical direct shear tests well simulate the four stages of shear tests which are elastic stage,peak stage,post-peak stage and residual stage,and the simulation results are in accord with the testing results.The two methods could be well applied to the similar slopes in other nuclear power plants.更多还原