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天然土的结构性、各向异性对其强度有影响.进行固结压力100kPa、主应力轴恒定偏转角为0°,15°,30°,45°,60°的恒定主应力轴偏转角的固结不排水剪切试验,分析了不同恒定主应力轴偏转角对饱和软黏土固结不排水剪切强度影响;推导了总应力控制恒定主应力轴偏转角剪切试验总应力路径,编制了总应力控制剪切三维点积分程序,对比恒定主应力轴偏转角饱和软黏土固结不排水剪切强度计算值与试验结果,表明程序能很好地反应各向异性对土剪切强度影响.
The structure and anisotropy of natural soil have an impact on its strength.When the consolidation pressure is 100kPa and the constant principal stress axes are 0 °, 15 °, 30 °, 45 ° and 60 ° The consolidation undrained shear test analyzes the influence of different constant principal stress axis deflection angles on the undrained shear strength of saturated soft clay consolidation. The total stress path of constant stress axis deflection shear stress test is deduced. The total stress controlled shear 3D point integral program is compared with the calculated values and experimental results of undrained shear strength of saturated soft clay consolidated by constant principal stress axis deflection angle, indicating that the program can well reflect the anisotropic influence on soil shear strength.