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利用动--静态空心圆柱扭剪仪,采用两种不同的成样方法制备空心圆柱试样,在不排水条件下控制平均主应力和中主应力系数保持不变,进行单调扭剪试验。并着重讨论成样方法对重塑粉土孔隙水压力发展、应力——应变关系、破坏模式、有效应力路径等特性的影响。研究表明:在主应力轴连续偏转的不排水条件下,成样方法对重塑饱和粉土变形及强度特性具有显著影响。
Hollow cylindrical specimens were prepared by dynamic-static hollow cylindrical torsion shears with two different sample-forming methods. Under undrained conditions, the average principal stress and the medium principal stress coefficient remained unchanged, and the monotonic torsion shear tests were carried out. The effects of sample-forming methods on the development of pore-water pressure, stress-strain relationship, failure mode and effective stress path are also discussed. The results show that the sample-forming method has a significant effect on the deformation and strength characteristics of the remolded saturated silt under undrained conditions of continuous deflection of the principal stress axis.