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温度对土的物理力学特性有较大影响,在等温条件下对宁波软黏土开展了增p、等p和减p剪切路径下的温控三轴试验,获得了不同温度、不同应力路径下的应力、孔压、有效应力路径等的变化规律。结果表明:土体的应力—应变特性呈现出较为明显的热硬化特征;温度越高,土体破坏时的偏应力越大,剪切产生的孔压越小,有效应力路径随温度的升高向总应力路径方向发生偏转;减p、等p、增p剪切路径下获得的剪应力峰值依次递增,增p和等p剪切路径下产生正孔压,减p剪切路径下产生负孔压,试样呈现剪胀现象。
Temperature on the physical and mechanical properties of soil has a greater impact on the isothermal conditions of Ningbo soft clay by increasing p, p and p-cut temperature-controlled triaxial test under the path of access to different temperatures and different stress path Stress, pore pressure, effective stress path and other changes. The results show that the stress-strain characteristics of soil show obvious thermosetting characteristics. The higher the temperature is, the larger the deviatoric stress is, the smaller the pore pressure is. The effective stress path increases with temperature To the direction of the total stress deflection; minus p, such as p, increasing the shear stress in the p-clipping path in order to increase the peak value, by p and other positive p-path shear path P positive pressure, minus P clipping path to produce negative Hole pressure, the sample showed dilatancy.