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本文通过对三轴振动试验成果的分析,证明饱和砂土由于振动而产生的孔隙水压力所受到应力条件的影响应包括“静水压力”和剪应力两个部分。因此,不但需要考虑主应力值σ_1和而且还需要考虑主应力比σ_1/σ_3的影响。试验还指出,砂土颗粒骨架结构的抗振稳定性还显著地与砂土颗粒排列状态和它们形成的历史过程有关。这个关系不能够简单地用砂土密度来衡量。
In this paper, through the analysis of the results of the triaxial vibration test, it is proved that the impact of the stress conditions on the pore water pressure due to the vibration of saturated sand should include the “static water pressure” and the shear stress. Therefore, not only the principal stress value σ_1 but also the principal stress ratio σ_1/σ_3 need to be considered. The experiment also pointed out that the anti-vibration stability of the sand grain skeleton structure is also significantly related to the sand particle arrangement state and the history of their formation. This relationship cannot be simply measured by sand density.