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本文通过对含粘粒(粘粒含量≤9％)重塑砂土的自振柱和动三轴试验研究,探讨了其剪切模量和液化势随粘粒含量变化的一般规律:并通过X光扫描电镜,对含粘粒砂土的颗粒结构进行了观察,分析了其动剪切模量和抗液化性能随粘粒含量的增大而减小的机理。 研究的结果还表明,以动剪切模量间接预测含粘粒的砂土的液化势是可能的。
In this paper, we studied the self-vibration column and dynamic triaxial test of remolded sand containing clay (clay content ≤ 9%), and discussed the general law of shear modulus and liquefaction potential with clay content change: X-ray scanning electron microscopy (SEM) was used to observe the grain structure of clay-containing sands, and the mechanism of the reduction of dynamic shear modulus and liquefaction resistance with the increase of clay content was analyzed. The results of the study also show that it is possible to indirectly predict the liquefaction potential of sand-containing clays with dynamic shear moduli.