论文部分内容阅读
通过GDS共振柱,研究了不同围压、不同掺和比对水泥软黏土小应变动力特性(动剪切模量和阻尼比)的影响,得到了水泥软黏土小应变动力特性的变化规律。随着应变幅值的增加,动剪切模量逐渐衰减。最大动剪切模量随有效围压的增大而线性增大;在相同应变水平下,随着水泥土掺和比增大,有效围压对动剪切模量的影响逐渐减小。随着应变幅值的增加,阻尼比逐渐增大。相同应变水平下,试样的阻尼比随有效围压的增大而有轻微地减小。水泥掺和比对阻尼比的影响较小,随着水泥掺和比的提高,相同应变水平下试样的阻尼比有略微地升高。与动剪切模量相比阻尼比对有效围压和掺和比的变化不敏感。
The influence of different confining pressure and different admixture ratio on the small strain dynamic characteristics (dynamic shear modulus and damping ratio) of cement soft clay was studied by GDS resonant column. The dynamic characteristics of small strain of cement soft clay were obtained. With the increase of strain amplitude, dynamic shear modulus gradually decayed. The maximum dynamic shear modulus increases linearly with the increase of effective confining pressure. Under the same strain level, the effect of effective confining pressure on dynamic shear modulus decreases with the increase of cement-soil mixing ratio. As the strain amplitude increases, the damping ratio increases gradually. At the same strain level, the damping ratio of the specimen decreases slightly with the increase of effective confining pressure. The influence of cement admixture ratio on the damping ratio is small. With the increase of cement admixture ratio, the damping ratio of the sample increases slightly at the same strain level. The damping ratio is insensitive to the change of effective confining pressure and blending ratio as compared to the dynamic shear modulus.