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通过深入分析苏州第四纪土的海相、陆相沉积环境及土层分布特征,对苏州第四纪土311个原状土样进行了土的动剪切模量比和阻尼比试验研究,结果发现:海侵作用和土层深度对苏州第四纪各类土的动剪切模量比、阻尼比与剪应变幅值关系曲线的影响有明显差异,深度0~30 m的海相黏土动剪切模量比和阻尼比曲线分别低于和高于陆相黏土的曲线,深度30~100 m的海相黏土动剪切模量比和阻尼比曲线分别高于和低于陆相黏土的曲线;土层深度对海相黏土、粉质黏土和海、陆相粉细砂的动剪切模量比曲线以及对海相黏土、粉质黏土和陆相粉细砂的阻尼比曲线的影响较为明显;对黏土、粉质黏土、粉土、粉细砂按土层深度0~30 m和30~100 m以及淤泥质土、中粗砂不区分土层深度,给出了苏州第四纪各类土的动剪切模量比和阻尼比曲线经验关系的拟合参数值及其平均关系曲线推荐值。
Through the in-depth analysis of the marine facies, terrestrial sedimentary environment and the distribution of soil layers in the Quaternary soils of Suzhou, the dynamic shear modulus ratio and damping ratio of the soils in Quaternary of Suzhou were investigated. Results It is found that the effects of transgression and depth of soil on the dynamic shear modulus ratio and the relationship between the damping ratio and shear strain amplitude of Quaternary sediments are obviously different. The shear modulus ratio and damping ratio curve are lower and higher than that of continental clay respectively. The dynamic shear modulus ratio and damping ratio curve of marine clay with depth of 30 ~ 100 m are higher and lower than those of continental clay Curve; the effect of soil depth on the dynamic shear modulus ratio curve of marine clay, silty clay, marine and terrestrial fine sand and its influence on the damping ratio curve of marine clay, silty clay and terrestrial silty sand It is obvious that clay, silty clay, silt and silty sand do not distinguish the depth of soil from 0 to 30 m and 30 to 100 m as well as muddy soil and medium coarse sand, Fitting Parameter Values and Their Mean Relationship of Experience Relationship of Dynamic Shear Modulus Ratio and Damping Ratio Curves of Various Soils Line recommendations.