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通过对长江下游地区南京、苏州、常州、徐州、泰州、盐城、扬州、无锡、镇江、张家港、连云港、启东、常熟、江阴、宿迁等15个城市的淤泥质粉质粘土、粘土、粉质粘土、粉质粘土与粉砂互层土、粉土、粉细砂和粗砂等七类新近沉积土共计275个原装土样历时3年的自振柱试验研究,给出了长江下游地区七类新近沉积土的动剪切模量比 G/Gmax和阻尼比λ与剪应变幅值γ变化的平均曲线的拟合曲线、包络线及其参数的推荐值。由于未见报道其他研究者对长江下游地区新近沉积土动力参数的系统研究,该研究成果有利于加深对该长江下游地区各类新近沉积土动力特性的认识,并对该地区各类工程建设的工程场地地震安全性评价工作具有一定的借鉴和参考价值,且有利于推动长江下游地区工程场地地震安全性评价工作的开展。
Through analyzing the silty silty clay, clay and silty clay in 15 cities such as Nanjing, Suzhou, Changzhou, Xuzhou, Taizhou, Yancheng, Yangzhou, Wuxi, Zhenjiang, Zhangjiagang, Lianyungang, Qidong, Changshu, Jiangyin and Suqian in the lower reaches of the Yangtze River, , Seven newly deposited soils of silty clay and silt interbedded soil, silt, silty sand and grit, totaling 275 original self-oscillating columns with 3 years of original soil test were studied. The fitted curve of the dynamic shear modulus ratio G / Gmax and the average curve of the damping ratio λ and the shear strain amplitude γ of newly deposited soils, the recommended values of the envelope and its parameters. Since no other researchers have reported on the systematic study of the dynamic parameters of newly deposited soils in the lower reaches of the Yangtze River, the research results are helpful to deepen the understanding of the dynamic characteristics of newly deposited soils in the lower reaches of the Yangtze River, Engineering site seismic safety evaluation has some reference and reference value, and is conducive to promoting the safety of the project site in the lower reaches of the Yangtze River seismic safety evaluation.