江汉盆地淤泥质软土非线性动力特性  

Nonlinear Dynamic Characteristics of Muddy Soft Soilin the Jianghan Basin

作　　者：胡庆[1,2] 祁超 汤勇 HU Qing;QI Chao;TANG Yong(Hubei Key Laboratory of Earthquake Early Warning,Institute of Seismology,Wuhan 430071,China;Wuhan Institute of Earthquake Engineering Co Ltd,Wuhan 430071,China;Wuhan Junshan New City Fundamental Investment and Construction Co Ltd,Wuhan 430058,China)

机构地区：[1]中国地震局地震研究所地震预警湖北省重点实验室,武汉市430071 [2]武汉地震工程研究院有限公司,武汉市430071 [3]武汉军山新城基础投资建设有限公司,武汉市430058

出　　处：《大地测量与地球动力学》2025年第5期477-481,493,共6页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所和应急管理部国家自然灾害防治研究院基本科研业务费专项(IS202426356,IS202336346)。

摘　　要：为深入研究江汉盆地淤泥质软土层的动力特性,采用自振柱试验仪进行一系列不排水动力试验,分析该地区软土层动剪切模量比G/G_0、阻尼比λ随剪应变γ的变化特征。分别使用不同的动力本构模型拟合本地区淤泥质软土层G/G_0-γ曲线和λ-γ曲线,并分析最优拟合曲线。结果表明,江汉盆地软土的非线性特征表现出强烈的区域性,且与全国平均值存在明显差异。研究结果有利于加深对江汉盆地淤泥质软土层的动力特性认识,可在该地区软土层土动力参数实测数据不足时提供参考。In order to deeply study the dynamic characteristics of muddy soft soil layer in the Jianghan basin,we conduct a series of undrained dynamic tests using a self-vibrating column tester,and analyze the characteristics of dynamic shear modulus ratio G/G 0 and damping ratioλwith the change of shear strainγfor the soft soil samples in this area.Different dynamic constitutive models are used to fit the G/G 0-γandλ-γcurves of the muddy soft soil,and the optimal fitting curves are obtained.The results indicate that the nonlinear characteristics of soft soils in the Jianghan basin show strong regional features and are obviously different from the average level in China.The findings can provide more knowledge about dynamic characteristics of the muddy soft soils in this area,and can be used as a reference when the measured dynamic parameters of muddy soft soils are insufficient.

关 键 词：淤泥质软土 动剪切模量比 阻尼比 江汉盆地 动力试验 

分 类 号：P315[天文地球—地震学]