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为研究固结程度对软土的动弹性模量的影响,对珠江海洋软土进行室内动三轴试验,并对试验结果进行拟合分析。试验结果表明:土体剪应变随着剪应力的增大而增大,随着频率和超固结比的增大而减小;采用Hardin双曲线模型对动剪应变-动剪应力曲线进行拟合,拟合度较高;动弹性模量随着频率和超固结比的增大而增大;通过对1/E_d-动应变幅值关系曲线进行分析,得出1/E_d关于频率和超固结比的动本构关系。
In order to study the influence of the degree of consolidation on the dynamic elastic modulus of soft soil, the marine dynamic triaxial test of the Pearl River is performed and the test results are fitted and analyzed. The experimental results show that the shear strain of soil increases with the increase of shear stress and decreases with the increase of frequency and overconsolidation ratio. The strain-shear stress curve of dynamic shear is simulated by Hardin hyperbola model And the fitting degree is high. The dynamic elastic modulus increases with the increase of frequency and overconsolidation ratio. By analyzing the curve of 1 / E_d-dynamic strain amplitude, we get 1 / E_d about the frequency and Dynamic Constitutive Relationship of Overconsolidation Ratio.