营口地区软土流变模型参数及流变特性研究

The Study on the Parameters of Rheological Models and Rheological Properties of Soft Soils in Yingkou District

根据辽宁营口地区淤泥质粉质粘土的流变试验,对流变模型参数及流变特性的变化规律进行探讨.研究表明:运用模型理论建立的流变模型的线性粘弹性参数在低应力水平下是惟一的,但非线性粘弹性参数不惟一,并随应力水平的变化而变化,而粘塑性参数的大小决定了应力应变等时曲线的形状.此外,流变模型的参数随试验条件的不同而变化.基于营口地区淤泥质粉质粘土的粘弹性及粘塑性流变特性,指出二者随时间和应力水平的变化表现出不同的流变特性.

Combining the data of the rheological test of silt-like soft soils in Yingkou district,this article inquired the law of model parameters and rheological properties.The study demonstrated that linear visco-elastic parameters of rheological models built by theoretical modeling methods were constant while nonlinear visco-elastic parameters were not constant and changed as stress level changed and that visco-plastic parameters determined the shape of stress-strain curve.In addition,rheological properties changed as test conditions changed.According to the analyses of the visco-elastic and visco-plastic rheological properties of grey silt-like soft soils in Yingkou district,the author interpreted that they show different rheological properties as time and stress level changed.