硅酸盐通报2017，Vol.36Issue(5)：1728-1734,7.
负温条件下二灰改良风积砂土的动力参数试验研究
Experimental Study on Dynamic Parameters of Modified Aeolian Sand with Lime-Fly Ash at Negative Temperature
摘要
Abstract
In order to study the dynamic characteristics of modified aeolian sand under low temperature, the modified Hardin hyperbola model was used.And this paper was based on the dynamic triaxial test of frozen soil, the dynamic mechanical parameters of lime-fly ash aeolian sand with different experimental conditions under negative temperature were studied.The results show that the dynamic shear modulus of modified aeolian sand increases first and then decreases with the increase of the ash mixing ratio, and the improvement effect is best when the ash content is 30%-40%.Under the same mixing ratio, the dynamic shear modulus of frozen soil increases with the increase of confining pressure and frequency, and decreases with the increase of freezing and thawing cycles and temperature.The maximum dynamic shear modulus of the aeolian sandy soil under negative temperature was regressed by regression analysis.The linear equations of maximum dynamic shear modulus and confining pressure, frequency and temperature are obtained.The results can provide a scientific basis for solving practical engineering problems, and have certain social and economic benefits.关键词
二灰土/风积砂土/冻土动三轴/动剪切模量/冻融循环/动力分析Key words
lime-fly ash soil/aeolian sand/permafrost dynamic triaxial/dynamic shear modulus/freeze-thaw cycle/dynamic analysis分类
交通工程引用本文复制引用
张向东,扈晓飞..负温条件下二灰改良风积砂土的动力参数试验研究[J].硅酸盐通报,2017,36(5):1728-1734,7.基金项目
辽宁省公路科研项目(201502) （201502）
