硅酸盐通报2017，Vol.36Issue(11)：3607-3612,6.
铁尾矿粉改良水泥土的强度与动力特性试验研究
Experimental Study on Strength and Dynamic Characteristics of Cement Soil Modified with Iron Tailings Powder
摘要
Abstract
In order to improve the strength of cement stabilized soil and verify the effect of tailing powder on strengthening of cement soil,subgrade soil improved with cement,under the condition of different amount of tailings powder,strength characteristics of cement soil after improvement,and the best amount of tailings powder after the improvement of cement soil, experimental investigation on dynamic characteristics under different confining pressure and frequency is carried out,the test soil samples with different tailings content (0%,2%,4%,6%,8%,10%)were prepared. Test results show that:With the increase of the amount of tailings powder,unconfined compressive strength increases first,then decreases. Stress-strain curve of soil increases sharply first,then gradually flatten when peak value is reached. When the amount of tailing powder is optimum,dynamic three axis test the relationship between dynamic shear modulus ratio,damping ratio and dynamic shear strain amplitude under different confining pressure and frequency is analyzed. For the same moving shear strain amplitude,the dynamic shear modulus ratio increases with increasing confining pressure. The damping ratio increases with the increase of the shear strain amplitude, which decreases with the increase of the confining pressure. The relationship between the shear modulus ratio,the damping ratio and the moving shear strain amplitude isless sensitive to the frequency,and is concentrated in a narrow range. The optimum dosage of tailing powder which can increase the strength of cement soil is 6%.关键词
水泥土/尾矿粉/动剪模量/阻尼比Key words
cement soil/tailings powder/dynamic shear modulus/damping ratio分类
建筑与水利引用本文复制引用
张彬,宫照伟..铁尾矿粉改良水泥土的强度与动力特性试验研究[J].硅酸盐通报,2017,36(11):3607-3612,6.基金项目
国家安监总局项目(0505079) （0505079）
辽宁省教育厅项目(1.2011048) （1.2011048）
