摘要
通过对辽西地区风积土动三轴试验,研究了动荷载作用下辽西风积土的动强度特性和抗液化特性.通过控制不同的动荷幅值、固结比和固结围压等试验条件,获得了抗震设防烈度为7度时,辽西风积土的动应力值和抗液化剪应力比.利用Excel软件,对试验数据进行回归处理,得到了该土试样的动应力与固结比和固结围压两种因素的经验关系式.试验和回归分析结果表明,风积土的动应力与固结比和固结围压成正比.试验研究了不同固结比条件下辽西地区风积土的液化强度特性,获得了不同固结比条件下的抗液化剪应力比.试验结果表明,风积土的抗液化剪应力随着固结比的增加而增大.上述试验结果对于辽西地区工程的抗震设计具有重要的指导意义和工程实用价值.
Dynamic properties and liquefaction characteristics under dynamic loads of Aeolian soil in the west of Liaoning province were studied through dynamic triaxial tests.The dynamic strength of Aeolian soil was determined when the seismic fortification intensity is 7 degree under different test control conditions,including dynamic amplitudes,consolidation ratio and consolidation pressure.The empirical formulas relating dynamic strength to consolidation ratio and consolidation pressure were obtained by the regression analysis of the experimental data by using Excel.Tests and regression analysis results show that dynamic strength of Aeolian soil is proportional to the confining pressure and the consolidation ratio.The soils’ liquefaction strength was also studied.Liquefaction shear stress ratios under different consolidation ratios were obtained.Test results show that the liquefaction shear stress ratio is proportional to the consolidation ratio.The test results provide some practical guidance for the projects in west of Liaoning province
出处
《力学与实践》
CSCD
北大核心
2012年第3期48-52,47,共6页
Mechanics in Engineering
基金
国家自然科学基金项目(5097813)
辽宁省高等学校优秀人才支持计划项目(2008RC23)资助
关键词
风积土
动应力
抗液化剪应力
试验
aeolian soil； dynamic strength； liquefaction of shear stress； test
