【摘要】 依托实际工程,利用FLAC计算程序,分别基于库伦模型和Byrne模型对地震荷载作用下公路跑道粉砂土路基的地震响应进行了分析,详细分析了地震强度对粉砂土路基地震响应的影响.研究结果表明:当只考虑路堤下粉土为库伦模型时,路基不会出现液化,但是路基坡脚处可能出现瞬时屈服.当考虑路堤材料为液化模型时,路面有可能处于受拉状态,路堤底部有可能屈服,路基土有可能产生液化.随着加速度峰值的增加,路堤内拉力区和屈服区的范围增大,液化出现的可能性也增大,尤其当地震加速度达到0.1g时,路基土存在液化的可能性.更多还原

【Abstract】 In this paper,seismic response of highway runway silt subgrade is analyzed under seismic loads respectively based on the coulomb’s model and Byrne model with FLAC calculation program based on the practical project.And the influence of seismic intensity on silty soil subgrade seismic response is analyzed in detail.The results show: the roadbed will not be liquefied,when only considering silty soil for the coulomb’s model,but instantaneous yield may appear at subgrade slope feet.When we consider embankment material for liquefaction model,the pavement may be in a state of tension,embankment bottom may yield,and this may produce subgrade soil liquefaction.Along with the increase of the acceleration peak,the extent of the tension and yield area increases inside the embankment,the likelihood of liquefaction increases,especially when the earthquake acceleration reaches to 0.1 g,the potential existence of liquefaction of subgrade soil might appear.更多还原