摘要
由于受到黄土山区地形地貌条件的制约,在黄土山区修筑高速公路时经常会遇到非对称路堤问题,而非对称路堤极易引起各类路基路面病害.基于有限元分析软件,建立了非对称路堤数值模型,对比分析了未加筋、格栅加筋和EPS加筋3种工况下非对称路堤受力和变形特性.最后,针对运煤通道交通荷载特点,着重探讨了非对称交通荷载作用下3种工况下路堤的工作特性.研究结果表明:路堤施工过程中,EPS加筋技术处治效果要优于格栅加筋;但交通荷载作用下格栅加筋工况下路堤沉降、侧向变形明显小于EPS加筋工况,非对称路堤处治时宜采用格栅加筋技术.
Restricted by the complicated geographic and geomorphic conditions, the asymmetric embankments often encounter in loess mountain region and can easily cause many distresses of pavement and subgrade. In this study, the numerical model of asymmetric embankment is established based on a finite element analysis software. The mechanical ＇and deformation characteristics of three cases, i.e. unreinforced embankment, geogrid reinforced embankment and expandable polystyrene （EPS） reinforced embankment, are analyzed comparatively. Finally, the performance characteristics of three cases under asymmetric traffic loads are studied emphatically. The results show that the treatment effect in EPS reinforced case is better than that in geogrid reinforced case in the construction process. However, the settlement and lateral displacement caused by traffic load in geogrid reinforced embankment is smaller than that in EPS reinforced embankment. Therefore, the geogrid is more suitable to reinforce asymmetric embankment.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2017年第3期422-428,共7页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:51608316)
交通建设科技项目(编号:2014318771100)
山西省交通厅科技项目(编号:2014-1-2)
关键词
非对称路堤
土工格栅
EPS
受力特性
黄土山区
asymmetric embankment
geogrid
EPS
mechanical characteristics
loess mountain region
