循环荷载下高填方风积沙路基变形规律研究  

Analysis on Deformation Law of High Fill Aeolian Sand Roadbed Under Cyclic Load

作　　者：刘明明 李绪森 郑天赞 LIU Mingming;LI Xusen;ZHENG Tianzan(Heilongjiang Longjian Road and Bridge Second Engineering Co.,Ltd.,Harbin 150006,China;School of Highway,Chang′an University,Xi′an 710061,China)

机构地区：[1]黑龙江省龙建路桥第二工程有限公司,哈尔滨150006 [2]长安大学公路学院,西安710061

出　　处：《交通科技》2023年第5期7-9,16,共4页Transportation Science & Technology

摘　　要：交通运输日益呈现高速化、重载化及大流量化的趋势,车辆传递给道路结构的循环荷载效应日益显著,明确循环荷载下高填方风积沙路基变形规律是其合理应用的关键。以新疆阿乌高速公路某标段为依托,通过分析现场监测站数据和室内动三轴试验,揭示在循环荷载下高填方风积沙路基的变形规律,对比分析现场观测站的路基沉降数据和室内试验结果,得出以下结论:高填方风积沙路基在施工完成后初期的压缩变形量很大,工后一段时间后沉降量较小且沉降变形逐渐趋于稳定。工后沉降量约为路基高度的0.3%;高填方风积沙路基的沉降量与其竖向填筑高度基本成正比。高填方风积沙路基沉降变形规律说明其工后沉降不会过大。To clarify the deformation law of high fill aeolian sand roadbed under cyclic load,based on a bid section of Urumuai-Altay Prefecture expressway in Xinjiang,the deformation law of high fill aeolian sand roadbed under cyclic load is studied.Through analyzing the roadbed settlement data of field observation station and indoor dynamic triaxial tests,the deformation law of high fill aeolian sand roadbed under cyclic load is revealed.Based on the comparative analysis of roadbed settlement data from on-site observation stations and indoor test results,it is concluded that the compression deformation of high fill aeolian sand roadbed is very large at the initial stage after construction,and the settlement is small and tends to be stable in a period of time after construction.The post-construction settlement is about 0.3%of the roadbed height.The settlement of the high fill aeolian sand roadbed is basically proportional to its vertical filling height.The settlement and deformation law of high fill aeolian sand roadbed shows that the post-construction settlement will not be too large.

关 键 词：高填方风积沙路基 循环荷载 沉降变形规律 

分 类 号：U416.166[交通运输工程—道路与铁道工程]