长沙理工大学学报（自然科学版）2023，Vol.20Issue(6)：27-38,12.DOI:10.19951/j.cnki.1672-9331.20230420001
普速铁路加筋膨胀土路堤填筑与现场监测研究
Study on filling and field monitoring of reinforced expansive soil embankment of general speed railway
摘要
Abstract
[Purposes]The study aims to rational use of make expansive soil as embankment filler of general-speed railway,and verify the feasibility of using expansive soil dircetly in the non-dynamic area of embankment.[Methods]The road performance and swelling parameters of expansive soil were obtained through laboratory compaction and swelling tests,the vertical deformation of expansive soil embankment during operation was calculated based on the equilibrium moisture content theory,and the compaction control standard for expansive soil was put forward accordingly.Furthermore,a filling scheme of geogrid reinforcement treatment was proposed for preventing the shallow damage of the slope for the embankment slop,and the testing section buried with monitoring devices was built,the feasibility of the expansive soil filling scheme was verified through field monitoring.[Findings]When filling expansive soil,the compaction control moisture content should be taken as the wet side moisture content corresponding to 93%of the maximum dry density in its wet compaction curve.The geogrid reinforcement scheme can not only use the elastic deformation of the geogrid to release partial swelling pressure generated by the humidification of expansive soil,but also restrain the swelling deformation of expansive soil,thus ensuring the stability of the slope.After nearly one year's operation,the embankment settlement value is basically stable at about 37.0 mm,which meets the requirements of the specification.[Conclusions]This paper can provide a reference for expansive soil embankment filling of general-speed railway in expansive soil area,and promote the scientific and technological progress of railway industry.关键词
铁路工程/膨胀土路堤/土工格栅加筋/压实控制含水率/现场监测Key words
railway engineering/expansive soil embankment/geogrid reinforcement/compaction control moisture content/field monitoring分类
建筑与水利引用本文复制引用
刘妮娜..普速铁路加筋膨胀土路堤填筑与现场监测研究[J].长沙理工大学学报（自然科学版）,2023,20(6):27-38,12.基金项目
中国铁路南宁局集团有限公司科技研究开发计划项目(建21-4) Project(Building 21-4)supported by Science and Technology Research and Development Plan of China Railway Nanning Bureau Group Co.,Ltd. （建21-4）
