某铁路路基变形沉降原因分析  

Investigation of a Railway Embankment Settlement

作　　者：薛双兵 XUE Shuangbing(Fuzhou Investigation Design and Research Institute Co.Ltd.,China Civil Engineering Construction Co.,Fuzhou 350001)

机构地区：[1]中土集团福州勘察设计研究院有限公司,福州350001

出　　处：《土工基础》2023年第2期193-196,共4页Soil Engineering and Foundation

摘　　要：以某铁路DK56+043~+150段路基工程沉降为背景,从地质岩土层条件、地下水位变化核查出发,通过对路堤本体各部位及地基本身进行沉降监测,分析了该段路基变形原因,研究了路基本体、地基下卧层引起的沉降变形与路基总体沉降量之间的关系,提出了控制路基沉降的工程措施建议。结论如下:该段路基填筑体和换填层均存在一定的压密变形;沉降变形主要原因是路基填筑体未完全压密,路堤本体存在一定的压缩变形,以及地基存在下卧层,目前尚未完全固结,尚存一部分固结沉降,根据水位监测和地基沉降速率对比分析,一部分沉降来自于地下水位下降引起的沉降。The settlement of a railway embankment between Station DK56+043 and+150 is presented in this paper.The railway embankments are monitored,and the data are analyzed by applying the subsurface soil and groundwater conditions so that the factors that triggered in the settlement are evaluated.The deformation of the embankment and the subgrade soils are correlated with the total settlement at the embankment so that the embankment settlement control measures are proposed.The following conclusions are obtained:the compactive deformation due to the self-weight the embankment and the subgrade fills are observed.Most of the settlements are due to the compaction deformation of the less compacted soil layers;there is a small portion of the settlement is due to the consolidation settlement.Based on the settlement rate of the monitored data and the groundwater level variations;the consolidation settlement is due to the lowering the groundwater level.

关 键 词：路基 分层沉降 监测 沉降分析 

分 类 号：TU433[建筑科学—岩土工程]