四川盆地某车站路基上拱原因分析及变形趋势预测  

Cause Analysis and Deformation Trend Prediction of Subgrade Upwarp of a Railway Station in Sichuan Basin

作　　者：郑维 陈明浩[1] 陈兴海[1] ZHENG Wei;CHEN Minghao;CHEN Xinghai(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2025年第2期46-50,56,共6页High Speed Railway Technology

基　　金：中国国家铁路集团有限公司重大课题(K2019G045)。

摘　　要：四川盆地红层区高速铁路路基上拱变形已成为高速铁路建设面临的难题。以四川盆地某客运专线铁路车站上拱路基为研究对象,在既有研究成果的基础上,通过地质调绘、地质钻探、地应力测试、室内试验等方法,分析车站路基上拱的原因,并对典型变形段上拱变形趋势进行预测。结果表明,(1)车站路基持续上拱的内因为红层泥岩在低应力作用下的蠕变性,外因为场地内存在的水平构造应力;(2)预测车站典型变形段(K 53+073~K 53+293)持续变形至2041年趋于稳定,最终上拱变形量为41 mm,目前已累计上拱24.8 mm,剩余变形量约为16 mm。研究成果可为车站路基上拱病害整治工程设计提供依据。The upwarp deformation of subgrade of high-speed railway in red layer area of Sichuan Basin has emerged as a challenge in high-speed railway construction.Taking the subgrade upwarp of a passenger dedicated railway station in Sichuan Basin as the research object,based on the existing research results,the causes of subgrade upwarp of the station were analyzed by means of geological mapping,geological drilling,in-situ stress test and indoor test.On this basis,the upwarp trend of typical deformation section was predicted.The results show that:(1)The internal cause of the continuous upwarping of the station subgrade is the creep of red mudstone under low stress,while the external cause is the horizontal tectonic stress in the site.(2)It is predicted that the typical deformation section(K 53+073~K 53+293)of the station will be stable until 2041,with a final upwarp deformation of 41 mm,the cumulative upwarp now is 24.8 mm,and the remaining deformation is about 16 mm.The research findings can provide a basis for the design of the upwarp disease treatment project of the station.

关 键 词：四川盆地 无砟轨道 路基上拱 变形趋势预测 

分 类 号：U216.41[交通运输工程—道路与铁道工程] U213.1