胶新铁路软弱土路基实测沉降与预测分析

Measured Settlement and Prediction Analysis of Jiaozhou-Xinyi Railway Soft Subgrade

基于胶新铁路路基沉降监测和预测研究,分析了试验段软弱土路基的实测沉降及其变化规律,并对各断面在通车前后的累积沉降进行对比,研究发现:在路堤自重作用下,路堤各部分土体均表现为沉降变形;线路上碴和铺轨阶段沉降较大;正式通车3个月后,路基在自重和列车动荷载作用下,沉降较大;选用不同的预测方法拟合同一工程的不同阶段,能得到更确切的沉降信息,使之服务于工程需要。

Based on subgrade settlement monitoring and prediction of Jiaozhou-Xinyi Railway,this paper analyzed the measured settlement and change law of soft subgrade in test section,and compared the accumulative settlement of different sections before and after opening to traffic.It is found that under the gravity of embankment,various parts of soil mass are deformed.Settlement is larger when filling ballast and laying track.Three months after opening to traffic,subgrade settlement is larger under gravity and dynamic train load.More precise settlement information can be obtained by fitting of different parts in the same project using different prediction methods to satisfy engineering needs.