高铁路基工程变形观测方案设计与实施

Design and Implementation of High-Speed Rail Roadbed Deformation Observation Schemes

高速铁路要为列车的高速行驶提供一个高平顺性和高稳定性的轨下基础,而路基作为轨道结构的基础,必须在运营条件下将线路轨道的设计参数保持在要求的标准范围之内,这无疑就对高速铁路的沉降稳定提出了很高的要求。然而,长期以来"桥头跳车"现象一直困绕着人们,究其原因是路桥过渡段的刚性和柔性的差异沉降所致。本文以哈大高铁四平段为例,对路基和过渡段的沉降稳定性以及沉降进行了预测。

The high-speed railroad must provide a high smoothness and high stability foundation under the axle for train's high speed travel,while the roadbed takes the foundation of the track structure.We must keep the design of parameter into demanded range under our operation condition,which raises much higher request for the settlement of high-speed railway.However,the phenomenon-'vehicles bumping in the end of bridge' has been a tough concern for a long time,which directly influences the safety and comfortbility during train operation.The main reason lies in the deference between the rigidity and flexibility in the transition section.Therefore,the key task is the road base,the settlement in the transition section as well as the settlement anticipation for high-speed base design and construction.