高速铁路无砟轨道路基上拱病害原因分析与处理

以某高速铁路路基上拱引发的无砟轨道轨面高程超标问题为例，从工程建设的勘察、设计、施工等角度分析研究，确定路基上拱的主要原因为填料中含有微量膨胀性物质，提出解决轨面超高问题的具体措施，同时指出建设标准与运营维护标准不匹配的现象，为建设规范的修订完善提供参考。

Cause Analysis and Treatment of Subgrade Camber Disease of Ballastless Track of High-speed Railway

Taking the problem of excessive rail surface elevation of ballastless track caused by subgrade camber of a high-speed railway as an example, this paper analyzes and studies from the perspective of survey, design and construction of engineering construction, the main reason of the subgrade camber are the trace expansive elements contained in subgrade filler. The specific measures to solve the problem of rail surface superelevation are put forward. And the mismatch between construction standards and operation and maintenance standards are pointed out, so as to provide reference for the revision and improvement of construction specifications.