地铁整体道床脱空破损机理及结构补强措施

随着我国地铁运营里程的增多,其线路的整体道床脱空破损的问题也日渐突出。为更好地指导道床脱空破损的整治,通过理论假定,建立道床受力模型,并对其进行破损模型验证分析。提出临界脱空面,通过对临界脱空面渗水至浸水过程来探讨分析道床脱空破损的机理。对于具体的道床破损整治工程,基于理论分析的结果,采用环氧补强加固方法。经过三年运营期的跟踪与反馈,表明此破损机理的分析与采用的施工工艺是符合实际情况的。

Mechanism of Subway Monolithic Track Bed Void and Damage and the Structural Reinforcement

With the increase of subway operation mileage in China,the monolithic track bed void and damage problems are becoming serious.In order to effectively guide the rectification of track bed damages,a stress model of the ballast bed is established based on theoretical hypotheses,which is verified and analyzed through a damage model.On this basis,the water seepage and immersion process on critical hollow surface is discussed,the mechanism of the bed damage is analyzed.For the specific track bed damage remediation project,based on the results of theoretical analysis,the epoxy reinforcement method is adopted.After three years of operation tracking and feedback,the analysis of the damage mechanism and the construction process adopted prove to be in line with the actual situation.