Abstract: In order to clarify the internal faults of the bridge-tunnel interface system in railway engineering, a fault analysis method of the bridge-tunnel interface system in railway engineering based on the brittleness connection entropy was proposed.According to the degree of mutual influence between interfaces, the brittleness connection entropy was used to complete the quantification of the brittleness connection within the interface system.The dynamic fault situation of multiple interfaces was analyzed by constructing interface brittleness units, and the fault evolution direction of the interface system was determined by the entropy increase of interface.The above process reflected the game behavior of the interface in the dynamic fault.The interfaces affected by the fault were mapped as the participants in the game, and a non-cooperative game fault analysis model for railway engineering bridge-tunnel interfaces was established.Taking the actual project as the application case, the simulation results show that there is a chain of fault propagation within the railroad engineering bridge-tunnel interface system, and only 64% of the engineering interface maintenance within the railroad work area needs to be completed when periodic maintenance is carried out every 6 units of time, which can ensure the normal operation status of the railroad engineering bridge-tunnel section.Through interface fault analysis and research, the process of interface fault development has been clarified, providing theoretical support for improving the safety and reliability of railway engineering bridge-tunnel interfaces.

Key words: highway and railway engineering; brittleness connection entropy; non-cooperative game; fault analysis

摘要： 为明确铁路工程桥隧接口系统内部的故障情况，提出一种基于脆性联系熵的铁路工程桥隧接口故障分析方法。依据接口间的相互影响程度，利用脆性联系熵，完成接口系统内部脆性联系的量化；通过构建接口脆性基元分析多接口的动态故障情况，接口的熵增决定接口系统的故障演化方向，这一过程体现了接口在动态故障中的博弈行为；将受故障影响的接口映射为博弈中的参与者，建立铁路工程桥隧接口非合作博弈故障分析模型；以实际工程为应用案例，仿真结果表明：铁路工程桥隧接口系统内部存在连锁性的故障传播情况，在以每6单位时间为周期进行周期性维修时，只需要完成铁路工区内64%的工程接口检修，便可保证铁路工程桥隧段的正常运营状态；通过接口故障分析研究，明确了接口故障发展的过程，为提高铁路工程桥隧接口的安全性和可靠性提供理论支撑。

关键词: 道路与铁道工程；脆性联系熵；非合作博弈；故障分析