地铁非授权列车从段/场进入正线的故障树风险分析

分别在道岔未设置自动回转功能和设置自动回转功能的场景下,对非授权列车从段/场进入正线概率和脱轨概率进行故障树建模,根据对比分析得出:从段/场进入正线的道岔在不设置自动回转功能而采用反位报警功能时,不仅可以避免频繁操作道岔,而且在安全性和可用性方面优于采用道岔自动回转功能。因此,建议从段/场进入正线的道岔设置反位报警功能。目前该功能在杭州地铁5号线段/场工程中应用效果良好。

Fault tree risk analysis of unauthorized train entering main line from depot/yard

In the situation that the turnout is or not equipped with automatic turning function,the fault tree modeling is carried out for the probability of the unauthorized train entering the main line tracks from the depot/yard and derailment probability.Based on the comparative analysis,when the turnout for train entering the main line tracks from the depot/yard is not set the automatic turning function but adopts the reverse position alarm function,it not only avoids frequent operation of the turnout,but also is safe in terms of availability and accessibility,it is superior to the automatic turning function of turnout.Therefore,it is suggested that the turnout for train entering the main line from the depot/yard should be provided with the turnout reverse position alarm function.At present,this function has a good application effect in Hangzhou metro line 5 depot/yard project.