隧道内道床机械化清筛作业有害气体组成分布监测方法

Monitoring Method for Composition Distribution of Harmful Gases During Mechanized Ballast Cleaning Construction in Tunnels

针对采用柴油发动机为动力的既有工电检修装备在隧道内施工时尾气监测难题,选取典型的隧道内道床机械化清筛作业编组开展了测试。提出了以发动机附近定点检测为主,司机室和地面人员个体监测为辅的一体化有害气体监测方法,用于对隧道内的一氧化碳等致命性有害气体含量进行监测,超过安全标准值时发出声、光、电报警提示,以便及时采取应对措施。试验表明,该方法可以有效监测整个隧道机械化施工作业过程中重要点位的一氧化碳等有害气体的质量浓度变化,此外也能为发动机尾气净化装置、通风排烟排尘设施的研制提供技术支撑。

Addressing the challenge of monitoring exhaust emissions from existing railway track and signaling maintenance equipment powered by diesel engines during construction within tunnels,a comprehensive test was conducted on a typical mechanized ballast cleaning train.An integrated monitoring method was proposed,primarily relying on fixed-point detection near the engines,complemented by individual monitoring in the driver’s cab and among ground personnel.This method is designed to monitor levels of deadly harmful gases such as CO within tunnels,triggering audible,visual,and electrical alarms when exceeding safety thresholds,thereby enabling prompt response measures.Experimental results demonstrate that this approach can effectively monitor changes in the mass concentration of harmful gases like CO at critical points throughout the mechanized construction process in tunnels.Additionally,it provides technical support for the development of engine exhaust purification devices and ventilation,smoke,and dust exhaust facilities.