高速铁路异物侵限监测网设置范围计算公式的完善

高速铁路异物侵限监测系统是高速铁路重要的基础设施,其监测网的安装范围正确与否将直接关系到高速铁路的运输安全,原铁道部运输局2010年颁布的《高速铁路防灾安全监控系统-公跨铁立交桥异物侵限监测方案》提供了公跨铁立交桥异物侵限监测电网设置范围的计算公式。通过举例分析发现,当公跨铁立交桥与铁路线的夹角大于70°时,该计算公式得出的计算结果偏小,甚至还会出现负值的不合理现象,对高速铁路运营安全产生不利影响,因此有必要对该计算公式进行修改完善。根据公跨铁立交桥与铁路线的夹角大小分(0,70°)、70°,90°)、90°,180°)三个区间进行讨论,并利用三角函数法,研究得出一整套新的计算公式。研究成果表明,用新的计算公式得出的公跨铁立交桥异物侵限监测电网设置范围更加科学合理,提高了高速铁路异物侵限监测系统的安全监控性能。

The Improvement of the Setting Range Calculation Formula for Foreign Object Invasion Monitoring Network of High Speed Railway

The foreign object invasion monitoring system is an important infrastructure of high speed railway. Whether the monitoring net setting range is correct relates directly to the transportation safety of high speed railway. The setting range calculation formula for power grid foreign object invasion monitoring network for highway interchange over crossing railway is suggested in Disaster Prevention and Safety Monitoring System of High Speed Railway——Scheme of Foreign Object Invasion Monitoring on Highway Interchange Crossing Railway issued by the former MOR Transport Bureau in 2010. Case analysis indicates that the calculation value is smaller,while the intersection angle between the railway and the highway bridge is greater than 70 degree,and the value can even be irrationally negative,which imposes detrimental effect on the safety of high speed railway operation. Thus,it is necessary to modify and improve the calculation formula. This article discusses three scopes of the intersection angle between the railway and the highway crossing bridge( 0,70°),70°,90°),90°,180°),utilizes trigonometric function and forms a new set of calculation formula. Research results show that the setting range of power grid monitoring network calculated according to the new calculation formula is more scientific and reasonable and can improve the safety performance of foreign object invasion monitoring system of high speed railway.