高原地区无缝道岔健康监测研究  

Research on the Health Monitoring of Welded Turnout in Plateau Area

作　　者：刘丹[1] 苏成光 张岷[2] 方家 刘超[2] 李志俊 LIU Dan;SU Chengguang;ZHANG Min;FANG Jia;LIU Chao;LI Zhijun(Chang'an University,Xi'an,Shaanxi 710064,China;China Railway First Survey and Design Institute Group Co.Ltd,Xi'an,Shaanxi 710043,China;Shanghai Tongxi Electronic Technology Co.Ltd,Shanghai 201600,China)

机构地区：[1]长安大学,西安710064 [2]中铁第一勘察设计院集团有限公司,西安710043 [3]上海同玺电子科技股份有限公司,上海201600

出　　处：《铁道工程学报》2024年第8期61-66,共6页Journal of Railway Engineering Society

基　　金：国家重点研发计划项目(2021YFB2601000);陕西省重点研发计划项目(2023-YBGY-334,2022SF-452);中铁第一勘察设计院集团有限公司科技开发计划项目(2022SF-452-PT01)。

摘　　要：研究目的:无缝道岔是无缝线路的关键技术之一,高原地区的气候复杂使其受力更为复杂,为保证列车的安全运营,有必要对其进行长期实时健康监测。本文针对高原地区无缝道岔构建实时健康监测系统,并对一组道岔进行为期2个月的在线监测,对监测期内的轨温、尖轨尖端位移及尖轨断轨进行相应分析。研究结论:(1)钢轨温度变化趋势与气温变化趋势相同,最高轨温始终高于日最高气温,平均差值为11.75℃,其出现时间总体来讲早于气温出现3 h左右;(2)最低轨温与气温值基本相同,其出现时间也基本相近,大致于早上7:00—8:00出现;(3)钢轨温度和大气温度之间存在较好的一次线性关系,当气温变化1℃时轨温变化约为1.5℃;(4)尖轨尖端的纵向位移变化趋势与气温和轨温变化趋势相同,与气温间呈一次线性关系;(5)本文研究可为高原地区无缝道岔的养护维修提供数据支撑。Research purposes:Welded turnouts are one of the key technologies for continuously welded rail,and the intricate climate in plateau areas complicates their stress state.In order to ensure the safe operation of trains,it is necessary to conduct long-term real-time health monitoring on them.This paper constructs a real-time health monitoring system for welded turnouts in plateau areas and conducts online monitoring on a group of turnouts for two months.The corresponding analysis is carried out on rail temperature,displacement of switch point,and fracture of switch blade during the monitoring period.Research conclusions:(1)The trend of rail temperature changes is consistent with that of air temperature changes.The highest rail temperature always exceeds the daily maximum air temperature,with an average difference of 11.75℃.Generally speaking,the occurrence time of rail temperature is about 3 hours earlier than that of air temperature.(2)The minimum rail temperature is typically concurrent with the air temperature,usually occurring between 7:00 to 8:00 in the morning.(3)There is a strong linear relationship between rail temperature and air temperature,with the rail temperature changing by approximately 1.5℃for every 1℃change in air temperature.(4)The trend of longitudinal displacement at the switch point is consistent with the temperature changes in both air and rail,showing a linear relationship with air temperature.(5)This research can provide data support for the maintenance and repair of welded turnout in plateau areas.

关 键 词：高原地区 无缝道岔 健康监测 轨温变化 

分 类 号：U212.3[交通运输工程—道路与铁道工程]