摘要
防脱护轨是高架地段关键的轨道安全附属设备,现有城市轨道交通用防脱护轨存在工程适应性较差,护轨质量较大、养护维修作业困难,工艺复杂、可靠性差等缺点,不利于城市轨道交通高架线路继续使用。结合现有防脱护轨使用经验,从安全性、结构强度、适应性、施工维修便宜性角度,优化设计出适用于60 kg/m钢轨的城市轨道交通线路用新型方钢型钢轨防护装置。经仿真分析验证,新型钢轨防护装置中间段和接头位置在不同车型横向力荷载作用下,结构良好,护轨主要结构未破坏;经室内横向推力试验验证,钢轨防护装置主体及接头位置在100 kN横向推力作用下未破坏;经300万次循环荷载疲劳试验,护轨结构未见松脱现象。本型方钢钢轨防护装置系统耐久性、稳定性、安全性和可靠性好,能满足城市轨道交通使用要求,可代替现有防脱护轨使用。
The anti-derailment guard rail is the key accessory equipment of track safety in elevated rail transit line.The existing anti-derailment guard rail for urban rail transit has some disadvantages,such as poor engineering adaptability,large quality,difficult maintenance,complex process and poor reliability,etc.,which are not conducive to the continued use of urban rail transit elevated lines.Therefore,it is necessary to study a new type of anti-derailment guard rail with better safety,versatility,construction convenience and economy.Combined with the existing experiences of anti-derailment guard rail,a new type of anti-derailment guard rail applicable to 60 kg/m rail in urban rail transit line is designed from the aspects of better safety,structural strength,engineering adaptability and maintainability.The simulation analysis shows that the middle part and joint part of the new anti-derailment guard rail are not damaged under different lateral force loads.The lateral thrust test shows that the middle part and joint position of anti-derailment guard rail are not damaged under the lateral thrust of 100 kN.The fatigue test with 3 million cyclic loads shows no looseness in the assembled anti-derailment guard rail.The new antiderailment guard rail has good durability,stability,safety and reliability,meets the requirements of urban rail transit,and can replace the existing anti-derailment guard rails.
作者
黄慧超
丁静波
HUANG Huichao;DING Jingbo(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)
出处
《铁道标准设计》
北大核心
2022年第3期6-12,共7页
Railway Standard Design
基金
中铁工程设计咨询集团有限公司科技研究计划课题(研2020-31)。
关键词
城市轨道交通
防脱护轨
强度检算
横推试验
疲劳试验
新型结构
urban rail transit
anti-derailment guard rail
strength checking
lateral thrust test
fatigue test
new structure
