北京交通大学学报2024，Vol.48Issue(1)：66-73,8.DOI:10.11860/j.issn.1673-0291.20230002
插入道岔施工对运营高速道岔锁定轨温变化影响试验
Experiment on the impact of turnout inserting construction on the stress-free rail temperature of operating high-speed turnouts
摘要
Abstract
To investigate the impact of Turnout Inserting Construction (TIC) on the Stress-Free RailTemperature of Existing high-speed Turnout (SFRTET), a scheme to measure the change in SFRTET based on the bi-directional strain approach is proposed. The measurement principle of SFRTET changes caused by different factors is derived, and the data processing method for monitor-ing the change in SFRTET is determined. Field experimental research on the change of SFRTET is conducted. The results show that the difference between the rail installing-sensors temperature ob-tained from the SFRTET monitoring data and the directly measured data is only 1.4％, validating the rationality of the measuring principle and the correctness of the data processing method. The SFRTET of high-speed turnouts is influenced by each stage of TIC, exhibiting significant dynamic change characteristics during the stages of demolishing track structure, track structure construction, fine adjustment of turnout geometry, and integrated commissioning. This indicates that the SFRTET would undergo certain cyclic changes before reaching stability. The SFRTET of existing high-speed turnouts is most significantly affected by the re-welding of the branch rail, especially the branch rail near the welding position, with a temperature change of up to 12.87 °C. It is recommended that the rail welding construction should be carried out when the rail temperature is close to the original SFRTET.关键词
铁道工程/高速道岔/锁定轨温/运营铁路/测试原理Key words
railway engineering/high-speed turnout/stress-free rail temperature/operating railway/measuring principle分类
交通运输引用本文复制引用
谢铠泽,代玮武,李义强,杨观星,朱学伟..插入道岔施工对运营高速道岔锁定轨温变化影响试验[J].北京交通大学学报,2024,48(1):66-73,8.基金项目
国家自然科学基金(52008272,51978423) （52008272,51978423）
河北省自然科学基金(E2022210046,E2021210099) （E2022210046,E2021210099）
河北省省级科技计划(21317601D) （21317601D）
国能朔黄铁路发展有限责任公司技术开发项目(GJNY-20-230)National Natural Science Foundation of China(52008272,51978423) （GJNY-20-230）
Natural Science Foundation of Hebei Province(E2022210046,E2021210099) （E2022210046,E2021210099）
Project of Science and Technology Program of Hebei Province(21317601D) （21317601D）
Technology Devel⁃opment Project of Shuohuang Railway Development Co.,Ltd.(GJNY-20-230) （GJNY-20-230）
