中文摘要：

研究目的：桥上无缝线路受力比较复杂，高速列车在桥上行车的安全性成为广泛关注的问题。为实时掌握线路的受力变形状态，构建高速铁路桥上无缝线路远程监测系统，并应用于京沪高速铁路京杭运河特大桥，对轨温、气温、轨道板温度及钢轨温度力的长期测试数据进行分析，揭示测试期内温度、钢轨温度力的变化规律。研究结论：（1）气温、轨温和板温随时间的变化一致，在一天内呈现先升后降的趋势；（2）测试期内，最高轨温较最高气温高11．06℃，最低轨温较最低气温低4．86℃；（3）随着板深的增加，日板温差随之减小，轨道板内部存在温度梯度；（4）各测点温度力随时间变化趋势基本一致，最大温度拉力出现在凌晨6时左右，最大温度压力出现在14时左右，轨温变化幅度越大，钢轨内部的温度力也越大，最大温度力为230．75kN；（5）系统性能稳定，数据采集、传输顺畅，可以满足高速铁路无缝线路长期、远程、实时监测的需要；（6）本研究成果对我国高速铁路无缝线路的远程监控具有参考价值。

英文摘要：

Research purposes： The force of the bridge CWR is very complex, therefore the safeties of high - speed train running on the bridge become a widespread concern issue. In order to acquire the force and deformation of the line in real time, a remote monitoring system for CWR on high - speed railway bridge is built and applied to the Beijing - Hangzhou Canal Bridge on Beijing -Shanghai high -speed railway, and a long -term testing dada on rail temperature, air temperature, track slab temperature and temperature force are analyzed, the change rules of temperature and rail temperature force during the test period are revealed. Research conclusions：（ 1 ） The air temperature, rail temperature and track temperature have the same change with time, and showing increased first and then decreased trend in one day. （2）The highest rail temperature is higher 11.06 ~C than the highest air temperature, and the lowest rail temperature is lower 4.86 ~C than the lowest temperature during the test period. （3）The slab temperature difference within one day decreases with the increasing depth of slab, and there is a temperature gradient inside the track slab. （4） The temperature force at each measuring point has a consistent trend over time, the maximum tension force induced by temperature occurred at about 6：00 a. m. , and the maximum compression force induced by temperature occurs around 2：00 p. m. The larger magnitude that rail temperature changes with, the greater temperature force inside the rail, and the maximum temperature force reaches 230.75 kN. （5） The system with stable performance, data collection and transmission is capable of meeting the needs of long - term, remote, real - time monitoring the CWR on high - speed railway. （6） The research results have reference value for the remote monitoring of high - speed railway CWR in our country.