京九铁路浰江大桥桥上无缝线路设计方案研究

Study on Continuously Welded Rail Design on Deck of Lijiang Bridge of Jing-Jiu Railway

提出了京九铁路浰江大桥桥上无缝线路设计方案,并基于MATLAB语言编制了桥上无缝线路纵向力计算软件。计算结果表明:浰江大桥桥上可不设钢轨伸缩调节器;锁定轨温取34±5℃时,桥上无缝线路强度、稳定性、断缝满足设计要求;桥墩纵向弯曲稳定性、墩身截面强度、合力偏心、墩顶纵向水平位移满足设计要求;桥墩基底应力、基底合力偏心、基础倾覆稳定性、基础滑动稳定性满足设计要求;桥台基底应力及偏心满足设计要求。

This paper puts forward the design scheme of continuously welded rails on the deck of Lijiang Bridge of the Beijing-Jiulong Railway. Based on the MATLAB Programming, the author writes the computing software of continuously welded rails on bridge. The results indicate that： expansion regulation is not needed on Lijiang Bridge. When locked rail temperature is 34 ±5℃, the strength, the stability and the breaking joint of CWR can satisfy the design requirements; The bridge pier longitudinal bending stability, the pillar body section intensity, the force bias and the pillar top longitudinal horizontal displacement satisfy the design requirements; The bridge pier base stress, the base force bias, the foundation tilt stability and the foundation glide stability satisfy the design requirements; The abutment base stress and the bias meet the design requirements.