北京至天津城际铁路(简称“京津城际铁路”)是我国第一条建成并投入运行的高速铁路客运专线。京津城际铁路起于北京南站,经北京崇文、丰台、朝阳、通州四区,天津武清、北辰、河北、河东四区,止于天津站,线路全长116.6千米;铁路路基基本由高架特大桥组成(桥梁占总长的86%)、道床基本为轨 Beijing to Tianjin Intercity Railway (“Beijing-Tianjin Intercity Railway” for short) is the first high-speed railway dedicated passenger line built and put into operation in China. The Beijing-Tianjin inter-city railway starts at Beijing South Railway Station and ends at Tianjin Station via Beijing Chongwen, Fengtai, Chaoyang and Tongzhou four districts, Tianjin Wuqing, Beichen, Hebei and Hedong districts. The total length of the railway is 116.6 kilometers; By the elevated bridge (the bridge accounts for 86% of the total length), the basic road bed for the track