热带沙漠环境下,气温周而复始的变化会使钢轨内部产生巨大的温度应力。本文以沙特最长铁路—南北铁路为例,介绍横穿阿拉伯半岛第二大沙漠—纳夫得沙漠、炎热干旱气候变化无常等复杂环境的无缝铁路应力放散施工关键技术。 Tropical desert environment, the cycle of temperature changes will make the rail interior tremendous temperature stress. This paper takes the longest railway in the southeastern China as the example of South-North Railway, and introduces the key technologies for stress-relieving construction of seamless railway across complex environments such as the Nadu Desert, the second largest desert in the Arabian Peninsula, and the climate change in arid and arid climate.