多年冻土区无缝线路设计铺设及养护维修技术研究
Research on the technology of design, laying and maintenance forCWR in permafrost regions

开展多年冻土区无缝线路设计研究，为无缝线路铺设提供设计和理论依据；基于青藏铁路多年冻土区试验获得的气温、轨温变化规律，提出适合于多年冻土地区的无缝线路铺轨季节和最佳时间；基于多年冻土区无缝线路养护维修作业轨温条件的理论研究，提出需从严控制作业轨温条件的技术要求，建议多年冻土区无缝线路维修作业轨温应在实际锁定轨温加15 ℃减20 ℃范围内进行。
The design of CWR in permafrost zone was carried out, which provided theoretical basis for the laying of CWR. Based on the variation laws of temperature in permafrost zone, suitable laying season and time for CWR were proposed. The research on the maintenance temperature of CWR in permafrost zone shows that the maintenance temperature should be no more than actual stress-free temperature adding 15 ℃ and no less than it reducing 20 ℃