长沙磁浮东延线接入 T3 航站楼工程是国内首个磁浮盾构隧道工程，也是目前世界最长磁浮隧道工程。为 科学、合理制定隧道工程断面尺寸，保障磁浮列车安全平稳运行，对长沙磁浮东延线接入 T3 航站楼工程限界进 行了深入研究。参照《地铁限界标准》，结合磁浮车辆结构特点，对车辆限界、设备限界以及盾构区间建筑限界、 明挖区间建筑限界、地下车站建筑限界等几种典型建筑限界进行了研究，并给出详尽的典型地段建筑限界图。研 究表明：采用盾构内径为 6.1 m 的隧道能够满足隧道阻塞比及磁浮列车安全平稳运行要求，并具有一定的经济性。 长沙磁浮东延线接入 T3 航站楼工程已开工建设，建筑限界设计安全、经济、合理，可为后续磁浮隧道工程建设 提供参考。

The Changsha Maglev East Extension Line connected to the T3 terminal is the first maglev shield tunnel in China and the longest maglev tunnel in the world. To scientifically formulate the section size of the tunnel project and ensure the safe and stable operation of the maglev train, a comprehensive study was conducted on the gauge of the Changsha Maglev East Extension Line connected to the T3 terminal. Referring to the Standards of metro gauges and considering the structural characteristics of maglev vehicles, several typical building gauges of vehicles, equipment, shield tunnel construction, open cut construction s, and underground station construction have been studied. Detailed structure gauge charts of typical sections are presented. The results indicate that the use of a shield tunnel with an inner diameter of 6.1m can meet the train-tunnel dimension ratio and the safe and stable operation of maglev trains and is efficient. The Changsha Maglev East Extension Line connected to the T3 terminal project has been under construction, and the design of the building gauge is safe, economical, and appropriate, which provides a reference for the subsequent construction of the maglev tunnel project.

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湖南省高新技术产业科技创新引领计划项目(2022GK4033)；湖南省交通运输厅科技进步与创新计划项目(202014)