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上海磁悬浮铁路是世界上第一条投入商业运营的磁悬浮铁路。它的建设过程中科技人员攻克了许多技术难关。其中,土木工程部分技术难度最大的就是预应力轨道梁的制作。由于磁悬浮轨道梁使用性能的特殊要求,其制作精度要求极高。施工过程中最为重要的就是预应力轨道粱制作过程中的先张——后张预应力的张拉控制。分析介绍了振弦式传感器的技术特点和振弦式锚索测力仪的开发、研制及应用情况。
Shanghai Maglev Railway is the world’s first commercial operation of maglev railway. In the process of its construction, scientific and technical personnel have overcome many technical difficulties. Among them, some of the most technically difficult civil engineering is prestressed orbital beam production. Due to the special requirements of the performance of maglev track beam, its precision is very high. The most important thing in the construction process is the tension control of pretensioned-post-tensioned prestress in the process of prestressed track beam. The technical characteristics of vibrating wire sensor and the development, development and application of vibrating wire rope dynamometer are analyzed and introduced.