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Xiaoshan Project of the Hangzhou–Changsha Section of the Shanghai–Kunming High-Speed Railway
At the Xiaoshan section of the Hangzhou–Changsha High-Speed Railway in Zhejiang Province, undertaken by China Railway 17th Bureau, Xinfada was assigned the tasks of girder lifting, girder transportation, and girder erection. The project presented significant challenges, including the need to erect the entire bridge structure through a tunnel, transport girders through the tunnel, and perform girder erection both at the tunnel entrance and exit—complex construction operations all requiring innovative solutions. Through equipment modifications and the development of novel construction methods, our company’s technical and construction teams successfully addressed the then-undeveloped low-level girder transportation technology and tunnel-entry/exit erection techniques, thereby ensuring the smooth completion of the project.
The Zhejiang section of the Hangzhou–Changsha Passenger Railway Line spans 294 kilometers and forms part of the Shanghai–Kunming Passenger Railway, which is a key component of China’s “Four Vertical and Four Horizontal” passenger rail network, with a design speed of 350 kilometers per hour.
Project characteristics: The Xiaoshan section features a large number of tunnels—13 in total—and many of them are connected to bridges, resulting in minimal girder-spacing requirements of 13 meters at tunnel portals and 8.5 meters at tunnel exits. Consequently, girder-erection work at tunnel portals presents significant technical challenges.
Keywords:
Tunnel portal construction, low-position girder transporter, Shanghai–Kunming High-Speed Railway
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