New Zhengzhou Airport-Zhengzhou South Station Intercity Railway Tunnel
Release time:
2025-12-24
Abstract
Construction unit: China Railway 16th Bureau Group Co., Ltd.
Device Number: ("Zhongyuan No. 1" Tunnel Boring Machine) China Railway Construction Heavy Industry
Cutting disc diameter: 12.81 meters
Tunneling length: 3,800 meters
Project Features:
The project boasts numerous technological innovation highlights—it is China’s first intercity railway tunnel project featuring a dual-track, large-diameter shield tunnel. The tunneling machine has been equipped with a world-first six-axis underwater special-operation robot, which can effectively clean the cutterhead and solve the challenging problem of mud cake buildup. The tunnel passes through highly risky critical infrastructure, including a close-range underpass beneath the main canal of the South-to-North Water Diversion Project’s central route. At this section, the tunnel’s arch crown is buried only 26 meters above the canal’s bottom, where the water pressure is 40 times higher than normal during tunneling. Moreover, the settlement must be kept within a strict limit of no more than 9 millimeters. To achieve this, the project team conducted trial sections and introduced advanced automated monitoring technologies, ultimately controlling the settlement in the underpass section to within 2.5 millimeters—a remarkable feat that ensured safe passage. The tunneling efficiency has reached unprecedented levels: the daily advance rate has been increased from an average of 3 rings per day to 7 rings per day, setting new national records for intercity railway tunnels, including a single-day advance of 22 meters, a monthly advance of 410 meters, and a one-time safe advance of 3,800 meters using large-diameter dual-track shield tunneling technology.
Year of commencement: January 2017
Year of completion: November 2018
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