Shenzhen Chunfeng Tunnel
Release time:
2025-12-24
Abstract
Construction unit: China Railway Tunnel Corporation
Device Number: ("Chunfeng" Tunnel Boring Machine) China Railway Equipment
Cutting disc diameter: 15.8 meters
Tunneling length: 3603 meters
Project Features:
With an excavation diameter of 15.8 meters—equivalent to the height of a five-story building—it was the largest-diameter slurry-balanced tunnel boring machine in China at the time. The tunnel’s exceptionally long distance of 3,603 meters made it a rare project of its kind in China, and its construction difficulty ranks among the highest in the world. The construction area is located in the core district of Shenzhen, where old buildings are densely packed along the route. The tunnel directly passes beneath 28 existing old buildings and runs alongside 78 other structures, most of which have shallow foundations with poor resistance to settlement. Furthermore, the tunnel must pass through 11 fault fracture zones, and the surrounding rock strength reaches as high as 173 megapascals. Additionally, the project involves continuous curves with small radii, while also needing to avoid sensitive areas such as subway lines and railway tracks, making the construction risk extremely high.
Year of commencement: December 2016 Moon
Year of completion: April 2024
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