Expansion of the Northern Section of the Western Passage (North-South Line) Project for the Hangzhou-Jiaxing-Huzhou South Drainage System.
Release time:
2025-12-24
Abstract
Construction unit: China Water Resources and Hydropower Fifth Engineering Bureau Co., Ltd.
Device Number: ("Xianxinghao" Tunnel Boring Machine) China Railway Equipment
Cutting disc diameter: 12.10 meters
Tunneling length: 5080 meters
Project Features:
A benchmark project in China’s deep tunnel drainage sector: As the country’s first-ever deep-tunnel drainage project, the northern section is one of the largest and most technically challenging segments in China’s drainage engineering field. The tunnel is buried 55 meters underground, requiring breakthroughs in several industry “bottleneck” challenges, including the construction of ultra-deep excavation support systems and the design of deeply buried tunnel lining structures. The construction environment and technical requirements are exceptionally stringent: the tunnel passes through ecologically sensitive areas such as the third phase of Xixi Wetland, placing extremely high demands on controlling construction-induced disturbances. To meet these rigorous standards, the construction team employed advanced technologies such as three-dimensional modeling simulations and ground-bearing capacity reinforcement, enabling millimeter-level precision in the installation of the shield machine’s core components. At the same time, a digital smart management platform provides round-the-clock monitoring of construction progress, ensuring both construction quality and ecological safety. With an ecological water allocation capacity exceeding 25 cubic meters per second, this project will effectively improve the aquatic ecosystem of the river network in the western part of the city.
Year of commencement: November 2023
Year of completion: March 2027
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