Section 3, South Line of the Hangzhou North Ring Road - Tianmushan Road Improvement and Renovation Project
Release time:
2025-12-24
Abstract
Construction unit: China Railway Seventh Bureau Group Co., Ltd.
Device Number: ("Qinlong No. 1" Tunnel Boring Machine) China Railway Equipment
Cutting disc diameter: 13.46 meters
Tunneling length: 3,490 meters
Project Features:
High difficulty in geological adaptation to the surrounding environment: The southern route is located in the central urban area and passes through a mixed geological formation comprising soft, silty soil and portions of hard bedrock. At the same time, it runs in close proximity to dense urban buildings. During construction, it must also be coordinated with the renovation of the Zhonghe Elevated Ring-North Interchange and the reconstruction and restoration of non-motorized vehicle bridges—tasks that place extremely high demands on construction accuracy and the protection of nearby facilities. Significant pressure from pipeline and traffic coordination: The section includes the construction of a 174-meter-long parallel ramp on the south side, and the surrounding area is densely packed with underground pipelines. During construction, it is necessary to simultaneously coordinate pipeline relocation and traffic diversion. This requires not only rerouting multiple power, communication, and other utility lines but also minimizing disruptions to the flow of traffic on major thoroughfares such as Tianmu Mountain Road and North Ring City Road, making traffic management particularly challenging.
Year of commencement: August 2020
Year of completion: August 2023
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