Huzhou Nanxun Tunnel
Release time:
2025-12-24
Abstract
Construction unit: Hongrun Construction Group Co., Ltd.
Device Number: ("Hongrun No. 36" Tunnel Boring Machine) Hongrun Construction Group
Cutting disc diameter: 11.70 meters
Tunneling length: 1200 meters
Project Features:
Multiple sensitive areas are traversed, requiring stringent protection measures: The tunnel boring machine must sequentially pass beneath National Highway 318, the Changhu-Shen Class III waterway, the historic Qitang Canal Heritage Area, and the World Cultural Heritage Site of Nanxun Ancient Town. During construction, settlement and vibration must be strictly controlled. At the same time, an intelligent monitoring and early-warning system called “Quan Zhi Yun” is relied upon to conduct real-time monitoring of both the tunnel structure and its surrounding environment, ensuring the safety of cultural relics and scenic-area buildings. The geological conditions and construction techniques present significant challenges: The tunnel passes through predominantly silty clay, silty clayey soils, and粉土, with overburden thickness ranging from only 6.2 to 17.9 meters. This poses technical difficulties such as launching and receiving in extremely shallow overburden and tunneling along tight-radius curves. To address these challenges, the project employs a 11.7-meter-diameter slurry shield tunneling machine. By dynamically adjusting tunneling parameters and precisely calculating cutterhead pressure, the project has successfully resolved stability issues associated with long-distance tunneling in soft ground conditions.
Year of commencement: September 2020
Year of completion: January 2023
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