Hangzhou Xiangji Temple Road West Extension Project
Release time:
2025-12-24
Abstract
Construction unit: China Railway Tunnel Bureau Group Co., Ltd.
Device Number: ("Canal Pioneer" Tunnel Boring Machine) China Railway Equipment
Cutting disc diameter: 11.65 meters
Tunneling length: 880 meters
Project Features:
High ecological and cultural preservation requirements: The tunnel passes beneath the World Heritage site section of the Beijing-Hangzhou Grand Canal, adjacent upstream to the historic Doudou Road district, and surrounded by culturally protected buildings such as the ancient Xiangji Temple Pagoda. During construction, measures including excavation at a depth of about 10 meters below the riverbed and reinforcing the Xiangji Temple Pagoda with ground-based supports were implemented. These measures not only preserved the scenic beauty of the canal but also ensured the safety of the culturally protected structures. High technical difficulty: This project represents Hangzhou’s first-ever shield tunneling operation involving a large-diameter tunnel with an exceptionally small curve radius. The tunnel’s minimum curve radius is just 500 meters—far below the standard 600-meter curve radius typically seen in 11-meter-class tunnel boring machines. Moreover, the project requires closely passing alongside multiple buildings and dealing with the complex conditions of twin-tunnel shield driving under the canal, placing extremely high demands on the control of tunneling parameters.
Year of commencement: August 2018
Year of completion: June 2020
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