Title
Investigation of the first quasi-rectangular metro tunnel constructed by the 0−θ method
Author
Li, Peinan (Donghua University)
Liu, Xue (Donghua University)
Jiang, Xi (University of Tennessee)
Zhang, X. (TU Delft Geo-engineering)
Wu, Jun (Shanghai University of Engineering Science)
Chen, Peixin (Shanghai Tunnel Engineering Co. Ltd.)
Date
2024
Abstract
Quasi-rectangular shield tunneling is a cutting-edge trenchless method for constructing metro tunnels with double tubes, owing to its advantages in saving underground space and reducing ground disturbance. However, the conventional quasi-rectangular shield tunneling method is not applicable when constructing a tunnel without a center pillar, such as a scissor crossover section of a metro line. Therefore, the 0−θ tunneling method, which combines the quasi-rectangular shield and pipe jacking methods, was investigated in this study to solve the aforementioned construction challenges. This study presents a case study of the Sijiqing Station of the Hangzhou Metro Line 9 in China, in which the 0−θ method was first proposed and applied. Key techniques such as switching between two types of tunneling modes and the tunneling process control in complex construction environments were investigated. The results demonstrated that the 0−θ method can address the technical challenges presented by the post-transition line with a high curvature and a scissors crossover line. In addition, the adoption of the 0−θ method ensured that the transformation between shield tunneling and pipe jacking was safe and efficient. The ground settlement monitoring results demonstrated that the disturbance to the surrounding environment can be limited to a safe level. This case study contributes to the construction technology for a metro tunnel containing both post-transition lines with a small turning radius and a scissors crossover line. A practical construction experience and theoretical guidance were provided in this study, which are of significance for both the industry and academia.
Subject
0−θ method
pipe jacking
quasi-rectangular tunnel
shield tunneling
underground space
To reference this document use:
http://resolver.tudelft.nl/uuid:2568936b-2f64-4f89-8d08-41b38e949bc0
DOI
https://doi.org/10.1007/s11709-023-0991-9
Embargo date
2024-07-11
ISSN
2095-2430
Source
Frontiers of Structural and Civil Engineering, 17 (11), 1707-1722
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Peinan Li, Xue Liu, Xi Jiang, X. Zhang, Jun Wu, Peixin Chen