Research on In-situ Expansion Construction Technology for Existing Super-Large Section Tunnels
DOI:
https://doi.org/10.70088/skv23g25Keywords:
tunnel engineering, tunnel in-situ expansion, tunnel lining demolition, tunnel temporary supportAbstract
Taking the first in-situ expansion project of an existing single-tube three-lane highway tunnel in China (the DaChangshan No.1 Tunnel on the Zhongkai Expressway) as the research object, this paper summarizes and introduces the key technologies involved in the in-situ expansion construction of existing super-large section tunnels, including the lining cutting scheme for large-span tunnels, the temporary support system for in-situ expanded tunnels, and the zonal excavation scheme for tunnel in-situ expansion. The research results can provide a reference for the in-situ expansion construction of existing super-large section tunnels under similar conditions.References
C. He, and B. Wang, "Research progress and development trends of highway tunnels in China," Journal of Modern Transportation, vol. 21, no. 4, pp. 209-223, 2013. doi: 10.1007/s40534-013-0029-4
L. Yuming, "Digital Identity," In Sovereignty Blockchain 2.0: New Forces Changing the World of Future, 2022, pp. 87-125. doi: 10.1007/978-981-19-3862-7_3
H. Yang, J. Gao, Y. Ding, X. Chen, Z. Lin, H. Wu, and Z. Yang, "Mechanical response of broken surrounding rock by in-situ expansion of highway tunnel," Bulletin of Engineering Geology and the Environment, vol. 84, no. 5, p. 214, 2025. doi: 10.1007/s10064-025-04232-z
X. Zheng, X. Kang, K. Xu, T. Chen, X. Huo, and C. Chen, "Study on Evolution of Surrounding Rock Stability and Structural Mechanical Behavior During In-Situ Expansion of Existing Tunnels in Weak Rock Mass," In 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025). SAE Technical Paper., December, 2025. doi: 10.4271/2025-99-0207
X. Cheng, B. Wang, X. Guo, and L. Zhang, "A novel in-situ tunnel expansion method based on removable prestressed active support technology for rapid construction," Tunnelling and Underground Space Technology, vol. 168, p. 107155, 2026. doi: 10.1016/j.tust.2025.107155
R. SpA, "Widening the Nazzano motorway tunnel from two to three lanes+ an emergency lane without interrupting traffic," .
S. Zhao, W. Sun, X. Liu, X. Zhou, X. Deng, Z. Zhong, and H. Yang, "Mechanical responses and reinforcement assessment of non-typical in-situ enlargement for closely spaced tunnel groups in weak surrounding rock," Transportation Geotechnics, 2026. doi: 10.1016/j.trgeo.2026.101931
H. Dayong, Z. Xingwu, L. Lei, C. Hao, L. Dong, Y. Zihai, and Y. Jiajia, "Study on the construction method for in-situ expansion of existing large cross-section tunnels," Discover Applied Sciences, vol. 7, no. 6, p. 556, 2025. doi: 10.21203/rs.3.rs-5446124/v1
F. Hou, Y. Luo, Q. Jiang, J. Chen, T. Li, and F. Dong, "Analysis on construction deformation and supporting structure of two-step and threesection excavation method for super larger span highway tunnel," Stavební obzor-Civil Engineering Journal, vol. 29, no. 1, 2020. doi: 10.14311/cej.2020.01.0010
N. A. Munfah, and C. J. Hung, "First Comprehensive Tunnel Design Manual in the United States," North American Tunneling 2010 Proceedings, vol. 387, 2010.
F. Dong, Y. Luo, J. Chen, C. Wang, Y. Liu, and W. Xun, "Mechanical Behavior of Secondary Lining in Super Large-Span Tunnels Considering Temperature Effects," Symmetry, vol. 16, no. 3, p. 339, 2024. doi: 10.3390/sym16030339
Downloads
Published
Issue
Section
License
Copyright (c) 2026 Yanbin Lou, Hao Cui (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
