Mechanical Responses of Underlying Tunnels Subjected to Surface Surcharge in Soft Ground
Publication: Journal of Performance of Constructed Facilities
Volume 37, Issue 5
Abstract
A case history of surcharge-induced large deformations and noticeable leakages occurring on existing underlying twin tunnels in soft ground is presented in this paper. The field conditions are well-documented in terms of the processes of the surcharge and discharge as well as the structural mechanical responses of the tunnels. The longitudinal distribution curve and evolution of the tunnel vertical displacement are investigated in association with the surcharge and discharge activities. Structural damages and transverse deformations, including water leakages, cracks, unfilled corners, dislocations, and horizontal convergences, are also explicitly examined and analyzed. To derive insight into the relationship between the tunnel deformations and the surcharge, the ground settlements at different elevations due to the surcharge are calculated using a simplified method without considering the effect of the existing tunnel. Further, a modified two-stage method is adopted to estimate the longitudinal tunnel settlements, bending moments, and shear forces, in which the tunnel and underlying ground are modeled as a Timoshenko beam and Winkler foundation, respectively. Finally, for the upcoming preparation for the tunnel operation and planned road construction, practical suggestions for strengthening the tunnel and future construction activities are proposed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The research is supported by funds of the National Natural Science Foundation of China (Grant Nos. 52108318, 52090082, 51938005, and 52122807), and Youth Science and Technology Innovation Talent Project of Hunan Province (Grant No. 2021RC3043).
References
BTS (British Tunnel Standard). 2004. Tunnel lining design guide. London: Thomas Telford.
Chen, R. P., F. Y. Meng, Z. C. Li, Y. H. Ye, and J. N. Ye. 2016. “Investigation of response of metro tunnels due to adjacent large excavation and protective measures in soft soil.” Tunnelling Underground Space Technol. 58 (Sep): 224–235. https://doi.org/10.1016/j.tust.2016.06.002.
Chen, R. P., X. Song, F. Y. Meng, H. N. Wu, and X. T. Lin. 2022. “Analytical approach to predict tunneling-induced subsurface settlement in sand considering soil arching effect.” Comput. Geotech. 141 (Jan): 104492. https://doi.org/10.1016/j.compgeo.2021.104492.
Chen, S., H. N. Wu, R. P. Chen, S. L. Shen, and Y. Liu. 2021. “Research on deformation of collinear tunnel induced by overlying long-distance excavation.” [In Chinese.] J. Shanghai Jiaotong Univ. 55 (6): 698–706. https://doi.org/10.16183/j.cnki.jsjtu.2020.026.
Cheng, H. Z., R. P. Chen, H. N. Wu, F. Y. Meng, and Y. L. Yi. 2020. “General solutions for the longitudinal deformation of shield tunnels with multiple discontinuities in strata.” Tunnelling Underground Space Technol. 107 (Jan): 103652. https://doi.org/10.1016/j.tust.2020.103652.
Chinese Standard. 2013. Code for design of metro. GB50157 2013. Beijing: China Architecture Publishing & Media.
FISI (Fuzhou Investigation and Surveying Institute). 2021. Report for results of three-dimensional laser scanning on tunnel structure of Huanlegu-Difengjiang section of Fuzhou Metro Line 5. [In Chinese.] Fuzhou, China: FISI.
Huang, H. W., H. Shao, D. M. Zhang, and F. Wang. 2017. “Deformational responses of operated shield tunnel to extreme surcharge: A case study.” Struct. Infrastruct. Eng. 13 (3): 345–360. https://doi.org/10.1080/15732479.2016.1170156.
Liu, X., Y. Bai, Y. Yuan, and H. A. Mang. 2015. “Experimental investigation of the ultimate bearing capacity of continuously jointed segmental tunnel linings.” Struct. Infrastruct. Eng. 12 (10): 1364–1379. https://doi.org/10.1080/15732479.2015.1117115.
Mair, R. J. 2008. “Tunnelling and geotechnics: New horizons.” Géotechnique 58 (9): 695–736. https://doi.org/10.1680/geot.2008.58.9.695.
Meng, F. Y., R. P. Chen, and X. Kang. 2018. “Effects of tunneling-induced soil disturbance on post-construction settlement in structured soft soils.” Tunnelling Underground Space Technol. 80 (Oct): 53–63. https://doi.org/10.1016/j.tust.2018.06.007.
Meng, F. Y., R. P. Chen, X. Kang, and Z. C. Li. 2020a. “ curve-based structural parameter for assessing of clayey soil structure disturbance.” Bull. Eng. Geol. Environ. 79 (8): 4387–4398. https://doi.org/10.1007/s10064-020-01833-8.
Meng, F. Y., R. P. Chen, S. L. Liu, and H. N. Wu. 2021. “Centrifuge modeling of ground and tunnel responses to nearby excavation in soft soil.” J. Geotech. Geoenviron. Eng. 147 (3): 04020178. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002473.
Meng, F. Y., R. P. Chen, S. W. Xie, H. N. Wu, and Y. Liu. 2020b. “Observed behaviors of a long and deep excavation and collinear underlying tunnels in Shenzhen granite residual soil.” Tunnelling Underground Space Technol. 103 (Sep): 103504. https://doi.org/10.1016/j.tust.2020.103504.
Meng, F. Y., R. P. Chen, Y. Xu, K. Wu, H. N. Wu, and Y. Liu. 2022. “Contributions to responses of existing tunnel due to nearby excavation: A review.” Tunnelling Underground Space Technol. 119 (Jan): 104195. https://doi.org/10.1016/j.tust.2021.104195.
MOHURD (Ministry of Housing and Urban-Rural Development of China). 2018. Technical standard for maintenance of tunnel structures in urban rail transit. Beijing: MOHURD.
Molins, C., and O. Arnau. 2011. “Experimental and analytical study of the structural response of segmental tunnel linings based on an in situ loading test. Part 1: Test configuration and execution.” Tunnelling Underground Space Technol. 26 (6): 764–777. https://doi.org/10.1016/j.tust.2011.05.002.
Pinto, F., and A. J. Whittle. 2014. “Ground movements due to shallow tunnels in soft ground. I: Analytical solutions.” J. Geotech. Geoenviron. Eng. 140 (4): 04013040. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000948.
Shen, S. L., H. N. Wu, Y. J. Cui, and Z. Y. Yin. 2014. “Long-term settlement behaviour of metro tunnels in the soft deposits of Shanghai.” Tunnelling Underground Space Technol. 40 (Feb): 309–323. https://doi.org/10.1016/j.tust.2013.10.013.
Timoshenko, S. P. 1921. “On the correction for shear of the differential equation for transverse vibrations of prismatic bars.” London Edinburgh Dublin Philos. Mag. J. Sci. 41 (245): 744–746. https://doi.org/10.1080/14786442108636264.
Wu, H. N., S. L. Shen, S. M. Liao, and Z. Y. Yin. 2015. “Longitudinal structural modelling of shield tunnels considering shearing dislocation between segmental rings.” Tunnelling Underground Space Technol. 50 (Aug): 317–323. https://doi.org/10.1016/j.tust.2015.08.001.
Wu, H. N., P. Zhang, R. P. Chen, X. T. Lin, and Y. Liu. 2020. “Grouting response to horizontal spoil discharge jet grouting with impacts on the existing tunnels.” J. Geotech. Geoenviron. Eng. 146 (7): 05020006. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002287.
Zeng, C. F., X. L. Xue, G. Zheng, T. Y. Xue, and G. X. Mei. 2018. “Responses of retaining wall and surrounding ground to pre-excavation dewatering in an alternated multi-aquifer-aquitard system.” J. Hydrol. 559 (Apr): 609–626. https://doi.org/10.1016/j.jhydrol.2018.02.069.
Zheng, G., J. Pan, X. S. Cheng, R. B. Bai, Y. M. Du, Y. Diao, and C. W. W. Ng. 2020. “Use of grouting to control horizontal tunnel deformation induced by adjacent excavation.” J. Geotech. Geoenviron. Eng. 146 (7): 05020004. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002276.
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© 2023 American Society of Civil Engineers.
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Received: Jun 2, 2022
Accepted: Jun 13, 2023
Published online: Aug 11, 2023
Published in print: Oct 1, 2023
Discussion open until: Jan 11, 2024
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