Abstract
In order to study the influence of shield tunneling on existing high-speed railway lines. Combined with centrifuge test and three-dimensional numerical simulation, the dynamic response of shield tunnel undercrossing existing high-speed railway tunnel was studied, and the influence of settlement joint and steel pipe pile reinforcement on existing tunnel was analyzed. The results show that: (1) the construction joints of existing tunnels significantly reduce the shielding effect of existing high-speed railway tunnels on the ground; (2) The settlement value of the existing tunnel caused by double-line shield tunnel construction needs to be controlled by steel pipe pile reinforcement to meet the requirements of the specification; (3) The double-line shield tunnel construction has little effect on the internal force of the existing high-speed railway tunnel, and the reinforcement of the high-speed railway tunnel lining meets the stress requirements.
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Acknowledgements
This work was funded by the National Natural Science Foundation of China under Grant Nos. 51978669 and the China Railway Design Corporation Foundation under Grant Nos. 721239. The authors were grateful for the great support awarded.
Funding
This work was funded by the National Natural Science Foundation of China under Grant Nos. 51978669 and the China Railway Design Corporation Foundation under Grant Nos. 721239. The authors were grateful for the great support awarded. The authors have no relevant financial or non-financial interests to disclose.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by LP and RF, the first draft of the manuscript was written by RF, LP, CZ, JZ and PZ. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Fei, R., Peng, L., Zhang, C. et al. Experimental and Numerical Studies of a Shield Twin Tunnel Undercrossing the Existing High-Speed Railway Tunnel. Geotech Geol Eng 42, 1871–1886 (2024). https://doi.org/10.1007/s10706-023-02650-y
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DOI: https://doi.org/10.1007/s10706-023-02650-y