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Analysis on Stability of Edge Roadbed in Large Mined-Out Regions Where the High-Speed Railway Pass

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Abstract

At present, the research results on the stability and reinforcement range of the subgrade when the high-speed railway traverses the edge of a large goaf are still scarce. Taking Guinan high-speed railway traversing the edge of the mined-out area of the Dapan well as the research object, high-speed rail load transfer depth and height of goaf impact were analyzed, Researching the stability of high-speed railway subgrade and the reinforcement range of goaf. The results show that Mined-out edge cracks more obvious development, High-speed railway subgrade at the edge of the goaf is more harmful than when located directly above the goaf; On the No.1 well goaf, the overlap zone between the height of the caving fissure zone and the depth of influence of the high-speed railway load appears, but the height of the goaf in the extremely soft rock will extend to the surface; The high-speed railway subgrade is mainly affected by the residual deformation of the gob of the Dapan well. At last, the reasonable reinforcement range is given through the finite element numerical calculation.

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The data used to support the findings of this study are available from the corresponding author upon request.

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Acknowledgements

This work was supported by A Project Shandong Province Higher Educational Science and Technology Program (No. J18KA194), Open Research Fund of Key Laboratory of Urban Underground Engineering of Ministry of Education (TUE2019-03; TUE2017-03), National Key R&D Program of China (2018YFC1505300-2).

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  1. School of Civil Engineering, Qingdao University of Technology, Qingdao, 266033, China

    Mingqing Du, Xuchun Wang & Jixian Zhu

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  1. Mingqing Du
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  2. Xuchun Wang
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  3. Jixian Zhu
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Correspondence to Mingqing Du.

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Du, M., Wang, X. & Zhu, J. Analysis on Stability of Edge Roadbed in Large Mined-Out Regions Where the High-Speed Railway Pass. Geotech Geol Eng 39, 1849–1860 (2021). https://doi.org/10.1007/s10706-020-01591-0

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  • DOI: https://doi.org/10.1007/s10706-020-01591-0

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