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Physical modeling experimental study on failure mechanism of surrounding rock of deep-buried soft tunnel based on digital image correlation technology

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Abstract

In this paper, a physical model experiment was conducted to study the deformation and failure mechanism of surrounding rock of deep-buried soft tunnel. With the help of noncontact displacement monitoring system, strain data acquisition system, and high-definition camera, the displacement field data, the strain field data, and the deformation and failure process of surrounding rock were obtained during the experiment. The results of study showed that the excavation footage and horizontal stress had a significant influence on the deformation of surrounding rock of deep-buried soft rock tunnel; the surrounding rock had obvious asymmetrical deformation, and the key position of failure was located at the top and right side of tunnel; the uncoordinated deformation areas were the potential dangerous destruction areas of surrounding rock; and the surrounding rock of tunnel was destroyed under the combined action of tension and compression stress.

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Acknowledgements

The authors of this paper are very grateful to the reviewers for their valuable and pertinent suggestions for the revision of this article, and also to the support and help of their families.

Funding

This work was supported by the National Key Research and Development Plan of China (Grant No. 2016YFC0600901), the National Natural Science Foundation of China (Grant No. 51374214), the State Key Laboratory of Open Funds (Grant No. SKLGDUEK1826), the Special Fund of Basic Research and Operating (Grant No. 2009QL03), and the Yueqi Outstanding Scholar Award Program of China University of Mining and Technology, Beijing, and the Science and Technology Projects Funds of State Grid Corporation Headquarters of China.

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Authors and Affiliations

  1. State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Xiaoming Sun, Peng Song, Chengwei Zhao, Yong Zhang, Gan Li & Chengyu Miao

  2. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Xiaoming Sun, Peng Song, Chengwei Zhao, Yong Zhang, Gan Li & Chengyu Miao

Authors
  1. Xiaoming Sun
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  2. Peng Song
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  3. Chengwei Zhao
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  4. Yong Zhang
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  5. Gan Li
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  6. Chengyu Miao
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Correspondence to Xiaoming Sun.

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Sun, X., Song, P., Zhao, C. et al. Physical modeling experimental study on failure mechanism of surrounding rock of deep-buried soft tunnel based on digital image correlation technology. Arab J Geosci 11, 624 (2018). https://doi.org/10.1007/s12517-018-3979-3

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  • DOI: https://doi.org/10.1007/s12517-018-3979-3

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