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The zonal disintegration mechanism of surrounding rock around deep spherical tunnels under hydrostatic pressure condition: A non-Euclidean continuum damage model

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Abstract

A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions. The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition are obtained. If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses, the number, size and location of fractured and nonfractured zones are determined. The effect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out. It is found from numerical results that the number, size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks.

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, 400045, Chongqing, China

    Xiaoping Zhou, Qinghong Hou & Yongxing Zhang

  2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, 400045, Chongqing, China

    Xiaoping Zhou & Yongxing Zhang

  3. Engineering Institute of Engineering Corps, PLA University of Science and Technology, 210007, Nanjing, China

    Qihu Qian

Authors
  1. Xiaoping Zhou
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  2. Qinghong Hou
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  3. Qihu Qian
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  4. Yongxing Zhang
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Corresponding author

Correspondence to Xiaoping Zhou.

Additional information

Project supported by the National Natural Science Foundation of China (Nos. 51279218, 51021001 and 51078371), Natural Science Foundation Project of CQ CSTC ( No. CSTC, 2009BA4046) and the Fundamental Research Funds for the Central Universities (No. CDJZR10205501).

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Zhou, X., Hou, Q., Qian, Q. et al. The zonal disintegration mechanism of surrounding rock around deep spherical tunnels under hydrostatic pressure condition: A non-Euclidean continuum damage model. Acta Mech. Solida Sin. 26, 373–387 (2013). https://doi.org/10.1016/S0894-9166(13)60034-8

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  • DOI: https://doi.org/10.1016/S0894-9166(13)60034-8

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