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Geomechanics and Engineering Volume 16, Number 1, September20 2018 , pages 97-104 DOI: https://doi.org/10.12989/gae.2018.16.1.097 |
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Study on deformation law of surrounding rock of super long and deep buried sandstone tunnel |
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Lujun Ding and Yuhong Liu
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| Abstract | ||
| The finite difference software Flac3D is used to study the influence of tunnel burial depth, tunnel diameter and lateral pressure coefficient of original rock stress on the stress and deformation of tunnel surrounding rock under sandstone condition. The results show that the maximum shear stress, the radius of the plastic zone and the maximum displacement in the surrounding rock increase with the increase of the diameter of the tunnel. When the lateral pressure coefficient is 1, it is most favorable for surrounding rock and lining structure, with the increase or decrease of lateral pressure coefficient, the maximum principal stress, surrounding displacement and plastic zone range of surrounding rock and lining show a sharp increase trend, the plastic zone on the lining increases with the increase of buried depth. | ||
| Key Words | ||
| water conveyance tunnel; deformation of surrounding rock; numerical simulation; the lateral pressure coefficient; buried depth | ||
| Address | ||
| Lujun Ding: College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China Yuhong Liu: Sichuan College of Architectural Technology, Deyang, 618000, China | ||