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Sensitivity Analysis of the Effect of Depth and Slope Gradient on the Surrounding Rock Stability for Shallow-Buried Tunnels
(1 Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai′an 271019; 2 Key Laboratoryof Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001)
Abstract The sensitivity analysis of the effects of buried depth and slope gradient on surrounding rock stability is very important for alignment selection and the determination of a construction scheme for a shallow-buried tunnel.The deformation rules of surrounding rock under different bias angles and buried depths have been analyzed in previous work, and based on this, a sensitivity analysis is proposed to study the sensitivity of the effects of tunnel overburden and slope gradient on the stability of surrounding rock (surface settlement, vault settlement and plastic zone distribution). The results show the surface settlement and vault settlement are relatively sensitive to tunnel overburden but not so sensitive to the bias angle; as for the plastic zone area, it is more sensitive to the bias angle than the buried depth of tunnel.
Abstract：
The sensitivity analysis of the effects of buried depth and slope gradient on surrounding rock stability is very important for alignment selection and the determination of a construction scheme for a shallow-buried tunnel.The deformation rules of surrounding rock under different bias angles and buried depths have been analyzed in previous work, and based on this, a sensitivity analysis is proposed to study the sensitivity of the effects of tunnel overburden and slope gradient on the stability of surrounding rock (surface settlement, vault settlement and plastic zone distribution). The results show the surface settlement and vault settlement are relatively sensitive to tunnel overburden but not so sensitive to the bias angle; as for the plastic zone area, it is more sensitive to the bias angle than the buried depth of tunnel.
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Cite this article:
.Sensitivity Analysis of the Effect of Depth and Slope Gradient on the Surrounding Rock Stability for Shallow-Buried Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(4): 91-96
2017, Vol. 54 