Stability Analysis of Tunnel Surrounding Rock When TBM Passes through Fracture Zones with Different Deterioration Levels and Dip Angles

Mingtao Ji, Xuchun Wang, Minhe Luo, Ding Wang (), Hongwei Teng and Mingqing Du
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Mingtao Ji: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Xuchun Wang: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Minhe Luo: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Ding Wang: State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China
Hongwei Teng: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
Mingqing Du: School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China

Sustainability, 2023, vol. 15, issue 6, 1-15

Abstract: In fracture zones, tunneling with a double-shield Tunnel Boring Machine (TBM) presents significant challenges, including deformation overrun of the surrounding rock, TBM jamming, and excavation face collapse. To assure the tunnel construction safety and efficiency, it is necessary and crucial to conduct a stability analysis of the tunnel surrounding rock when a TBM passes through the fracture zones. The tunnels from Jiadingshan Road Station to Anshan Road Station in Qingdao Metro Line 8 are constructed by double-shield TBMs. It inevitably passes through fracture zones with different deterioration levels and dip angles. In this study, based on this construction section, numerical models of fracture zones with different deterioration levels and dip angles were developed to analyze the displacements of tunnel vaults, inverts, and haunches. In addition, the maximum shear stresses of the surrounding rock were analyzed. Finally, the displacement and shear stress variation patterns of the surrounding rock with different deterioration levels and dip angles were obtained. The findings reveal the stability behavior of tunnels under various fracture zones. They can serve as a valuable reference and theoretical foundation for future tunnel construction projects utilizing double-shield TBMs in areas with fracture zones.

Keywords: tunnel; TBM; fracture zone; numerical simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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