Stability Analysis of Tunnel Envelope Based on Ubiquitous-Joint Model

LI Yizhao; YU Rangang; YANG Wendong; SONG Ruosong; HE Jiale; ZHANG Haiqiang; GAO Mingli

doi:10.3724/j.gyjzG23092006

Volume 55 Issue 11

Nov. 2025

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LI Yizhao, YU Rangang, YANG Wendong, SONG Ruosong, HE Jiale, ZHANG Haiqiang, GAO Mingli. Stability Analysis of Tunnel Envelope Based on Ubiquitous-Joint Model[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 204-211. doi: 10.3724/j.gyjzG23092006

Citation:

LI Yizhao, YU Rangang, YANG Wendong, SONG Ruosong, HE Jiale, ZHANG Haiqiang, GAO Mingli. Stability Analysis of Tunnel Envelope Based on Ubiquitous-Joint Model[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 204-211. doi: 10.3724/j.gyjzG23092006

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Stability Analysis of Tunnel Envelope Based on Ubiquitous-Joint Model

doi: 10.3724/j.gyjzG23092006

China University of Petroleum (East China), College of Storage, Transportation and Construction Engineering, Qingdao 266580, China

Received Date: 2023-09-20
Available Online: 2026-01-06
Publish Date: 2025-11-20

Abstract

Abstract

To investigate the excavation stability of horseshoe tunnels through different jointed rock body inclinations， a section of Qingdao Metro Line 8 was selected as the study object， and the FLAC^3Delastic-plastic model of joints was employed for simulation， to analyze the displacement of the tunnel's surrounding rock， the construction of the step method， and the law of shear stress. The findings of the research demonstrated that in geology with dense joint development， the displacement of the tunnel surrounding rock increased at the joint intersections. When joint tendencies were perpendicular to the horseshoe tunnel excavation direction， joint inclination angles ranging from 0° to 30°， the deformation was reduced by 16.1%； and joint inclination angles ranging from 30° to 90°， the deformation was reduced by 8.5%. The step method was more effective than the full-section method in maintaining the stability of the palm face and the surrounding rock in the broken rock layer. For joint inclination angles ranging from 0° to 30°， the shear stress rose diagram of the tunnel's surrounding rock was assumed to have a "butterfly" shape； as the joint inclination angle increased， the shear stress of the surrounding rock decreased.
- elasticity model,
- jointed rock mass,
- surrounding rock stability,
- numerical simulation

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References(15)

References

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