Study on stability of portal section of High Slope Tunnel Based on numerical analysis

Due to the complexity of the portal section of high slope tunnel, unsafe accidents are prone to occur. Because of its convenience and accuracy, numerical simulation method is often used in tunnel stability analysis. In this paper, the excavation process of the slope and tunnel at the entrance of the...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2021-07, Vol.1972 (1), p.12035
Main Authors: Ding, Libo, Duan, Yuxin, Wei, Xiaohang, Wang, Fuhua, Song, Zhanping
Format: Article
Language:English
Subjects:
Computer simulation
Displacement
Excavation
Finite element method
Numerical analysis
Stability analysis
Tunnels
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Due to the complexity of the portal section of high slope tunnel, unsafe accidents are prone to occur. Because of its convenience and accuracy, numerical simulation method is often used in tunnel stability analysis. In this paper, the excavation process of the slope and tunnel at the entrance of the tunnel is simulated by using the finite element software MIDAS-GTS, taking the No.6 tunnel project of the Kovi-Agvida E60 Highway Line in Georgia as an example. According to the results of numerical calculation, although the excavation volume of the slope is large, the displacement is small and the stability is good; the deformation of the surrounding rock of the tunnel is stable, and the displacement of the supporting structure is small, and the maximum displacement is about 20 mm, which is located at the vault. Therefore, the monitoring work should be done well and the support can be strengthened properly during the construction.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1972/1/012035