Location
Chicago, Illinois
Date
02 May 2013, 7:00 pm - 8:30 pm
Abstract
In the vicinity of known landslide zones, tunnel routes should be designed such that the distance between the landslide and the tunnel is sufficient to avoid adverse impact of the landslide on the tunnel. This requires a good understanding of the effects of the landslide on the tunnel. We modeled the ground surrounding the tunnel and the landslide using numerical analysis to evaluate the quantitative effect of the tunnel offset from the landslide on ground stresses and displacement of the ground surface and tunnel crown. We considered the effects under different ground conditions and examined two different cases, when the landslide occurs before tunnel construction and where the landslide movement occurs after tunnel construction. We found that the required offset distance between the landslide and the tunnel depended on whether the landslide occurred before or after tunnel excavation and the characteristics of the site conditions, and the method of setting the offset distance needs to consider the conditions at each site. As a result, we conclude that under some conditions, the offset required by current technical standards may be inadequate and further investigation would be required.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Ota, Keiichi; Kuraoka, Senro; and Takeshi, Toshiya, "Numerical Analysis to Examine the Effect of Landslides on Tunnels" (2013). International Conference on Case Histories in Geotechnical Engineering. 9.
https://scholarsmine.mst.edu/icchge/7icchge/session05/9
Numerical Analysis to Examine the Effect of Landslides on Tunnels
Chicago, Illinois
In the vicinity of known landslide zones, tunnel routes should be designed such that the distance between the landslide and the tunnel is sufficient to avoid adverse impact of the landslide on the tunnel. This requires a good understanding of the effects of the landslide on the tunnel. We modeled the ground surrounding the tunnel and the landslide using numerical analysis to evaluate the quantitative effect of the tunnel offset from the landslide on ground stresses and displacement of the ground surface and tunnel crown. We considered the effects under different ground conditions and examined two different cases, when the landslide occurs before tunnel construction and where the landslide movement occurs after tunnel construction. We found that the required offset distance between the landslide and the tunnel depended on whether the landslide occurred before or after tunnel excavation and the characteristics of the site conditions, and the method of setting the offset distance needs to consider the conditions at each site. As a result, we conclude that under some conditions, the offset required by current technical standards may be inadequate and further investigation would be required.
