Location
New York, New York
Date
16 Apr 2004, 8:00am - 9:30am
Abstract
With increase in the dynamic envelope of trains due to the increase of their cross section and speed, the need for widening tunnel cross section of existing tunnels is becoming a necessity. One of the solutions to this problem consists of cutting a fraction of the masonry liner thickness and replacing it with a higher strength, and therefore, a thinner material. In this paper, the case of the widening of the Roches de Condrieu tunnel on the Paris to Marseilles railway line is presented. A maximum of half of the thickness of the existing masonry liner should be removed somewhere between the tunnel crown and the springline. Three-dimensional finite element analysis was used to simulate the effect of this partial cutting of the liner over a limited specified length along the tunnel axis. This study allowed the determination of the maximum length of cutting along the tunnel axis without creating any stability problem for the tunnel section. Once the section cut is reinforced by a higher strength material such as steel fiber reinforced shotcrete, the work resumed with alternating panels.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, 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
Nasri, Verya; Winum, Christian; and Benslimane, Aomar, "Analysis of Tunnel Section Enlargement Through Cutting Masonry Liner (Paris-Marseilles Roches De Condrieu Railway Tunnel Case Study)" (2004). International Conference on Case Histories in Geotechnical Engineering. 1.
https://scholarsmine.mst.edu/icchge/5icchge/session06/1
Analysis of Tunnel Section Enlargement Through Cutting Masonry Liner (Paris-Marseilles Roches De Condrieu Railway Tunnel Case Study)
New York, New York
With increase in the dynamic envelope of trains due to the increase of their cross section and speed, the need for widening tunnel cross section of existing tunnels is becoming a necessity. One of the solutions to this problem consists of cutting a fraction of the masonry liner thickness and replacing it with a higher strength, and therefore, a thinner material. In this paper, the case of the widening of the Roches de Condrieu tunnel on the Paris to Marseilles railway line is presented. A maximum of half of the thickness of the existing masonry liner should be removed somewhere between the tunnel crown and the springline. Three-dimensional finite element analysis was used to simulate the effect of this partial cutting of the liner over a limited specified length along the tunnel axis. This study allowed the determination of the maximum length of cutting along the tunnel axis without creating any stability problem for the tunnel section. Once the section cut is reinforced by a higher strength material such as steel fiber reinforced shotcrete, the work resumed with alternating panels.
