Date
02 Jun 1988, 10:30 am - 3:00 pm
Abstract
The failure of a 3 m x 4 m transport tunnel constructed below a dolomite stockpile has been investigated. It was found that the cracking of the reinforced concrete lining had most likely been caused by lateral distortion (sidesway) of the tunnel. The transverse shears across the tunnel roof and in the residual soil below the stockpile caused by the sloping stockpile were very high. The average shear stress even exceeded the shear strength of the weathered material around the tunnel. It is thus important to consider the transverse shear forces across the roof slab and the horizontal shear stresses in the surrounding soil in the design of a tunnel lining. In addition to strengthening the tunnel section by means of steel frames, an embankment was constructed at the toe of the stockpile in order to increase the stability. The embankment also reduced the average slope of the stockpile.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1988 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
Broms, B. B. and Lau, Y. S., "Failure of a Transport Tunnel Below a Dolomite Stockpile" (1988). International Conference on Case Histories in Geotechnical Engineering. 13.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session2/13
Failure of a Transport Tunnel Below a Dolomite Stockpile
The failure of a 3 m x 4 m transport tunnel constructed below a dolomite stockpile has been investigated. It was found that the cracking of the reinforced concrete lining had most likely been caused by lateral distortion (sidesway) of the tunnel. The transverse shears across the tunnel roof and in the residual soil below the stockpile caused by the sloping stockpile were very high. The average shear stress even exceeded the shear strength of the weathered material around the tunnel. It is thus important to consider the transverse shear forces across the roof slab and the horizontal shear stresses in the surrounding soil in the design of a tunnel lining. In addition to strengthening the tunnel section by means of steel frames, an embankment was constructed at the toe of the stockpile in order to increase the stability. The embankment also reduced the average slope of the stockpile.
