Date
02 Jun 1988, 10:30 am - 3:00 pm
Abstract
Data regarding the performance of three tunnelling projects in the Himalayan region has been collected. It is seen that rock loads or deformations calculated on the basis of Barton, Bieniawski or RMR approach do not match the field data. A mathematical model has been developed incorporating modifications in the approach of Brown et.al of rock-support interaction, using elastic-strain softening-plastic ground characteristics. A non-linear relationship between radial and tangential strains around the tunnel has been considered and the method of calculation of stresses and deformations altered to incorporate exact integration of the governing differential equation for a thin cylindrical annulus replacing finite difference approximation. It is seen that a closer match and a more rational explanation of the observed data from the tunnelling project is provided by the mathematical model.
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
Ramamurthy, T. and Sharma, V. M., "Performance of Some Tunnels in Squeezing Rocks of Himalayas" (1988). International Conference on Case Histories in Geotechnical Engineering. 24.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session2/24
Performance of Some Tunnels in Squeezing Rocks of Himalayas
Data regarding the performance of three tunnelling projects in the Himalayan region has been collected. It is seen that rock loads or deformations calculated on the basis of Barton, Bieniawski or RMR approach do not match the field data. A mathematical model has been developed incorporating modifications in the approach of Brown et.al of rock-support interaction, using elastic-strain softening-plastic ground characteristics. A non-linear relationship between radial and tangential strains around the tunnel has been considered and the method of calculation of stresses and deformations altered to incorporate exact integration of the governing differential equation for a thin cylindrical annulus replacing finite difference approximation. It is seen that a closer match and a more rational explanation of the observed data from the tunnelling project is provided by the mathematical model.
