• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • View Item
  •   Home
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Plastic deformation behavior in tunnel in schist and Schistose Mica Gneiss based on a case from Nepal Himalaya

Shrestha, Pawan Kumar; Panthi, Krishna Kanta
Chapter
Published version
View/Open
Plastic+deformation_ACUUS+Singapore_RP-013-P095.pdf (Locked)
URI
http://hdl.handle.net/11250/2483163
Date
2012
Metadata
Show full item record
Collections
  • Institutt for geovitenskap og petroleum [1855]
  • Publikasjoner fra CRIStin - NTNU [21000]
Abstract
Plastic deformation in tunnels is one of the few tunnel stability challenges that are being faced in the Himalayan region. Severe tunnel deformations have been recorded, particularly when tunnel passed through plastically deformed and highly schistose rock mass, weakness and shear zones. Therefore, there is essential to understand plastic deformation behavior of the rock mass and the interaction that rock mass has with the in-situ stress, mechanical properties of the rock mass, applied rock support. Such understanding enables us to make appropriate strategy in minimizing the stability challenges and using the appropriate tunnel construction methodology. The Khimti headrace tunnel experienced instability related to tunnel deformations in several tunnel stretches consisting mica schist and schistose mica gneiss. Monitored convergence pattern indicated that the tunnel deformation continued for a long period of time after excavation. This paper assesses the applicability of both Sulem et al (1987) approach in estimating long term time dependent deformation and Hoek and Marinos (2000) approach in estimating total tunnel convergence. The methods are finally verified by 3D numerical modeling in one of the tunnel stretches. The assessment indicated fairly good match between measured, back calculated and numerically modeled results.
Publisher
Research Publishing Services

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit