Volume 2 Issue 3
Sep.  2009
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Van-hung DAO. 2009: Tunnel design considering stress release effect. Water Science and Engineering, 2(3): 87-95 . doi: 10.3882/j.issn.1674-2370.2009.03.009
Citation: Van-hung DAO. 2009: Tunnel design considering stress release effect. Water Science and Engineering, 2(3): 87-95 . doi: 10.3882/j.issn.1674-2370.2009.03.009

Tunnel design considering stress release effect

doi: 10.3882/j.issn.1674-2370.2009.03.009
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  • Corresponding author: Van-hung DAO
  • Received Date: 2009-03-12
  • Rev Recd Date: 2009-07-10
  • In tunnel design, the determination of installation time and the stiffness of supporting structures is very important to the tunnel stability. This study used the convergence-confinement method to determine the stress and displacement of the tunnel while considering the counter-pressure curve of the ground base, the stress release effect, and the interaction between the tunnel lining and the rock surrounding the tunnel chamber. The results allowed for the determination of the installation time, distribution and strength of supporting structures. This method was applied to the intake tunnel in the Ban Ve Hydroelectric Power Plant, in Nghe An Province, Vietnam. The results show that when a suitable displacement u0¬ ranging from 0.086 5 m to 0.091 9 m occurrs, we can install supporting structures that satisfy the stability and economical requirements

     

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