Tunnel design considering stress release effect

Van-hung DAO

doi:10.3882/j.issn.1674-2370.2009.03.009

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

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

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Tunnel design considering stress release effect

doi: 10.3882/j.issn.1674-2370.2009.03.009

Van-hung DAO^{*1, 2
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1.
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China
2.
Faculty of Hydraulic Construction, Water Resources University, Hanoi, Vietnam

More Information

Corresponding author: Van-hung DAO
Received Date: 2009-03-12
Rev Recd Date: 2009-07-10

Abstract

Abstract

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
- tunnel,
- supporting structures,
- stability,
- counter-pressure curve,
- stress release effect