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Reinforcement design and stability analysis for large-span tailrace bifurcated tunnels with irregular geometry
Citation
Lin, P and Zhou, Y and Liu, H and Wang, C, Reinforcement design and stability analysis for large-span tailrace bifurcated tunnels with irregular geometry, Tunnelling and Underground Space Technology, 38 pp. 189-204. ISSN 0886-7798 (2013) [Refereed Article]
Copyright Statement
Copyright 2013 Elsevier
DOI: doi:10.1016/j.tust.2013.07.011
Abstract
The stability analysis of large-span tailrace bifurcation tunnels with complex 3D geometries and the associated
challenges are presented in this paper. A new nonlinear reinforcement analysis method is firstly
proposed for the design of reinforcement systems, i.e. steel-reinforced concrete lining and rock bolts,
for large-span tailrace tunnel bifurcations with complex 3D geometries. The proposed method is then
implemented into FLAC3D using the FISH language to calculate the reinforcement parameters and the
resultant nonlinear stress distributions. After that, it is validated by comparing the concrete lining stresses
and reinforcement obtained by the proposed method with the analytical solutions for the ideal case of
a circular tunnel in an infinite elastic body. Finally, the new method is applied to calculate the distribution
of deformations, stresses, plastic zones and design the reinforcement system for the large-span tailrace
tunnel bifurcation in the Guandi Hydropower Station during the construction, operating and
maintenance periods, respectively. The calculated reinforcement parameters successfully guided the construction
of the tunnel. The proposed nonlinear reinforcement analysis method may also be beneficial to
the design and construction of other large-span tunnel bifurcations with complicated irregular cross
sections in similar hydropower projects currently ongoing in southwest China.
Item Details
Item Type: | Refereed Article |
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Keywords: | large-span tunnel stability, nonlinear reinforcement analysis and design, bifurcated tunnel, Guandi Hydropower Station |
Research Division: | Engineering |
Research Group: | Resources engineering and extractive metallurgy |
Research Field: | Geomechanics and resources geotechnical engineering |
Objective Division: | Construction |
Objective Group: | Construction processes |
Objective Field: | Civil construction processes |
UTAS Author: | Liu, H (Dr Hong Liu) |
ID Code: | 86677 |
Year Published: | 2013 |
Web of Science® Times Cited: | 44 |
Deposited By: | Engineering |
Deposited On: | 2013-10-09 |
Last Modified: | 2017-11-06 |
Downloads: | 0 |
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