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research article

Pressure tunnels in non-uniform in situ stress conditions

Simanjuntak, T. D. Y. F.
•
Marence, M.
•
Mynett, A. E.
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2014
Journal of Tunnelling und Underground Space Technolog

The bearing capacity of prestressed concrete-lined pressure tunnels is governed by the in situ stress of rock mass, which generally has different magnitudes in the vertical and horizontal direction. Two cases were distinguished, based on whether the vertical stress is greater than the horizontal stress or not. By means of a finite element model (FEM), the resulting distribution of stresses, strains and deformations due to tunnelling processes was revealed. The bearing capacity of pressure tunnels was determined based on the superposition principle. The results obtained demonstrate the significance of horizontal-tovertical stress coefficients in the bearing capacity of pressure tunnels prestressed by grouting. Favourite locations where crack openings in the final lining may occur are identified, which is useful for taking measures regarding the tunnel tightness and stability.

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Type
research article
DOI
10.1016/j.tust.2014.03.006
Web of Science ID

WOS:000336819600023

Author(s)
Simanjuntak, T. D. Y. F.
•
Marence, M.
•
Mynett, A. E.
•
Schleiss, Anton  
Date Issued

2014

Publisher

Pergamon-Elsevier Science Ltd

Published in
Journal of Tunnelling und Underground Space Technolog
Volume

42

Start page

227

End page

236

Subjects

Pressure tunnels

•

Non-uniform in situ stress

•

prestressed lining

•

numerical model

Note

[958]

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCH  
PL-LCH  
Available on Infoscience
April 9, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/102649
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