Small-scale model for investigating tunnel lining deformations
File(s)
Author(s)
Standing, JR
Lau, C
Type
Journal Article
Abstract
Tunnel linings in situ are rarely truly circular in form. Shapes depend on factors such as the nature of the lining, method of build, connections between segments, self-weight deformations and ground stresses. A small-scale two-dimensional simplified tunnel lining model comprising six segments was developed where the lining was loaded using a reaction ring. The results provide insight into factors that control the lining response: e.g. the deformed shape depends on the nature of the imposed loading, tightness of the bolts, number of segments and joint flexibility. This small-scale model was developed as a precursor to a sophisticated large-scale structural model used to assess the effect of tunnelling on existing tunnels (Yu et al., 2017). In this respect it proved very instructive, especially for assessing the method of loading the ring. An important message from the paper is how an inexpensive, but carefully thought out, small-scale model can provide great insight to the development of large-scale models that will involve orders of magnitude more time and expense. Many of the findings from the small-scale study were verified by the more realistic large-scale model which was able to provide details on deformations and stress changes in the segments and bolts.
Date Issued
2017-05-27
Date Acceptance
2017-05-21
Citation
Tunnels and Underground Space Technology, 2017, 68, pp.130-141
ISSN
0886-7798
Publisher
Elseiver
Start Page
130
End Page
141
Journal / Book Title
Tunnels and Underground Space Technology
Volume
68
Copyright Statement
© 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Geological & Geomatics Engineering
0905 Civil Engineering
0914 Resources Engineering And Extractive Metallurgy
Publication Status
Published