Hyperstatic Reaction Method for the Design of U-Shaped Tunnel Supports
Publication: International Journal of Geomechanics
Volume 18, Issue 6
Abstract
This paper presents a numerical hyperstatic reaction method (HRM) for analyzing U-shaped (with inverted arch) tunnel structures. A comparison of the results obtained from two different load conditions, i.e., with and without considering the change in depth of external loads under the effect of a gravity field, is presented. The parameters that have an effect on the design of the support structures are presented. The calculation code was developed by using the finite element method (FEM) framework. This code considers the effective geometry of the support, the horizontal and vertical loads, and enables analysis of the ground mass–structure interaction in detail. The proposed numerical HRM model is validated by using a finite difference model. The numerical results obtained show that the proposed HRM model can be used to effectively design inverted U-shaped tunnel supports. Also discussed is the influence of different parameters on the support structures, which make it possible to verify their influence on the dimensioning of the support structures.
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Acknowledgments
The first author thanks the China Scholarship Council for providing him with a Ph.D. Scholarship for his research work. This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant 105.08-2015.14. The authors also wish to thank the anonymous reviewers for their thoughtful suggestions that contributed to an important improvement to this work.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 6 • June 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jun 13, 2017
Accepted: Oct 30, 2017
Published online: Mar 16, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 16, 2018
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