DSpace university logo mark
Advanced Search
Japanese | English 

NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Articles in academic journal >

Influence of confining pressure-dependent Young’s modulus on the convergence of underground excavation


File Description SizeFormat
TUST83_135.pdf647.4 kBAdobe PDFEmbargo until 2020-10-06

Title: Influence of confining pressure-dependent Young’s modulus on the convergence of underground excavation
Authors: Wu, Xuezhen / Jiang, Yujing / Guan, Zhenchang / Gong, Bin
Issue Date: 6-Oct-2018
Publisher: Elsevier Ltd
Citation: Tunnelling and Underground Space Technology, 83, pp.135-144; 2019
Abstract: The actual convergence of an excavation located in fractured rock mass or the soft rock is largely different with the theoretical result in many cases. Experimental results showed that the influence of confining pressure on Young's modulus is very significant. This paper attempted to illustrate the influence of the confining pressure-dependent Young's modulus in the ground reaction analyses of mountain tunnel. Firstly, the relationship between Young's modulus and confining pressure was described as a non-linear function according to the test results. Based on the plane strain axial symmetry assumption and the incremental theory of plasticity, equilibrium equations and compatibility equations of rock mass around a circular tunnel were deduced theoretically. Based on fourth Runge-Kutta method, a semi-analytical solution was achieved. Considering the effect of confining pressure on Young's modulus, the stress and deformation of rock mass around tunnel was calculated by both analytical and numerical methods. The influence of confining pressure-dependent Young's modulus in surrounding rock was estimated quantitatively. Finally, Tawara saka Tunnel in Japan was taken as an example to explain the influence of confining pressure-dependent Young's modulus. The results showed that the error with respect to the monitoring data was largely reduced with the confining pressure-dependent Young's modulus model, which indicated the necessity of considering the non-uniform distribution of Young's modulus.
Keywords: Confining pressure / Numerical simulation / Semi-analytical solution / Underground excavation / Young's modulus
URI: http://hdl.handle.net/10069/39990
ISSN: 08867798
DOI: 10.1016/j.tust.2018.09.030
Rights: © 2018 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/39990

All items in NAOSITE are protected by copyright, with all rights reserved.

 

Valid XHTML 1.0! Copyright © 2006-2015 Nagasaki University Library - Feedback Powerd by DSpace