NDLI: Upper bound analytical solution for surrounding rock pressure of shallow unsymmetrical loading tunnels

Content Provider	Springer Nature Link
Author	Lei, Ming feng Peng, Li min Shi, Cheng hua Xie, You jun Tan, Li xin
Copyright Year	2015
Abstract	By combining the results of laboratory model tests with relevant flow rules, the failure mode of shallow unsymmetrical loading tunnels and the corresponding velocity field were established. According to the principle of virtual power, the upper bound solution for surrounding rock pressure of shallow unsymmetrical loading tunnel was derived and verified by an example. The results indicate that the calculated results of the derived upper bound method for surrounding rock pressure of shallow unsymmetrical loading tunnels are relatively close to those of the existing “code method” and test results, which means that the proposed method is feasible. The current code method underestimates the unsymmetrical loading feature of surrounding rock pressure of shallow unsymmetrical loading tunnels, so it is unsafe; when the burial depth is less or greater than two times of the tunnel span and the unsymmetrical loading angle is less than 45°, the upper bound method or the average value of the results calculated by the upper bound method and code method respectively, is comparatively reasonable. When the burial depth is greater than two times of the tunnel span and the unsymmetrical loading angle is greater than 45°, the code method is more suitable.
Starting Page	2339
Ending Page	2347
Page Count	9
File Format	PDF
ISSN	20952899
Journal	Journal of Central South University of Technology
Volume Number	22
Issue Number	6
e-ISSN	22275223
Language	English
Publisher	Central South University
Publisher Date	2015-06-12
Publisher Place	Changsha
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	tunnel shallow buried tunnel unsymmetrical loading ultimate analysis method upper bound solution Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Engineering

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