Stability of Shallow Tunnel Using Rigid Blocks and Finite-Element Upper Bound Solutions
Publication: International Journal of Geomechanics
Volume 10, Issue 6
Abstract
Two methods of upper bound solutions were used to calculate the needed support pressure for shallow tunnel stability in cohesive-frictional ground. One uses a proposed rigid blocks failure mechanism for shallow rectangular tunnel of upper bound solution, and another uses a finite-element upper bound solution with linear program. In the rigid blocks failure mechanism, the velocity discontinuities in the side wall of the shallow rectangular tunnel occurred in both radial and tangent directions, so as to increase its flexibility. The main formulas for calculating support pressure were deduced for the above two methods; thereafter, the corresponding calculating programs were compiled. The needed support pressure for shallow tunnel stability and its parametric influences were obtained. The results show that both methods can be used effectively to analyze the stability problems of shallow rectangular tunnel using upper bound solutions.
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Acknowledgments
This paper was supported by the Program for New Century Excellent Talents in University (Grant No. UNSPECIFIEDNCET-08–0569) and Changxiang Highway Science and Technology Demonstration Project of China.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 10 • Issue 6 • December 2010
Pages: 242 - 247
Copyright
© 2010 ASCE.
History
Received: May 4, 2009
Accepted: Apr 28, 2010
Published online: Apr 30, 2010
Published in print: Dec 2010
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