Research Article
Apr 1979
Simplified Analysis for Tunnel Supports
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VIEW THE REPLYPublication: Journal of the Geotechnical Engineering Division
Volume 105, Issue 4
Abstract
An improved closed-form solution is developed for calculating tunnel support thrusts, moments, and displacements. The solution directly models the interaction of an elastic, circular support with an elastic, isotropic, infinite ground mass. The major improvements in this solution over other solutions in the literature are: (1)A revised formulation of the compressibility ratio; and (2)the incorporation of the correct excavation unloading conditions for mined tunnels. The sensitivity of the tunnel support loads to variations in the relative support stiffness, support cross section, Poisson's ratio, and initial lateral stress ratio is demonstrated using the revised solution; these results are also compared to those from two other solutions in the literature. Discrepancies of up to 100% are found in the support forces calculated from the different solutions.
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Published In
Journal of the Geotechnical Engineering Division
Volume 105 • Issue 4 • April 1979
Pages: 499 - 518
Copyright
© 1979 American Society of Civil Engineers.
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Published in print: Apr 1979
Published online: Feb 11, 2021
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Authors
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Herbert H. Einstein, M.ASCE
Assoc. Prof., Massachusetts Inst. of Tech., Cambridge, Mass
Charles W. Schwartz, AM.ASCE
Grad. Research Asst.; Massachusetts Inst. of Tech., Cambridge, Mass
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