隧道特征线法的修正与发展

doi:10.13722/j.cnki.jrme.2013.1453

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Abstract The traditional characteristic line method takes the preliminary lining as elastic component. But infact so the deformation of preliminary lining in practical tunnel engineering is much bigger than elastic deformation and the preliminary lining would be in the plastic state. Preliminary lining is considered as elastic-plastic materials to correct the traditional characteristic line method and numerical limit analysis is conducted to work out the safety factor of tunnel surrounding rock. Thus the corrected characteristic curve of surrounding rock and the pressure on the surrounding rock and preliminary lining can be obtained through strict mechanic calculation. The corrected characteristic line method through numerical limit analysis based on FEM strength reduction can solve the problem of design and calculation of tunnel engineering quantitatively，which provides theoretical basis and calculation method for the tunnel design.

Key words： tunnelling engineering numerical limit analysis method FEM strength reduction method of characteristic line safety factor of surrounding rock preliminary lining

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2013.1453 OR http://www.rockmech.org/EN/Y2015/V34/Is1/3067

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