Abstract
Based on the active failure mechanism generated by a spatial discretization technique, the stability of tunnel face was studied. With the help of the spatial discretization technique, not only the anisotropy and inhomogeneity of the cohesion but also the inhomogeneity of the internal friction angle was taken into account in the analysis of the supporting forces. From the perspective of upper bound theorem, the upper bound solutions of supporting pressure were derived. The influence of the anisotropy and heterogeneity on the supporting forces as well as the failure mechanisms was discussed. The results show that the spatial discretization characteristics of cohesion and internal frictional angle impose a significant effect on the supporting pressure, which indicates that above factors should be considered in the actual engineering.
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Foundation item: Project(2013CB036004) supported by the National Basic Research Program of China; Projects(51178468, 51378510) supported by the National Natural Science Foundation of China
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Yang, Xl., Li, Wt. & Pan, Qj. Influences of anisotropy and inhomogeneity on supporting pressure of tunnel face with kinematical approach. J. Cent. South Univ. 22, 3536–3543 (2015). https://doi.org/10.1007/s11771-015-2893-z
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DOI: https://doi.org/10.1007/s11771-015-2893-z