Improving the flexibility of the support system is an effective measure to prevent structural failure caused by large deformation of the surrounding rock in tunnels passing through red sandstone stratum. By utilizing the staged support installation method, the initial install location of the supports can be adjusted to control the flexibility of the support system. However, there is currently no corresponding analytical solution available to accurately predict the mechanical behavior of the surrounding rock and supports. This paper proposes an analytical solution for the whole process of interaction between the surrounding rock and supports. Firstly, based on the improved unified strength criterion and non-associated flow rule, an elastoplastic analysis of the surrounding rock of a circular tunnel in red sandstone stratum is conducted, which takes into account intermediate principal stress, dilatancy, and nonlinear strain-softening properties. Next, six types of interaction between the surrounding rock and supports are proposed, along with corresponding judge theorems. Furthermore, an analytical solution for the mechanical response of the surrounding rock and supports during the whole construction process are presented. After verifying its effectiveness, a parametric analysis is performed to investigate the influence of design parameters on the supporting effect. Finally, the application effect of the staged support installation method is compared with that of the traditional method, and the cost savings advantage of the former is demonstrated.


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    Titel :

    Analytical Solution for Interaction between Tunnel Surrounding Rock and Supports in Red Sandstone Stratum


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Li, Zhen (Autor:in) / Xu, Haiyan (Autor:in) / Wang, Zhijie (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2023-11-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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