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Applicability of Ubiquitous-Joint Model in Layered Rocks Simulation
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    Abstract:

    To address the limitations of the Ubiquitous-Joint model which does not consider the effects of joint length, joint spacing, and joint stiffness, the parameters of the Ubiquitous-Joint model in FLAC3D were calibrated using triaxial compression numerical tests and parameter calibration criteria. The distinctions of modeling results between the Ubiquitous-Joint model and the 3DEC model including the deformation, the plasticity zone, and the maximum principle stress were compared and analyzed by an example of circular tunnel excavation. Based on the Xinhua Mountain Tunnel project with typical layered rock mass, the deformation and failure mode were analyzed with the calibrated Subiquitous model and discrete element method after the tunnel was excavated and primary support finished. Finally, the deformation and plastic zone of surrounding rock influenced by bedding angle was discussed, which further verified the applicability of the calibrated Subiquitous model in engineering. The results confirm that the calibrated Subiquitous model is capable to well describe the anisotropic behavior of layered rock, which can be applied to similar engineering projects.

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  • Received:
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  • Online: October 07,2023
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