Abstract
Based on the unified strength criterion, an analytical solution is proposed to explore the variation law of the impact of tunnel axial stress on the development of failure zone around a circular tunnel. The proposed method aims to deal with the non-axisymmetric problem under a high and complex three-dimensional stress condition. The mechanical behavior of the rock mass is considered to follow an elastic-brittle-plastic model. The conformal transformation is used to deal with the mathematical difficulties caused by the non-circular nature of the boundary. The procedure enables the quantitative representation of the unknown elastoplastic boundary through an undetermined mapping function. The differential-evolution algorithm is used to determine the boundary from the perspective of positive analysis. The presented solution is compared with published analytical solutions. The results show that the solution in this paper covers the first two solutions and is more reasonable than the last one, reflecting the reliability and generality of the new extended method. The parametric study is implemented to discuss the development of failure zone affected by various parameters.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
