Study on Failure Mode of Shallow Buried Multi-arch Tunnel

Abstract

The failure mode of surrounding rock of shallow buried multi-arch tunnel was an important content of stability analysis of multi-arch tunnel. Through systematic theoretical study, three-dimensional geo-mechanics model test and field monitoring sample comprehensive means, based on the Hoek-Brown criterion, the numerical analytical solution of the failure mode of surrounding rock of shallow buried continuous arch tunnel was established by the plastic limit analysis, and the three-dimensional geo-mechanical model of the failure mode of the surrounding rock of shallow buried continuous arch tunnel under 3 kinds of excavation methods was studied. Through the field test, the failure mode of shallow buried multi arch tunnel was obtained, and the design theory of shallow buried multi-arch tunnel was improved.