In response to the difficulty of analyzing the surrounding rock state and stress plasticity during full cross-section excavation of tunnels under extremely high crustal stress condition,a plastic calculation model for surround-ing rock during full cross-section excavation of large cross-section tunnels under extremely high crustal stress condi-tion is established to analyze the distribution characteristics of crustal stress.The paper establishes a numerical simu-lation model under full cross-section excavation condition,analyzes the displacement characteristics of surrounding rock and the failure of plastic zone.The plastic deformation characteristics of surrounding rock during tunnel full cross-section excavation under extremely high crustal stress state is obtained,which can provide reference for studying similar engineering problems.
TunnelSurrounding Rock DeformationLarge Cross-sectionFull Cross-section ExcavationExtremely High Crustal StressPlastic FailureNumerical Simulation
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维普
