Analysis of Tunnel Excavation Deformation Based on FLAC3D

Deformation analysis of tunnel excavation is one of the core problems. FLAC3D is used to simulate tunnel excavation, including tunnel modeling, excavation and support, and analyzes the force and deformation characteristics in the construction process. On the basis of collecting tunnel data, made reasonable monitoring measurement scheme, and measurement of the real-time monitoring data for the initial analysis, analysis the excavation time and excavation length regarding the deformation of the surrounding rock, predicted the deformation trend, determine the total displacement of the surrounding rock deformation, and map the relationship to time to provide a reasonable time for the secondary lining, using FLAC3D software for numerical simulation of tunnel excavation, including tunnel modeling, excavation, support, and analyzed the force and deformation characteristics in the construction process. Different combined values of K and E are designed and applying the model built by the software as the normal calculation program of numerical simulation to obtain different displacement values of arch subsidence and hole circumference convergence.