Optimization Design Method of Mountain Tunnel Lining Based on Stress Mapping Return Arithmetic

Due to the construction of mountain tunnels which take the drilling and blasting method of construction, the lining structure parameter optimization is an important problem to be solved. The paper proposed an optimization design method of mountain tunnel lining based on stress mapping return arithmetic, can calculate the lining safety factor with nonlinear finite element method and D-P criterion. After the method theory is introduced, it is applied in Hei shansi lining of tunnel structures analysis of Chang an lining of China. The numerical simulation experiment was conducted to study the typical cross-section of Chang an 1 tunnel lining thickness change on the stability of the tunnel states to discuss the correlation between the thickness of the lining of the tunnel structure and deformation and the internal forces. The result states the method is feasible and has guiding meaning for the tunnel construction.