Stability Analysys On Wall Rock And Nonlinearity Performance Study On Lined Tunnel

This dissertation was devoted to the stabilisation and nonlinear performance of the buried reinforced concrete lined tunnel.Applying the finite element analysis software ANSYS to simulation the construction and run procedure of the buried reinforced concrete lined tunnel, is a effective way to evaluate its stabilization. This article aim at the complex of the program processing of the conventional method that applying"anti-acting force"to simulate relaxation when excavated,applying the avianized element theory to predict the relationship between relaxazation ratio and Young's modulus of adjacent rock on the base of original material parameter relationship .Determining the curvilinear relationship between relaxazation ratio and avianized ratio of Young's modulus, get some piece of senseful conclusion,providing fundamental basis for simplifying finite element model.Because the the buried reinforced concrete lined tunnel is excaved in the nature rock stratum, geology environment is important to the structural design of lining.This approach simulated the stress relation between lining and wall rock,reconstructed the procedure of excavation, lining, water filing and inspection,gave appraisement on the service behavior of the tunnul.Aiming at the feature that under regulai service condition, most of the bending component have dehiscenced,approaching nonlinear status, the structure work under nonlinear status,applying finite element-nonlinear theory to analyse the nonlinear mechanics performance of reinforced concrete lining.Studied the safety and stabilization of the structure.The span of simulation context and material characteristic about finite element model will influence the accuracy and credence of the calculation results.This part studied the influence of different foundation scope to the response of earthquake,then fix the appropriate simulation context of foundation.At the same time,the tunnel is in wall rock,the Young's modulus of rock is hard to exactly determined,this part calculated the influence of different Young's modulus to the response of earthquake.