The Application Of Informational Design And Construction Technology In Highway Tunnels.

Informational design and construction technology is a dynamic method on the basis of numerical simulation method.This paper systematically summarizes the current information construction and the related theoretical,knowledge of numerical analysis methods.As the background to chang'anling tunnel in hebei province,the tunnel rock physical and mechanical parameters were inversed analysis and the support structure design were optimal design,though the situ measurement and numerical simulated.This paper gave a guide to the design and construction of chang'anling tunnel.Trough the study of this paper,the author gave the following conclusions and recommendations:(1)The author collected the situ measurement of the multi-point displacement, and selected the face of the multi-point displacement to study.Two-dimensional finite element analysis model was established as the situ measurement of the multi-point displacement for the initial conditions.The rock physical and mechanical parameters were inversed analysis through the displacement by back-analysis techniques,and it was obtain by the minimum squares.(2)On the basis of the inversion physical parameters,the three-dimensional elastic-plastic model was established to gain the numerical simulation results on the step-by-step process of excavation.Compared with the situ measurement of the multi-point displacement,the numerical analysis and the situ measured data are almost closed.This proved that the inversion of parameters was also reasonable again.(3)Through the creation of three-dimensional elastic-plastic model,the author analyzed the spatial effect of tunnel excavation,and obtained the release of the rock displacement factorλof Chang'anling Tunnel,and drew a change curve that the displacement and stress of the face key node went along with the tunnel face excavation. Its stability was also evaluated.(4)By the inversion physical parameters,using the two-dimensional finite element model,the secondary lining of chang'anling tunnel was analyzed by numerical simulation to obtain the internal force.Then the reasonable thickness of the second of the tunnel lining was obtained by the strength safety factor.