Site Monitoring And Numerical Simulation For Construction Of Highway Tunnel

As fast as the country's infrastructure construction, the highway as one of the hallmarks of modern society, has a large degree of popularity. In our country, mountains and hilly areas are most, the proper construction of highway tunnels not only can speed up the progress of the project, but also can improve line operation indicators, some of the tunnel sites affect by the terrain landform largely, how to use the existing construction of a more scientific and reasonable under the conditions of construction methods and parameters, and the construction of accurate and timely monitoring and using a variety of measures to guide the construction, to change the current experience-based design and construction of tunnel status.This article first describes the situation of domestic research at the tunnel, the focus of the tunnel excavation methods and support forms, and planning for highway tunnels separated the design and implementation, and monitoring measurement data are processed and analyzed, and determines the rock-support the stability , and provide the basis of the are made for the secondary lining's application; Through two-dimensional finite element model's create, three kind of excavation methods'election in the shallow section, methods of each excavation surrounding rock displacement and stress fields, initial support axial, shear, bend moment carried out a detailed analysis, comparing the advantages and disadvantages of three methods; a three-dimensional finite element model simulates the excavation, analysis the rock displacement and stress field variation of step with the excavation, and the simulation results compared with site monitoring data, draw some common rules, to achieve the guidance of tunnel construction, excavate optimize methods, improve the economic efficiency, for the follow-up similar tunnels'construction provides experience.