The Mechanical Response & Wall Rock's Stability Evaluation Study Of Big Section Highway Tunnel

With the rapid development of highway,the big section highway tunnel takes a new step forward,which promotes more advanced challenges and requestion to tunnel's design and construction technique.This paper takes the tunnel's site monitor and survey as the point of departure,introduces the application and content of monitor and survey and the date analysis process.On the base of these ,the writer analyses the stress and deformation of round cave's wall rock,analyses and summarizes the effect mechanism of kinds of supporting parameters,concludes and discusses the criterion of wall rock's stability,and then sums up the monitor and survey's information,provides writer's own opinions on the criterion of wall rock's stability.Through the numerical analysis of big section highway tunnel in different construction methods,the writer analyses the tunnel's displacement and stress in different construction state,and offers reasonable construction scheme.In the end of this paper,the writer analyses the results of monitor and survey of III class surrounding rock in different engineering measures,appraises the design parameter of big segment highway tunnel.