APPLICATION STUDY ON BENCH METHOD WITH LARGE ARCH SPRINGING OF RAPID TRANSIT RAILWAY SHALLOW BURIED TUNNEL

For the aerodynamic effect,rapid transit railway tunnel usually has two-lane section with a single hole.Especially,the technique difficulty and security risks of a shallow buried tunnel excavation is very obvious;therefore,it is very important to choose a reasonable driving method for constructing the shallow buried tunnel.At present,construction study on bench method with large arch springing isn't very much.Based on a rapid transit railway shallow buried tunnel,by using the method of numerical simulation and site test,the application on bench method with large arch springing of rapid transit railway shallow buried tunnel was studied.The shallow buried tunnel construction was finished successfully,by the bench method with large arch springing and the measured data were basically consistent with numerical simulation results,which showed that the proposed construction schemes based on theoretical analysis and numerical simulation was scientific and reasonable.