Research on schemes of shield direct cutting launching
With the development of shield construction technology,the use of shield direct cutting launch-ing for tunnel initiation has become increasingly prevalent.In shield tunneling construction,the launching is an important link that is prone to accidents.Compared to traditional manual chiseling of the tunnel door,the cutting disc directly cuts the tunnel door during direct cutting launching,avoiding the occurrence of a free surface on the soil mass of the tunnel face,thereby reducing.Taking the subway shield tunnel en-gineering in Zhengzhou shield direct cutting launching as a case study,the finite element software Midas GTS NX was employed to the effects of the tunnel portal break and dynamic tunneling shield in retaining structure deformation,deformation of soil around the pipe deformation and so on,verifying the shield end cut the rationality of the initial solution.In order to verify the reliability of numerical simulation,a com-parative analysis was conducted between the numerical calculation results and field monitoring data.The comparison showed consistent variation results,indicating that the results of numerical simulation are rea-sonable.
direct cutting launchingdynamic tunneling of shielddeformation analysismonitoring measurement
万方数据
维普
