Study On Static And Dynamic Influence Of Suspension Bridge Tunnel Anchor Near Vehicular Tunnel

When the vehicular tunnel is connected with the suspension bridge with tunnel anchorage,it is easy to cause the tunnel anchorage to be close to the highway tunnel.At present,the research on the static and dynamic effects of this specific type of proximity project is limited.Based on the Huangjiayuan tunnel project of G317 highway and the tunnel anchorage of Zipingpu Bridge,this paper studies the influence of tunnel anchorage on highway tunnel by means of data investigation,summary and numerical simulation.The main research contents are as follows :(1)A reasonable and intuitive criterion and its threshold for the static and dynamic influence of tunnel anchor proximity are selected.In view of the tunnel anchor proximity project,the factors controlling the influence degree of tunnel anchor proximity are summarized,and the general formula for calculating the criterion is refined to obtain the calculation formula for the criterion applicable to the tunnel anchor proximity.(2)Taking the supporting project as an example,the influence of post-construction anchor tunnel construction on the stiffness and strength of the first tunnel is studied.The distribution of stiffness criterion and strength criterion values on the tunnel axis under different inclination angles,intersection angles and surrounding rock conditions is studied,and the influence degree of tunnel construction under various conditions is determined.According to the evolution of the pre-construction structure criterion in the construction process of the anchor hole,the control construction steps of the postconstruction anchor hole are determined.(3)Based on the PYTHON language,the secondary development of large general finite element software ABAQUS is carried out to realize the automatic application of viscoelastic boundary conditions and wave input in the software,which greatly improves the operating efficiency of the software.(4)Taking the supporting project as an example,the influence of anchor hole on the stiffness and strength of tunnel lining under seismic load is studied,and the influence degree of tunnel lining under seismic load is judged by dynamic discriminant criterion.The convergence distribution of peak principal stress and peak clearance of tunnel lining under different inclination angles,different intersection angles and different surrounding rock conditions is studied,and the dynamic influence degree of tunnel under different working conditions is determined.(5)According to the value of discriminant criterion under discrete conditions,the static and dynamic influence partitions in the multidimensional space of influencing factors are obtained.