Analysis&Research on Influence of Bridge Construction on Existing Interval Tunnel Structure
With the continuous development and utilization of urban underground structure space,the phenomenon of intersection and parallelism between newly built bridges and existing interval tunnel structures is increasing day by day.Therefore,during bridge construction,it is inevitable to have a certain impact on the adjacent tunnel structures.It takes a certain medium bridge in Huangpu District,Guangzhou,Guangdong as the research background.In response to two unfavorable factors of large-scale earthwork excavation above the tunnel and bridge pile foundation construction,3D modeling analysis is carried out using Midas GTS solid finite element software to study the unloading effect of earthwork excavation and the impact of adjacent pile foundation construction on the tunnel.The research results indicate that the construction of new bridge piles and the widening of river channels have an impact on the internal force and deformation of interval tunnel structures,both of which meet the requirements of regulatory control standards.The use of steel casing follow-up construction measures can reduce the impact of pile foundation construction on the structure of interval tunnels,but its main function focuses on controlling local disturbances and preventing adverse effects such as collapse of holes.
万方数据
维普
