Numerical Analysis of the Impact of Large-diameter Shield Tunneling Crossing under Riverbank Retaining Structures
How to ensure the safe crossing of large diameter shield tunnel through riverbank pile retaining structures is a key issue faced by coastal and waterway-rich cities when constructing tunnels.Taking the Shenzhen Wanghai Road Tunnel as an example,this paper analyzes the influence of large diameter shield tunnel construction on riverbank pile retaining structures through numerical simu-lation.The results show that:(1)The pile retaining structure begins to show horizontal displacement when the shield tunnel is excava-ted to a distance of 10 m from the pile.The horizontal displacement of the pile located above the tunnel edge is greater than that above the tunnel centerline,with a maximum displacement of 3.75 mm.(2)The vertical displacement of the pile retaining structure above the tunnel centerline is larger due to the excavation of more soil above the tunnel centerline.The maximum vertical displacement of the pile above the tunnel centerline is 7 mm,while the vertical displacement of the pile above the tunnel edge is relatively smaller,at 3 mm.(3)As the shield tunnel is excavated below the pile retaining structure,the displacement of the pile rapidly increases.As the shield tunnel is completely excavated below the pile retaining structure,the displacement of the pile stabilizes.The process of shield crossing the pile retaining structure needs to be closely monitored during construction.
large-diameter shieldrevetment pilecrossing construction from belownumerical simulation
万方数据
维普
