Construction Risk Assessment on Shallow-buried and Biased Tunnel under Rich Surface Water Passing though Floodway Area

For the characteristics of shallow-buried and biased tunnel under rich surface,where Jiangmen tunnel passing though the Yulonghu floodway area,definited risk source during tunnel construction,established a risk assessment model of tunnel construction process to assess the construction risk of tunnel under Jiangmen rich surface water conditions shallow-buried and biased area.