Oral Presentation

¹Mostafa Abdou; ²AbdelMageed Kabasy; ³Ibrahim Youssef Ahmed Hassan

¹Professor, Faculty of Engineering, Assiut University, Egypt

²Assistant Professor, Faculty of Engineering, Assiut University, Egypt

³civil engineering, faculty of engineering, Assiut university

Tunneling activities in urban areas are always associated with surface and subsurface ground movements. Studying the stability of nearby structures and utilities after tunneling is a necessity to avoid any possible damage according to the excess settlement during and after tunneling. This study focuses on the settlement of raft foundation according to tunneling activity using single and double tunnels. 2D numerical model was conducted to simulate the excessive settlement of raft according to tunneling. The effect of tunnel depth, soil consistency and spacing between double tunnels is studied. By increasing the soil cover above the tunnel crown, the settlement and bending moment of raft increases regardless the relative density of surrounding soil.

Tunneling activities in urban areas are always associated with surface and subsurface ground movements. Studying the stability of nearby structures and utilities after tunneling is a necessity to avoid any possible damage according to the excess settlement during and after tunneling. This study focuses on the settlement of raft foundation according to tunneling activity using single and double tunnels. 2D numerical model was conducted to simulate the excessive settlement of raft according to tunneling. The effect of tunnel depth, soil consistency and spacing between double tunnels is studied. By increasing the soil cover above the tunnel crown, the settlement and bending moment of raft increases regardless the relative density of surrounding soil.

Tunneling; Tunnel crown; Ground surface settlement

Structural and Construction Engineering