Communication science et technologie
Volume 21, Numéro 2, Pages 27-43
2023-12-25
Modeling Of The Construction Of An Underground Tunnel In A Saturated Ground
Authors : Louadj Samia . Saadi Menad .
Abstract
The construction of tunnels in aquifer areas has always posed problems for geotechnicians during digging or during operation of the structure. The risks linked to the stability of the contour of the tunnel are essentially due to the poor characteristics of the ground in place and a danger of loosening under strong hydraulic gradients is to be feared. The development of digging methods permitted to engineers to be able to better anticipate the movements generated in the surrounding soils, and the construction of tunnels in this type of terrain has become possible. The purpose of this work is to model the behavior of a circular tunnel built in saturated soil with the aim of investigating the method that would be suitable for its construction. Two digging methods are proposed and consist of using the tunnel boring machine and the new Austrian method (NATM). The analysis is carried out while respecting the construction stages to compute the forces and moments that develop in the final concrete liner over the long term.
Keywords
Tunnels; Aquifer Zones; Drying Wells; NATM method; Tunneling
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