Date of Publication :8th May 2024

Abstract:Assessing the impact of tunnels in urban environments is indeed a complex problem, and traditional empirical methods can often be insufficient to provide accurate estimates of the ground movement induced by tunnel excavation. This is mainly due to the many factors involved, including soil geology, structure geometry. To predict ground movement (horizontal displacements and surface settlements), engineers often use advanced numerical modeling techniques that take into account soil characteristics, tunnel geometry and other relevant parameters. These models can be used to estimate ground movement at various depths and distances from the tunnel, which is essential for designing appropriate mitigation and monitoring measures. In addition, real-time monitoring techniques are often used during and after construction to detect ground movement and take corrective action if necessary. The study presented in this article deals with an important analysis of the results obtained from the 2D numerical modeling of the tunnel of the Algiers metro extension project, more precisely the section between the E-El Harach Center, Bab Ezzouar, and Algiers International Airport. The objective of the modeling is to evaluate the surface settlements and horizontal displacements in the vicinity of the tunnel.

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