E3S Web Conf.
Volume 150, 2020The Seventh International Congress “Water, Waste and Environment” (EDE7-2019)
|Number of page(s)||5|
|Section||Geosciences and Environmental Culture|
|Published online||12 February 2020|
Seismic analysis of the zaouiat ait mellal twin tunnels of Agadir motorway (Morocco)
1 Mechanics and applied mathematics department, Industrial and Seismic Engineering research team,National School of Applied Sciences of Oujda,Mohammed First University, Morocco.
2 Continuum Mechanics and Structural Analysis department, Carlos III University of Madrid, Spain.
3 Laboratoire de Géoressources, Géo-environement et Génie Civil (LGGG), Faculty of Sciences and Technologies of Marrakesh, Cadi Ayyad University, Morocco
4 LGCE, Ecole supérieure de technologie de Salé, Mohammed V University, Morocco.
5 Laboratoire Public d’Essais et d’Etudes LPEE de l’oriental, Morocco.
6 Sener Ingerieria y Sistemas S.A, Spain
* Corresponding author: firstname.lastname@example.org
Underground structures, such as tunnels, are vital for ensuring all kinds of transportation; and being buried under the surface makes them exposed to soil dynamics. Added to the moderate seismic activity in Morocco, the stability of tunnels is put to the test. This paper examines the interaction between the ZAM (Zaouit Ait Mellal) twin tunnels between the cities of Marrakesh and Agadir, using the Difference Element Method provided by FLAC 2D software. The acceleration is introduced as the one related to the historic event of El centro 1940 with free-field boundary conditions in the numerical model, with three configurations: tunnel 1 without tunnel 2, tunnel 2 without tunnel 1 and tunnel 1 with tunnel 2. The results of the simulations indicate that the differences values of the maximum displacement, axial force and bending moment on structural elements are very noteworthy from the configuration of the tunnel (single) to the twin tunnels in order to prove the interaction between these latter under seismic loading.
Key words: ZAM twin tunnels / finite difference method / seismic loading / Free filed boundary / displacement / Axial force / bending moment
© The Authors, published by EDP Sciences 2020
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