Abstract
This paper deals the analysis of the behavior of an underground saline cavity under the cyclic load due to traffic landing gear from the Boeing 747-400 airplane using the pseudo static approach. This cavity was located at a depth of 2.5 m from the free surface of the second runway at Es-Senia airport in Oran (Algeria). Where, this airstrip is built in very complex geotechnical conditions, which several cavities are formed by dissolution of gypsum, have been observed during the geological investigations. In-situ geotechnical studies and experimental tests carried out in the laboratory have permitted to identify the hydromechanical behavior parameters of the great Sebkha soil of Oran city. The Oran airport base is composed of a mixture of clay and silty gypsum sand with an overconsolidated behavior.
This article focuses on numerical modeling of the second airstrip of Oran airport. This modeling was performed using the finite difference software Flac3D (v.3.1), while assuming that a spherical subterranean cavity is located 2.5 m deep. The obtained results have allowed representing the real behavior of the underground cavity and that of the runway under the action rear main landing gear of the Boeing 747-400 considering only the poromechanical behavior in this part of study.
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Acknowledgments
The authors would like to thank the head civil engineering team of the PRISME laboratory at the University of Orleans in France for allowing us to use their Version software Flac3D (V3.1).
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Chikhaoui, M., Nechnech, A. (2019). Poromechanical Behavior Analysis of an Underground Cavity Below Runways Under the Dynamic Cyclic Action of Landing Gear on Complex Geotechnical Conditions. In: Badr, M., Lotfy, A. (eds) Sustainable Tunneling and Underground Use. GeoMEast 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-01884-9_6
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