Development of a Permeable Removable Urban Pavement
Résumé
Modular concrete pavements have been developed during the last years, for urban applications. Within this family of pavements, Eiffel University proposed the concept of removable urban pavement (RUP) whose purpose is to ensure an easy and fast access to the sub-base and to the networks underneath, for maintenance or extension needs.
Two RUP prototypes were tested during more than 10 years: one made of independent concrete slabs and the other with interconnected slabs. The second concept proved to be more resilient to traffic. Based on this experience, Eiffel University, in collaboration with Eiffage Infrastructures and Alkern companies, has been developing since 2017 a new type of RUP, which is also permitting high water drainability during rainfall as this property is becoming more and more pregnant in a context of climate change and violent climatic events.
The present paper first describes the concept of permeable RUP and the consequent design of concrete slabs in terms of mechanical and hydraulic behavior. The developed slabs are multi-layered: the top layer is made of porous concrete, while the base layer is made of plain concrete to ensure the durability of the structure.
After laboratory studies, a 3x9 m2 prototype made of 39 slabs was submitted to 200 000 wheel passages on the accelerated traffic simulator available at the Eiffel University. Based on the good behavior obtained, a 200 m2 demonstrator was constructed in Nantes Metropole in 2022 and submitted to real traffic. The paper describes the different development steps.
Domaines
Génie civilOrigine | Fichiers produits par l'(les) auteur(s) |
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