"A three-dimensional numerical approach was considered essential to study correctly the complexity of the problem. "
"In spite of some mesh difficulties related to the complex intersection between different structures, PLAXIS 3D has been successfully applied to meet different objectives requested by the client (RATP)"
The project involves creating two new accesses to the existing station “Mairie des Lilas” on Line 11 of the Paris metro.
Originally commissioned in 1937, the station was excavated in underground with a cover of about 17 m under the street “Boulevard de la Liberté” and anchored with piles. Line 11 will be extended and transition from 4 to 5 car metros so new accesses must be created. TERRASOL was solicited by RATP for the realization of the Geotechnical Study Design.
The work concerns the realization of shafts from the surface, from which underground tunnels will be excavated to intersect existing structures (tickets room, halls, underground station) and create additional exits.
Two PLAXIS 3D models were created to simulate the construction of the principal and secondary access to assess the effects on structures and roads at the surface level as well as the existing underground structures.
Software: PLAXIS 3D AE
Location: Paris, France
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