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The Project 


The project for rehabilitating the Part-Dieu station area involves major restructuring work:

  • Remodeling and expanding the railway station,
  • Creating a new station platform,
  • Building a high-rise building (the ToLyon skyscraper),
  • Creating a four-level basement under Place Charles Béraudier.

 

This new underground infrastructure includes:

  • a first basement with a public area for multimodal exchanges (a 1,500-stand bike park, taxi ranks, access to the underground rail system and shops) opening onto Place Béraudier,
  • a three-story car park with a total capacity of 1,000 vehicles,
  • underground access roads,
  • extending and upgrading a tunnel in line with regulations.

The car park, built entirely below the water table, is situated in a watertight enclosure with diaphragm walls.
The first basement level meets demanding architectural requirements to create a high-quality public area.
The construction work will use the top-down method to manage the constraint of maintaining access to the station at all times and freeing up rights of way to the related construction sites as quickly as possible.

Challenges


Project owner
SPL Lyon Part-Dieu

Period
2015 – 2022

Architect
SUD Architectes

Key figures
Car park surface: 39,000 m²
4-level basement: 1,000 parking spaces on 3 levels
Public area in the first basement for multimodal exchanges

Challenge
This project involves strong interfaces with related projects and a dense urban environment. A concrete cover slab supporting the station extension and the landscaping in the public area, an adjacent high-rise building, the need to maintain access to the station, and highly populated existing buildings remaining open throughout the construction work all make this an exceptional project.

The Assignment


The consortium’s assignment includes managing the entire underground infrastructure, as well as coordinating and managing the interfaces with the related projects (railway station, high-rise building and outside public spaces).

setec als is in charge of:

  • project management,
  • interface management and coordination;
  • designing the molded watertight enclosure and its inner structures.