Geotechnics
Tunnels and underground constructions
- General contractor: ADIM Ouest
- Client: GTM Ouest
- Project Management: INGEROP/ANTEA GROUP/ENET DOLOWY
- Assignment: G2 & G4
- Total cost of work: €66k excluding tax
- Completion date: since 2013
PROJECT DESCRIPTION AND CHARACTERISTICS
The study carried out by GEOS Ingénieurs Conseils enters into the project of building a tunnel under the river Vannes, at the site known as Kérino, replacing the existing mobile bridge.
This route includes the construction of a 250m sub-fluvial cut-and-cover tunnel and two access hoppers.
ASSIGNMENT
GEOS Ingénieurs Conseils conducted the G2 project studies and geotechnical implementation supervision G4, within the meaning of standard NF P 94-500.
These studies particularly addressed the following points:
- Complementary geotechnical investigations,
- Note on general geotechnical assumptions,
- Analysis of slope stability for access hoppers,
- Evaluation of pumping flows both in the works and final phase,
- Evaluation of modules of vertical reaction,
- Supervision of the cofferdams’ Execution Studies.
