IP4 (A4) - Marão Tunnel

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Type

Transports

Local

Portugal

State

Finished

Year

2014

Client

FERROVIAL AGROMAN

IP4 (A4) - Marão Tunnel

- Tunnel about 5,650 m long that consists of two parallel one-way tubes (North tunnel and South tunnel), making up a total of 11,300 m. Each tube consists of two lanes, with horizontal clearance of 9.8 m and vertical clearance of 5 m. The maximum covering of the tunnel is about 540 m. Project development involved dealing with works that were partially carried out, but had been suspended for about 2 years. There was a 7,000 m long excavation and primary supports in place. This project concerns the completion of the tunnel. Given its specific situation, in addition to all standard studies, we needed to proceed with a characterisation of the current status of works, analyse all the existing monitoring and develop repair and rehabilitation projects. 

- Geological and geotechnical studies, environmental studies, characterization studies of the status of works, structural study, structural study of portals, monitoring plan, and safety and health plan in the scope of the basic design to put out for tender.