Type of work

Tunnels

Aguas Santas Tunnel

Portugal

Construction of the new tunnel in Aguas Santas, in the Aguas Santas / Ermesinde sub-section of the A4 - Porto / Amarante highway

Construction of the new tunnel in Aguas Santas, in the Aguas Santas / Ermesinde sub-section of the A4 - Porto / Amarante highway

Description

The project, located in the municipality of Maia, consists of the construction of a new gallery, with an extension of 367m, to the north of the two existing ones, downwards (Ermesinde / Porto), including the expansion and improvement for 2x4 roads.

The main activities include:

  • Excavation (explosives and mechanical means).
  • Temporary excavation support (shotcrete with metallic fibers.
  • Swellex nailing, metal crankshafts, micro-pile tapping, fiberglass nailing).
  • Waterproofing and drainage (2mm PVC geotextile and membrane).
  • Ultimate reinforced liner.
  • Electromechanical installations (lighting, ventilation, fire extinguishing system, CCTV).

Responsible

Being a work of great social impact, all the principles of good construction rules and greater care in monitoring existing buildings in the surroundings.