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MILAN M1 SUBWAY: EXTENSION TO RHO-FIERA EXHIBITION CENTRE

… subway extension to “Rho-Fiera Exibition Centre” in a difficult geotechnical and hydrogeological context …

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The extension of the Milan Subway to the Rho-Fiera Exhibition Centre involved the execution of some bored and cut-and-cover tunnels, for a global length of 2.1 km, and 2 underground stations in difficult geotechnical and hydrogeological context.

The work was found to be extremely complex for the presence of incoherent soil (sand and gravel) in a variable hydrogeological context with water table level.

Some main conflicts and the crossing of sensitive areas from the point of view of possible construction impacts complete the project framework: residential built areas, the Olona River, the A4 Milan-Turin motorway, the Milan-Turin railway line and various settlements in the industrial area within the Municipality of Rho.

The most part of the bored tunnels were excavated by mean of a “mechanized” excavation system, using an EPB-Shield. Some minor bored tunnels were built using a conventional tunneling system with a partial-face excavation. Cut-and-cover tunnel and shafts were excavated using a diaphragms support system. Watertightness was assured by mean of jet-grouting and low-pressure injection systems.

Andrea Antiga, as Maire Engineering (nowadays Tecnimont S.p.A.) Project Coordinator was responsible for the management of the detailed and “for construction” design and for technical assistance during construction of civil structures.

OWNER

MM S.p.A. - Milan’s Municipality

LOCATION

NORTHERN ITALY

YEAR

2003 - 2005

CLIENT

Andrea Antiga worked as Technical Coordinator at MAIRE ENGINEERING (designer company in the Contractors Group)

PROJECT VALUE

117 Mio EUR.

TYPE OF WORK

Tunnel, EPB excavation, underground station, special geotechnical works, diaphragm wall, monitoring

PUBBLICATIONS

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