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Milan’s new M4 Metro Line Tunnel Excavations Completed

Infra News - Published on Tue, 15 Sep 2020

Image Source: Milan M4 Metro Line Webuild
The first of two tunnel-boring machines involved in the construction of Milan’s M4 metro line reached the end of its journey on the central section of the line today by breaking through the wall of the site of the future Solari underground station. With the second TBM’s arrival a few days away, the machines have together excavated 620,000 cubic metres of earth along 9.2 kilometres for the line’s two parallel tunnels. The project employed 1,500 people, who were able to work during the COVID-19 lockdown thanks to the extraordinary safety measures deployed on site. Work on this strategic project for sustainable mobility led by the Webuild Group proceeds unabated in order to open the first section of the line between the Linate city airport and Forlanini FS station in the spring of 2021.

Commissioned by the City of Milan, the line is being built by mixed concession operator M4, which will also manage the line in which the city and a group of private partners led by Group are investors.

After the arrival of the second TBM in the coming days, both machines will be dismantled. The rails will then begin to be placed along the floor of the two tunnels, along with the installation of the electric power supply system and computer guidance system.

The excavation work, which reached a monthly production record of 540 metres, operated in a complex geological and geo-technical context. The complex management of 600 vehicle movements per day - 15,000 in a single month - in a densely populated city as well as the process of removing excavated material with a minimum impact on the quality of life of residents and merchants on a project with 56 work stations across the city centre highlights the Group’s commitment to reducing pollution during production.

The line will be 15 kilometres long with 21 stations, crossing in a mere 30 minutes the historic centre of the city. It will link the eastern part of the city where the Linate city airport is located with the San Cristoforo FS station to the southwest. Its intermodal connections with other lines will expand the city’s network of public transport to improve the environment and Milan more sustainable, taking some 16 million vehicles off the streets every year and reducing CO2 emissions by 30,000 tonnes a year.

Milan’s M4 metro line is the latest example of Progetto Italia, the Group’s initiative to help restart projects in Italy. Work on the project, begun by Salini Impregilo and Astaldi before they came together to create the Webuild Group, is proceeding in full respect of the deadline set by the client, maintaining a close rapport with the public institutions to guarantee employment on site and along the supply chain.

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Posted By : Yogender Pancholi on Tue, 15 Sep 2020
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