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Martina (tunnel boring machine)

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Martina (tunnel boring machine)
Class overview
NameMartina
Builders Herrenknecht AG
OperatorsFlag of Italy.svg  Italy
Cost US$ 60 million (2011)(equivalent to US$82.3 million in 2024) [1]
In service2011-2013
Completed1
Retired1
History
Italy
NameMartina
Builder Herrenknecht AG
CommissionedAugust 2011 [2]
FateDisassembled after July 29, 2013 [2]
NotesThe largest hard rock tunnel boring machine ever built
General characteristics
Class & typeS-574-type Tunnel boring machine
Tonnage4,500 tonnes (4,400 long tons; 5,000 short tons)
Length130 metres (430 ft)
Beam15.62-metre-diameter (51.2 ft)
Installed powerTotal: 18 MW (24,138.4 hp)

The Martina tunnel boring machine (officially named as the S-574. [2] ) is a hard rock tunnel boring machine built by Herrenknecht AG. It is the largest hard rock tunnel boring machine in the world and has been used for drilling the Sparvo Tunnel, a part of the larger Variante di Valico project in Italy. [3]

Contents

Specifications and operations

The Martina cost 60 million USD, [4] has a shield diameter of 15.55 metres, an excavation diameter of 15.62 metres, a length of 130 metres, a total weight of 4500 tonnes and an annual operating consumption of 62 million kWh. The cutterhead required 12,000 kW of power whilst the overall vehicle requires 18 MW total installed capacity to function. [2] [4] The machine started work on the Sparvo tunnel in 2011, with drilling of the 2430-metre north tube completed in 2012. The drilling of the 2600-metre south tube was finished in 2013, bringing the 5-kilometre tunneling project to an end. [5] [6] [7]

See also

References

  1. ↑ Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth . Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the MeasuringWorth series.
  2. 1 2 3 4 "Galleria Sparvo". Herrenknecht AG.
  3. ↑ "A Herrenknecht giant reaches its target". 17 May 2016.
  4. 1 2 "5 Biggest Tunnel Boring Machines in the World". ASME.
  5. ↑ "TBM Martina ended Sparvo tunnel - tunnelbuilder.com News".
  6. ↑ "Significant breakthrough at Sparvo - TunnelTalk".
  7. ↑ "Toto Costruzioni Generali".
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