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13 Comments

  1. i can think of more subtle ways of killing my enemies than pursueding them to stand in a line while i creeep up behind them with a huge drilling machine, but sure, lets go with that.

  2. Move like a jellyfish
    Rhythm means nothing.

    …but more on topic: sweet Jesus that is a huge tunnel boring machine.

  3. I just caught a discovery show about this boring machine. It’s being used in Spain to carve a tunnel (and a second later) that has a 3-lane road with a second single service lane beneath it.
    Twice the diameter of the previous largest borer and the red/yellow sections rotate in opposite directions to keep the thing from turning over in the tunnel.

  4. @8

    Just don’t put it up for a vote. Sneak it into Safeco in the dark of night, no one will know the difference till it emerges at the Elephant car wash.

  5. It’s not a tunneling machine – it’s a ‘sky blueifier’, to pump beautiful blue gradient into an otherwise drab, overcast sky.

  6. It’s not a tunneling machine, looks like it’s an experimental ‘sky blueifier’ – to pump beautiful blue gradient into an otherwise drab and overcast sky.

  7. Well I wanted to find out more…damn you for not giving us a link:

    In September 2004 MHI-Duro Felguera SA, a joint venture between Mitsubishi Heavy Industries Ltd (MHI) and Duro Felguera SA, received an order to supply the world’s largest Earth Pressure Balanced (EPB) Tunnel Boring Machine (TBM), with a diameter of 15m (4,000t, 160m long) and an advance rate of 0.665m/min, to Dragados-FCC UTE of Spain.

    Design work on the equipment was performed by MHI and manufacturing was carried out by Felguera Construcciones Mecánicas SA. The machine fabrication was completed in July 2005.

    The EPB tunnelling machine was used for construction of the south tunnel of the south bypass on the Madrid M30. This was of course only one of the seven machines used to carry out the tunnelling excavation for the 15 projects of Madrid Calle 30.

    Six more machines were used with various different requirements. Most were 15m cutting diameterweighing 4,000t and built by Herrenecht of Germany, but one was configured to cut a dual-lane tunnel 12m in diameter.

    All of the machines used an earth pressure balance shield system, since most of the excavation was in soft ground (little hard rock). The segment erectors were configured to line tunnels with 70cm-thick segments of concrete although some sections were double lined with a second segmental ring to act as a safeguard against fire – this required a second segment erector on the TBM.

    The inner diameter of the tunnels was 13.45m after lining. Flygt supplied pumps for use behind the tunnel boring machine shields on the project (two pumps for water and three more to pump lubricant foam to the cutting heads).

    http://www.roadtraffic-technology.com/projects/m30_madrid/

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