Sentence examples for tunnelling machine from inspiring English sources

Brunel's version of this — adapted by engineers ever since — was a giant tunnelling machine.

His tunnelling machine, nicknamed Big John, was a balky thing that at first could barely manage a metre a day.

To cut the rock, the tunnelling machine had to apply only about seventy-five bars of pressure to its cutting head — about a thousand pounds per square inch.

Using the model, the required position of the steering jacks in the tunnelling machine can be determined, given that the required parameters are known.

Engineers have used a tunnelling machine called Phyllis to dig through 6.8km (4.2m) of earth from Royal Oak in west London to Farringdon on the edge of the City.

Herrenknecht AG is now the largest maker of tunnelling machines in the world.

Five huge tunnelling machines are now working in west, east and southeast London with 5½ miles (9km) of tunnels now built.

And new pictures, released today, show the five tunnelling machines carving new paths under the capital, and remodelling old ones, some of which were first used in 1878.

Phyllis, named after Phyllis Pearsall, who created the London A-Z, is one of eight tunnelling machines digging beneath London's streets.

Elizabeth, one of the last tag team of Crossrail tunnelling machines, has made the first breakthrough into the City of London, 40 metres below ground under Liverpool Street.

* Sister tunneling machine Ada has also now completed nearly two miles (3km) of tunnels and western both tunnelling machines will complete their journey at Farringdon by the end of the year.