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What lies beneath: Crossrail up close

Words: Simon Wicks
Crossrail tunnel boring machine Victoria

On 26 May tunnellers working on the huge Crossrail project beneath the streets of London made their final breakthrough, at Farringdon. After three years and 42 kilometres of boring, tunnelling is complete. The Planner’s Simon Wicks was invited to take a look at what’s happening beneath Farringdon

The machines

Eight tunnel-boring machines (TBMs) have been used on the Crossrail project, each given, by tradition, a woman’s name. The machines weigh in at approximately 1,000 tonnes and are designed by maker Herenknecht to deal with complex geology; six have been built to bore through London clay, sand and gravel; two shorter TBMs (110m) were ‘slurry’ mac.....Sign Up or Login to read full article

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