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(WAVY) — The tunnel boring machine known as Chessie broke through ... made up of Dragados USA and Schiavone Construction Company LLC, is the design-build contractor for the project, with the ...

Gaur told PTI that the 9.69-m diameter Cabrera tunnel in Spain was built by a Double Shield tunnel boring machine at an average ... Rishikesh-Karanprayag rail line has a diameter of 9.1 metres ...

Tunnel Boring Machine (TBM) named 'Disha' achieved a major breakthrough on Thursday by completing a vital segment of the underground tunnel for Metro Line 7A. The milestone was celebrated in the ...