Tunnel boring machines: What to know about the machines

The tunnels themselves are not the biggest concern of tunnel boring machines (TBM) that are being used to build tunnels for the first time.The biggest issue, of course, is the cost.“We’re trying to solve problems that we have,” says Daniel A. Gartman, director of the Tunneling Systems Laboratory at the National Institute of Standards and […]

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When New York tunnels open, it’s not about the new tunnels but about the old tunnels

The New York subway is in the final stages of opening its underground stations and tunnels, marking a milestone in a decades-long process that began with the construction of the Empire State Building and has since taken on the appearance of a massive undertaking.The opening of the stations and underground stations is expected to bring […]

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