TBM Working Principle

• What Is a Tunnel Boring Machine (TBM) and How Does It Work?

  Nov 12, 2025

    You use a tunnel boring machine to dig tunnels deep underground. It helps people dig in a safe and fast way. This big and modern machine is often called a TBM. It moves through soil and rock to make smooth tunnel walls. Many companies, like NHI, give these machines to projects everywhere. Today, the tunnel boring machine market is worth $7.50 billion. It is growing very fast.   Tunnel Boring Machine Overview   TBM Definition and Purpose A tunnel boring machine is a very large machine. It digs tunnels deep under the ground. People call it a TBM. The TBM has a spinning cutterhead. This cutterhead breaks soil and rock. TBMs are used for long tunnels. These tunnels can be for subways or water pipes. NHI is a top company that makes TBMs. They build them for big...

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