China-developed tunnel boring machine (TBM) is getting larger! The 12.79-m-diameter TBM "Jinxiu," boasting the widest diameter in the country's earth pressure balance shield machine, made its debut in high-speed rail construction at Chengdu-Zigong #highspeed railway on Monday. | People's Daily, China

How does Tunnel Boring Machine (TBM) work? A Tunnel Boring Machine (TBM) is a specialised piece of equipment used to excavate tunnels through various types of soil and rock. It works by using a rotating cutter head with sharp disc cutters or tools that grind away the material in front of it, creating a tunnel of a precise diameter. As the cutter head rotates, the TBM simultaneously removes excavated material through a conveyor system and supports the newly created tunnel walls with precast concr

Tunnel Boring Machine (TBM) is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. There are different types of TBMs used in different ground condition. TBM selection is an important stage during the early stage of project and prior to construction. TBM should be designed in accordance with specific site requirements. Geology and ground water condition play an important role in TBM selection. Follow us at tunnel.engineering #tbmselection #t

A TBM breakthrough is the moment when the Tunnel Boring Machine completes its excavation by emerging at the tunnel’s endpoint. It is a critical milestone in tunnelling. This event marks the transition to subsequent phases and demonstrates that key technical and logistical challenges have been overcome. You can learn TBM tunnelling and other tunnelling methods in our Online Tunnel Engineering course from the comfort of your home. Click the link below to learn more and complete your registration.

Our giant tunnel boring machines are making steady progress underground, digging 24 hours a day to build the future Metro Tunnel. And they’re not the only ones working around the clock. Come take a rare look from inside the cabin and meet one of the operators behind the (figurative) wheel. 🧐 This is the first of our Digging Deeper series, where we give you are more in depth look at how we are building the Metro Tunnel. Let us know what you think in the comments! | Metro Tunnel