Madrid Metro Line 11 Tunnel Boring Machine Advances Rapidly 2026

The Madrid Metro Line 11 extension project has reached a significant milestone with the rapid advance of the tunnel boring machine named Mayrit. In just under two months, the machine has excavated 672.6 meters of tunnel and removed 46,676.2 cubic meters of earth, equivalent to filling about 19 Olympic swimming pools.

This progress marks a key phase in the expansion of the Madrid Metro network, which aims to improve connectivity across the city. The machine is currently working on the 5,227-meter tunnel section between the future Comillas station and Conde de Casal.

Mayrit's Impressive Excavation Stats

According to data released by the Consejería de Vivienda, Transportes e Infraestructuras, the Mayrit machine has been operating with remarkable efficiency. In less than two months, it has installed 389 of the 3,076 concrete rings that will line the tunnel.

Each ring consists of seven trapezoidal segments, known as dovelas, manufactured in Noblejas, Toledo, at a plant specifically built for this project. The rings are crucial for stabilizing the tunnel walls and ensuring the structural integrity of the underground passage.

• 672.6 meters of tunnel excavated in under two months.
• 46,676.2 cubic meters of earth removed, equivalent to 19 Olympic pools.
• 389 rings installed out of 3,076 total needed.
• 5,227 meters is the total length of the tunnel section.
• 150 trucks are used to transport the excavated earth.

How the Excavated Earth Is Managed

The tunnel boring machine uses a cutting wheel to break the ground, and the excavated material is transported via a network of conveyor belts that extend as the machine advances. These belts run through the future Comillas station to the surface, where the earth is dumped into a pit with a capacity of 8,500 cubic meters.

From there, backhoes load the earth onto a fleet of about 150 trucks that haul it away. This efficient logistics system ensures that the excavation process continues without delays, which is critical for keeping the project on schedule.

Comparison of Tunnel Boring Machine Specs

Why This Matters for Madrid's Infrastructure

The extension of Line 11 is part of a broader effort to enhance public transportation in Madrid and reduce traffic congestion. Once completed, the new line will connect key areas of the city, providing faster and more sustainable travel options for residents.

The rapid progress of the Mayrit machine is a positive sign that the project is moving forward efficiently. However, challenges remain, such as navigating underground utilities and ensuring minimal disruption to surface activities. The background to this story is set out in Madrid Metro TBM Mayrit Hits Palos de la Frontera Early. A related thread runs through Mayrit Tunnel Boring Machine Crosses Under Manzanares and M-30. Earlier coverage in China's Jiaoping No.1: The World's Largest Tunnel Boring Machine shows how the argument developed.

What to Watch Next

As the tunnel boring machine continues its journey, observers will be watching for further updates on its progress and any potential delays. The installation of the concrete rings will be a key indicator of the project's pace. A closer look at the same subject appears in Australia's 137-Ton Tunnel Boring Machine Needs 152-Wheel Truck. Anyone following the wider picture can start with Sydney Metro Line: 110km/h Speeds End Replacement Buses. The same theme surfaces in Sydney Metro Extension Opens: Long-Awaited Southwest Line Launches, which takes a different angle.

Additionally, the management of excavated earth will remain a logistical focus, with the fleet of trucks playing a vital role in keeping the site clear. The successful completion of this tunnel section will bring Madrid one step closer to a more connected and efficient metro system. Context on how this played out before sits in Madrid Metro Launches Retro Soccer Jerseys for World Cup 2026. A companion piece, ICC Prosecutor Says Court Makes Significant Progress Despite US, approaches the same subject from another angle.