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Łódź high-speed rail tunnel construction

Updated 5 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-04 22:05 UTC → 2026-09-12 08:04 UTC · added removed

Construction of the High-Speed Rail (KDP) tunnel in Łódź, Poland, has progressed through several technical milestones. Following the completion of reached a specialized concrete ‘cradle’ at significant logistical milestone with the Retkinia launch chamber—a three-week continuous operation involving an international team of specialists—assembly arrival of the first all major Tunnel Boring Machine (TBM) components is underway. In August 2026, crews installed a 35-ton sealing ring components. Following the earlier arrival of six components, the final and largest piece—a 145-ton cutting shield measuring 8.4 meters in diameter—has been transported from the Herrenknecht factory in Schwanau, Germany, to the Retkinia starting chamber with a precision tolerance of ±5 millimeters. According to Maciej Dutkiewicz chamber. With the full set of components on-site, specialists from the Port Polska press office, construction company PORR are set to begin the ring is essential for controlling ground assembly and groundwater pressure to prevent ‘uncontrolled ground subsidence’ during drilling. As testing of early September 2026, TBM assembly has advanced with the arrival of six machine. The TBM is a central element of the seven massive components required for the cutting head. The machine’s cutting wheel features six arms, each weighing approximately 40 tons, while technicians are assembling shield segments weighing between 50 and 65 tons to house hydraulic propulsion cylinders. A specialized segment 4.6 km tunnel project, which is also being prepared for an auger conveyor to transport excavated material. The project involves excavating an underground route part of the broader ‘Y’ infrastructure initiative designed to connect Warsaw and the Retkinia starting chamber new airport with Łódź, Wrocław, and Poznań. The machine is intended to a receiving chamber at ensure high precision and minimize surface impact during the Łódź Cultural Center. While previous estimates suggested a 6km tunnel, recent details specify a 4.6 km route. Excavation excavation process. Drilling is scheduled to begin commence in the spring of 2027, following the completion of machine assembly and technical testing. 2027.

Versions

  1. 2026-09-12 08:04 UTC Łódź high-speed rail tunnel construction
  2. 2026-09-04 22:05 UTC Łódź high-speed rail tunnel construction
  3. 2026-09-03 07:35 UTC Łódź high-speed rail tunnel construction
  4. 2026-08-26 15:34 UTC Łódź high-speed rail tunnel construction
  5. 2026-08-22 10:02 UTC Łódź high-speed rail tunnel construction
  6. 2026-08-18 07:38 UTC Łódź high-speed rail tunnel construction

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