CPK has finalised the Retkinia chamber in Łódź, paving the best way for high-speed tunnel excavation starting in 2026.
Credit score: Centralny Port Komunikacyjny (CPK)
Work is progressing on CPK’s high-speed rail investments, significantly on Line 85, which is able to run via Łódź. A significant milestone has been reached with the completion of the Retkinia launching chamber, the start line for the tunnel boring machine (TBM) that may excavate Poland’s longest and widest single-bore railway tunnel.
The chamber, over 180 metres lengthy and 23 metres deep, options diaphragm partitions reaching 43.5 metres. It contains two underground ranges: the primary for technical techniques and the second for the monitor mattress. Excavation is ready to start by This fall 2026, with the Warsaw–Łódź part scheduled to open in 2032.
“The event of sustainable and environment friendly transport requires fashionable options. That’s precisely what we’ve utilized in constructing the Retkinia chamber – a key element of the HSR tunnel in Łódź,” stated Piotr Rachwalski, CPK Board Member for Railway Investments.
On the Fabryczna website, building is underway on the receiving chamber, which is able to function the TBM’s endpoint. Budimex has constructed 150 cm thick diaphragm partitions round a chamber measuring 22 by 30 metres and excavated to a depth of 26 metres. Jet grouting is getting used to separate the high-speed tunnel from an adjoining PKP PLK tunnel, with extra concrete and metal buildings now being put in.
Reinforcement works on the Łódź Cultural Centre are additionally nearing completion. Roughly 1,400 micropiles and jet grouting columns have been put in to stabilise the soil underneath the historic constructing. Metal bracing is being added to the northern wing, and dismantled areas are being rebuilt.
The tunnel will span 4.6 km and have a diameter of 14 metres, designed for trains operating in each instructions at speeds of as much as 160 km/h. Tunnel depth will vary from 23 to 34 metres. It should embrace 5 underground evacuation chambers, technical walkways, and complete fireplace security techniques.
To guard buildings alongside the route, CPK has commissioned structural assessments from Albraco. These surveys deal with security and load-bearing capability in city areas.
The total 480 km Y-line, linking Warsaw, the longer term CPK airport, Łódź, Wrocław, and Poznań, is anticipated to be accomplished by 2035.
