📋 Tender Overview
The starting chamber of the large TBM shield has reached its target depth of 30 m. A chamber for small TBM and departures from underground routes is under construction. Tunneling machines are installed. The investment for over PLN 1.7 billion in Lodz by PKP Polskie Linie Kolejowe SA will increase the capacity of railways in long-distance regional and agglomeration routes. The project is co-financed by the EU funds of OPI E. The National Railway Program worth nearly PLN 76 billion includes among others projects that increase the possibilities of rail travel in the areas of the largest railway junctions.Improvement of the d Railway Junction is an investment co-financed from European Funds which will have a significant impact on the development of the agglomeration and the entire region. This tunnel will also connect Poland thanks to better conditions for faster journeys by long-distance trains - said Waldemar Buda deputy minister of funds and regional policy. Underground rail connections from d Fabryczna station will significantly increase the number of trains and the travel offer.The construction of railway tunnels in d is another step towards increasing the possibilities of the d railway junction and fully using the railway potential. The investment which places high demands on contractors and involves the latest technology meets the objectives of the National Railway Program i.e. providing an attractive more accessible travel offer in agglomerations and on the national and international railway network - said Arnold Bresch member of the Management Board of PKP Polskie Linie Kolejowe SAThe contractor is preparing the starting chambers for the large and small TBM Tunnel Boring Machine. The investment is carried out simultaneously in several places. In the area of ul. Stolarska and Odolanowska the round structure of the eastern shaft reached a maximum depth of 30 m. From this chamber a large shield 13 m in diameter will begin to drill a double-track tunnel towards the d Fabryczna station. More than 20000 m3 of soil has already been extracted from the shaft. In the next stage the contractor will prepare the so-called a bottom plate approx. 2 m thick and 30 m in diameter.Diaphragm walls are concreted in the western shaft for the smaller TBM. At the same time the machines are working on the construction of a connector between the eastern shaft for a large TBM and the west shaft for a small TBM.The contractor also works at the location at ul. Dlugosz. The teams make diaphragm walls of the excavation. This is the place from which the smaller shield will move towards ul. Carpentry. Another construction site is near ul. Skarpowa where the single-track tunnel to abieniec d will end. The construction of the chamber has already started. Specialized equipment is involved as in other locations.Reactivation of the mechanical molesAfter the machines were checked and accepted at the manufacturers premises the TBM disassembled into parts arrived and came from Germany to d. The assembly of the mechanical moles progresses along with the work on the chambers. The complex shields will begin to drill tunnels after the starting chambers are prepared. The first works are scheduled for December. A large machine with a diameter of over 13 m and a length of 110 m will construct a double-track tunnel with a length of 3 km and a diameter of 12.7 m - the section from ul. Odolanowska to d Fabryczna.The smaller shield will drill 4 single-track tunnels with a total length of about 4.5 km and a diameter of 8.5 m. The drilling is planned to start from the area of ul. Dugosza towards ul. Carpentry. The machine will then turn over and start working at the d abieniec station.The tunnel lining is already in production. Near Mszczonw production of 30000 tunnel casing elements the so-called tubings. More than 100 elements can be created on a special belt every day. They will be successively transported to the construction site. More information about tubings httpswww.plk-sa.plbiuro-prasoweinformacje-prasowekolejowe-podroze-w-tubingach-ruszyla-produkcja-elementow-tuneli-w-lodzi-4854In parallel to the activities on construction sites design works are being carried out on the underground stops d Polesie and d rdmiecie. The contractor includes in the project an additional third stop d Koziny working name.Construction of railroads using the TBM methodThe TBM technology used in the construction of tunnels consists in simultaneous boring and construction of a tunnel. The disc of the mechanical mole rotates 3 times a minute and grinds the soil which is constantly brought to the surface. As the disc moves a space is created in which subsequent tubing rings are placed. Within 24 hours the machine can lay about 10-15 m of the tunnel lining. The TBM design prevents ground subsidence and vibrations and minimizes collisions with urban infrastructure.Tunnel in d - good rail connections in PolandThe construction of the cross-city tunnel is a continuation of the works commenced with the construction of the d Fabryczna station. The investment will ensure an effective system of interregional rail connections and a faster connection through the city center. The d Fabryczna station will become a transit station from the final station. Regional and long-distance trains will be able to travel through the very center of d - on the east-west axis via d Widzew Fabryczna and Kaliska stations and on the north-south axis via d Widzew Fabryczna abieniec stations. As part of the project new stops including d Polesie and d rdmiecie which will be integrated with public transport and will facilitate everyday travel for residents.
