The company Doka provided the technical solution for the ambitious extension of Line 3 of the Madrid Metro. This project, managed by UTE METRO L3 (OSSA-AZVI-COTODISA), includes the construction of a 2.7km long tunnel and several new stations.
The key component of the solution is the Doka SL-1 system, a modular and versatile formwork system (Photo: Doka)
The Doka company team has implemented samonosivu oplatu for lining tunnels 1.4 km long. While she provided mobile wagon for carrying formwork tunnel construction using an innovative method that accelerated the work and increased safety.
The key component of the solution is Doka SL-1 system, modular and versatile formwork system designed specifically for applications that require high load capacity, such as tunnel construction. The SL-1 system can be easily adapted to different tunnel geometries and construction methods, providing a robust and reliable solution.
Its modular design allows for quick assembly and disassembly, significantly reducing construction time and operating costs. Thanks to its stable structure, the SL-1 system guarantees high safety standards, which makes it ideal for urban construction projects.
Details of the technical solution
Moving the wagons directly on concrete, even in curved areas: The SL-1 tunnel formwork with a length of 7.5m moves on steel wheels directly on concrete. The system includes a built-in rotary table for easy radius adjustment in curved sections. With this, the rails became unnecessary, costs were reduced, and the progress of the works was accelerated.
Logistics: With very limited space inside the tunnel and without interrupting construction activities, pre-assembly is done outside the tunnel. The wagon, connected to the SL-1 profiles via the concreting window, is then lowered through the shaft.
Economical formwork concept with vehicle opening and daily concreting cycle: SL-1 tunnel formwork uses SL-1 steel panels with integrated transverse reinforcements during concreting, eliminating the need for wall anchoring.
The supports can be easily removed with a forklift in 10 minutes, creating the necessary passage for vehicles. The performance of the system has been improved by using new hydraulic cylinders.
Pre-assembly was done outside the tunnel (Photo: Doka)
UTE head of the construction site, Gonzalo Soubrier, points out: “The biggest challenge for us was to ensure that the project met high technical standards with a strict schedule in an urban environment. We chose the company Doka because of their innovative formwork solutions and proven experience in the delivery of complex infrastructure projects. Their SL-1 system provided the robustness and flexibility we needed, and the expertise of their team was invaluable in overcoming the challenges of the project.”
Raul Eickelberg, Doka project manager, notes: “Logistics was one of the main challenges we faced due to the very limited space on the construction site. Coordinating deliveries and warehousing required precise planning and implementation. The modular design of our SL-1 system enabled efficient space management and ensured smooth operations despite tight constraints.”
The extension of Line 3 metro, as part of a wider initiative to modernize and improve the city’s public transport service, is crucial for Madrid residents, as it aims to improve connectivity and reduce congestion in the city.
Participation in this project is a significant reference for the Doka company and emphasizes its commitment to providing reliable, efficient and safe solutions. Careful planning and implementation with the use of advanced solutions ensured the rapid progress of the works while maintaining the highest safety standards.
The client of the Doka company expressed satisfaction with the planning, timely delivery and overall quality of the solution, emphasizing excellent price-quality ratio.
Source: www.gradjevinarstvo.rs
