This bridge will create a safer and faster route for more than 180,000 vehicles/day, which will ease the city's traffic. It will also include a bicycle lane of more than 3.6km.
One of the most relevant requirements in this project has been the versatility of the systems and the safety of the operators. To this end, the engineering team developed an integrated solution with the ideal formwork and scaffolding systems and applications for the pylons and the roads that run between them. The Queiroz Galvão construction company has once again trust in ULMA's engineering solutions, as well as in the capacity to respond to a project with stringent execution deadlines.
The ATR self-climbing system was chosen for the two pylons with variable inclination and four-sided section, in combination with the VMK timber-beam formwork for the outside and the KSP platform for the inside. The self-climbing system has been perfectly adapted to the inclination and elliptical curve of the shaft of up to 23º in the last concreting. The whole set has allowed high execution rates, three-day concreting cycles in 3.6m high sections, without the need for a crane. In addition, it has three levels of working platforms for carrying out work on the formwork, rebar or concrete, as well as for lifting the structure, maintaining strict safety levels at great heights at all times. The platforms were designed in such a way that it was possible to regulate the angle to maintain horizontality as the arch progressed. Despite the complexity of the geometry, the MK system has solved all the structural requirements.
With regard to productivity, the use of self-climbing formwork halves working times compared to a conventional climbing system in this type of project. This is because the system requires less handling. As the movement is carried out using a hydraulic system, there is minimal use of the crane, which is freed up for other tasks.
The two carriageways rest on an X shape. They were built with ENKOFORM HMK, supported by T-60 shoring towers. A solution of MK gantry formwork was proposed for the rest of the board to avoid closing the tracks.
For the construction of the arch section of the bridge, a supporting structure made of MK and VM beams supported by T-60 shoring systems was constructed. Custom metal profiles bear all the weight of the T-60 shoring system.
To access the different areas of the bridge, BRIO stairs were enabled on each side of the arch and in two separate sections. The first section is 60m-high and rests on the ground. The second section, 40m-high, consists of three independent staircases arranged on BMK consoles on the arch.
Constructor: QUEIROZ GALVÃO CONSTRUCTION COMPANY.