PERI Formwork Systems, Inc., Projects - Viaduto Duarte Pacheco in Lisbon, Portugal

Scaffolding Construction

PERI Formwork Systems, Inc., Projects - Viaduto Duarte Pacheco in Lisbon, Portugal PERI Formwork Systems, Inc., Projects - Viaduto Duarte Pacheco in Lisbon, Portugal PERI Formwork Systems, Inc., Projects - Viaduto Duarte Pacheco in Lisbon, Portugal

Viaduto Duarte Pacheco in Lisbon, Portugal



Suspended scaffolding with 25-metre span above moving traffic: PERI UP modular scaffolding

The Viaduto Duarte Pacheco is the largest and most important viaduct in Lisbon, Portugal. As an integral part of one of the main roads through the city, it also connects the city with Monsanto Park where the Lisbon-Cascais motorway begins.

After 40 years of service, a fundamental concrete renovation was necessary in order to preserve the functionality of this impressive structure. In order to renovate the viaduct the PERI UP scaffold system was chosen. It will allow access to all levels and ensure a safe work environment for the crews at all times. The situation was complicated by the fact that the traffic flow underneath the viaduct should remain uninterrupted during the entire project.

PERI Portugal was awarded the contract for supplying and installing all scaffolding requirements. After a comprehensive analysis, PERI scaffold specialists designed a practical and cost-effective solution on the basis of the PERI UP scaffolding kit.

PERI Systems In Use
  • PERI UP Rosett
  • PERI UP T 70 / T 100 Frame scaffolding
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    PERI UP T 70 frame elements were used on the abutments which provided the maximum safety during assembly and dismantling. This new type of frame construction (T-form) guarantees the necessary protection without the need of additional parts or assembly measures. This ensures that the scaffolding crews are safeguarded against falling at all times.
    PERI UP Rosett with its high ledger rigidity was chosen for the arches whereby the scaffolding was suspended along the viaduct column area. Here, the distance between the piers which support the columns was 18 metres in length.
    The basic concept was that the piers were to be “wrapped” with suspended scaffolding up to the middle of each span. For other scaffolding systems on the market this would not have been possible. This was an important factor in PERI being awarded the contract.
    Thanks to the high node rigidity of the PERI UP Rosett, the scaffolding could be erected to the geometric form of the construction. All of this could be achieved without interrupting the flow of traffic on the roads below.
    The scaffolding system for the main arch of the viaduct proved to be the most demanding problem for the designers. At this position, the six-lane highway is crossed with a span of more than 25 metres. Likewise, using PERI UP Rosett and exploiting all the system´s advantages for an extremely favourable load distribution, the PERI specialists succeeded in adapting the suspended scaffolding to the arch geometry. At the same time, over 90% of the materials required were available from the standard PERI scaffolding product line.
    PERI has supplied the contractor with a custom-made scaffolding solution which provides optimal and safe working conditions during the renovation of this important structure. The logistics organisation regarding scaffolding availability was also a key factor in the success of this project. The plan ensuring optimal utilization of equipment on site allowed the contractor to meet the intended schedule.
    Field Service: PERI Portugal
    Field Service: PERIcofragens Lda. Cofragens e Andaimes, Portugal
    PERI Press Report April 2003