Construction World May 2015

FORMWORK AND SCAFFOLDING

RECORD-BREAKING formwork With a length of 144 m and a width approaching 23 m, the Place des Martyrs metro station boasts some very impressive dimensions. In addition, the entire 1,7 km long extension of the The PERI UP working scaffold has been optimally adapted to suit the imposing cross-sectional geometry of the station´s arched form and is used to execute the waterproofing and reinforcement work in advance. (Photo: PERI)

Algiers metro system runs under historic ground. For this project, an international team of PERI engineers designed economically optimised tunnel formwork solutions, tailored to meet the varying requirements.

The northernmost, but also most central as well as closest-located point to the harbour area, of the extensive metro expansion meas-

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ures is the Place des Martyrs station. The arch-shaped stop is 144 m long and 23 m wide – and will be one of the largest subway stations in the world after completion. The construction project is part of the ambitious infrastructure development plan designed to expand the current almost 9 km long, single- line metro network in the Algerian capital to a total of 55 km in length and featuring three lines over the next 10 years. The modern metro system will help to reduce the daily traffic jams and increase the mobility of the city´s residents. With a population of more than three million inhabitants, Algiers is also the most important transport hub in Algeria.

Two cross-sections – one formwork carriage Place des Martyrs features two different cross-sections. The imposing arch width of 23 m in the middle section, tapers in the northern and southern directions resulting in 16,5 m widths respectively. PERI engineers developed a formwork carriage construction on the basis of the VARIOKIT engineering construction kit in order to be able to cost-effectively realize both cross-section variants whilst using the same system components and formwork

segments. Furthermore, special attention was paid to the design of the bracing during the planning phase as the concreting cycle length of 5,10 m is relatively short. Based on the VARIOKIT modular construction system, the PERI formwork carriage solution is ideally suited to meet all project requirements: user-friendly as it can be hydraulically operated with a control panel, cost-effective due to the rentable

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Based on the VARIOKIT modular system, the PERI formwork carriage solution is tailored to meet all project requirements and is also hydraulically operated. (Photo: PERI)

The Algerian metro station Place des Martyrs is 144 m long and features record-breaking dimensions with its 23 m width and 14,8 m height. (Photo: PERI)

CONSTRUCTION WORLD MAY 2015