A new central university campus with three faculties is being built in Delémont, Switzerland. 600 students will be stuyding toward their various master degrees. The campus complex is 200 m long and comprises four offset blocks with 4 levels each, plus an underground car park and a 9-storey tower on the south side.
The slabs, 30 cm thick and partly with irregular recesses, include beams in longitudinal direction on every level. They are 40, 70 or 100 cm thick. The requirements for concrete works and formwork engineers were exceptional: slabs and beams to be completed in single pours, on schedule and in budget.
The joint pours of slabs and beams proved the main handicap and K.O. criterion for other approaches. Contractor Parietti et Gindrat SA relied on the slab system MevaDec to handle the complex job dead on time. Here’s how site management mastered the task.
The MevaDec props, beams and panels are set up by only two workers. When reaching the position where a concrete beam is to be poured, MEP shoring towers are moved into place with wooden beams and panels to form the underside of the beams. AluStar or StarTec wall panels are mounted horizontally to form the beam edges while wooden beams close the gap between the slab and concrete beam formwork. Then MevaDec panels are again set up for the slab area until the next beam position is reached. MevaDec’s flexibility which can change its forming direction freely, makes work very fast despite the many concrete beams.
Different slab areas are all formed without time-consuming filler areas by using various panel sizes and combining them in varying directions and in offset position within the primary beams.
Once the slab has reached its minimum setting time, the props’ drop heads are lowered to pull out the MevaDec beams and panels and move them to the next pour. A few props remain for re-shoring. On a total slab area of 16,000 m², the saving on inventory, labour, work flow time and rental costs is immense.
The site works with 2 cycles of 600 m² each, one being set up while the other is being used for a pour. Stripping follows every 3 days (every 7 days on the concrete beams), pours are scheduled every 6 days. Fast work flow, simple site logistics, easy handling and work without crane are what make the MevaDec the site hero, as Tiago Geraldes explains:
“Using the MevaDec for the first time, we’ve become fans. It is so simple and fast to set up, flexible to adapt around the many concrete beams and varying slab layouts. We are saving time, labour, money and crane time. And: we’re on schedule and in budget.“
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