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TB Heubach Bridge demolition

TB Heubach Bridge demolition

Implenia, a leading construction services company, decided to use an Strukturas Movable Scaffolding System (MSS) Underslung for the demolition of existing concrete decks on the TB Heubach Bridge in Germany.
Moreover this same MSS is also used for the construction of the bridge’s new TT section decks. 
The Heubach valley bridge consists of two parallel structures, which will be demolished and rebuilt in two construction phases.
Bridge info:
Year of construction of existing building: 1968
Length: 184 meters
Width: 16.5+16.5 meters
Bridge spans: 30,6 + 37,5 + 45 + 37,5 + 30,6 meters
Max. height above ground: 18 meters
Demolition of the old bridge and the construction of the new Heubach bridge was awarded by Die Autobahn GmbH des Bundes.

Bridge demolition

MSS at assembling final stage

Deck demolition

The Strukturas MSS solution is particularly innovative because it allows the conversion of the MSS formwork from a box section, which is used during the demolition phase, to a TT section, which is used during the construction of the new bridge decks. This approach saves time and resources, making the construction process more efficient.
The challenging conditions on the job site made the assembly of the MSS particularly demanding, and the Strukturas MSS assembly team had to plan and execute the operation to the best of their ability.
Movable Scaffolding System ensures the minimal intervention to existing infrastructure.
Using MSS for demolition allows the existing highway and the road bellow to remain open throughout most of the demolishing period.
The engineering challenge – to avoid an overload of the superstructure during the demolition and to ensure a safe load transfer within the load capacity of the MSS.

MSS general cross section view when used to demolish the existing concrete decks.

Highlights & Facts:
Max Span: 45,0m
Max MSS Span: 45,0m
Weight of the concrete bridge: Approx 250 KN/m
Width Of Bridge Slab: 16.5m
Min. Hor. Radius: R= 2500m
Max Crossfall: 2.1%
Max Long Slope: 0,63%
Deflection of MSS: MAX L/400

The demolition of old bridge structures with MSS is an effective and safe solution for many bridges.

See the video below and do not hesitate if you wish to consult about your bridge!