Bricked Arch in the Furnace Chamber of a Biomass CHP Plant
An arch supports itself — but only once the keystone is in place
Initial situation
A bricked arch in the furnace chamber supports itself, but only if geometry, bearings and sequence are right. Whatever is laid out crooked in the formwork later sits in the brickwork as restraint stress. SBS Refractory Service built a new bricked arch in the furnace chamber of a biomass CHP plant.
Scope of services
- Arch construction
- Arch centring
- Skewbacks
- Brickwork
- Furnace chamber
Project data
The task
Radius and brick division must be fixed before the first brick is laid
The arch pushes sideways — if the bearing yields, even the best brick is of no help
The arch may only be struck once it supports itself
The SBS approach
The arch centring was prefabricated to an exact fit; it defines the radius and brick division.
Skewbacks and furnace shell were designed to take up the lateral thrust of the arch.
Bricking proceeded from both skewbacks towards the centre. The keystone was fitted, not driven in, and the centring was struck only once the arch was self-supporting.
Bricked Arch in the Furnace Chamber of a Biomass CHP Plant in pictures
The arch is closed on the centring
Bricked from both skewbacks towards the centre
Just before the keystone
Measurable results
The key figures of the “Bricked Arch in the Furnace Chamber of a Biomass CHP Plant” project
Similar references
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