Bridges can suffer from scour when flow conditions change, or rivers go into flood. This scour can threaten the structural integrity of bridges if allowed to develop, which can lead to settlements and failure.
Fabric formed concrete mattress offers reliable and long term protection from scour
Concrete Mattress Solution
Fabric formed concrete mattress seals against the piers and abutments preventing flow from eroding material under the mattress. The slab consists of high-quality plain concrete, able to resist flows of over 12m/s with a design life of 50 years or greater.
The slab extends beyond the structure, outside the influence of both local and contraction scour. The edges are usually protected with riprap to prevent underscour occurring or embedded as appropriate.
A top and bottom zip connection produces a ball and socket shear, creating a continuous concrete slab over large areas. A 220mm thick slab is designed for most bridge scour conditions, slabs of 100mm-600mm can be produced where required.
Once installed, the continuous concrete slab can resist high flows with little maintenance, while its low thickness maximises both foundation depth levels and flow area capacity combating flooding.