BRA Mark AB

Tecomatic has supplied a precast concrete mattress that protects a stormwater channel in an inaccessible noise barrier on Route 40 and prevents erosion.

The client’s challenge

Stormwater drainage in inaccessible noise barrier

When BRA Mark AB carried out an extensive housing project in Wendelstrand, a 35-meter-high noise barrier had to be built to protect against traffic noise from Riksväg 40, one of West Sweden’s busiest roads. About 17 meters up in the embankment, a stormwater pipe that collects water from both the road surface and the surrounding ground. There was no functioning solution to divert this water, which risked delaying the progress of the project. At the same time, the area was technically challenging and difficult to reach with traditional equipment.

Our solution

Tailor-made concrete mattress for stormwater channel

Together with BRA Mark AB, we developed a solution whereby a channel was excavated parallel to Riksväg 40 and then led down the natural shape of the hillside. To protect the channel against erosion, a form-fitted UCS100 concrete mattress was installed: a dense, evenly thick textile that was manufactured after on-site measurement and adapted to the ground’s curves and level differences. The mattress was produced as a finished mold in our factory and could be easily transported to the job site. On site, it was grouted with customized concrete. This method eliminated the need for heavy transport and on-site casting, making the work more efficient and minimizing the climate impact.