How it works
The drainage pipes that run along the ground, so-called vacuums, are installed with a slight slope. They transport the rain water to the collectors running alongside the ground. The collectors transport the water to a sewer, drainage or central infiltration ditch.
The drainage trenches are cut into the ground with a slight slope by means of a laser-controlled trencher. Then the drainage pipe is put into the trench. Afterwards the trench is filled up with filter stable gravel up to the lower edge of the drainage layer.
We use a special-purpose machine built by ourselves for filling up the drainage trenches which ensures that the drainage pipe is located in the middle of the trench, therefore entirely surrounded by filter stable material.
In the last step, the trench is compacted to avoid settlement later on. In order to avoid silting, we only use gravel that was tested for filter stability.