The car park at VandCenter Syd is a 2nd generation installation
and it is the first of its kind. With an area of 430 m2, the car
park has been constructed as shown in the figure. The car park has
been laid with paving stones, so the water can penetrate the gravel
filler. Under the surfacing, is an approx. 30 mm levelling course
through which water can be transported without the levelling course
losing its bearing capacity. The water is then transported to an
approx. 450 mm bearing course, which can absorb large amounts of
water, and then sent further down to the subsoil.
Longitudinal profile of the structure of the car park with
dry well, wadi and overflow (on the right). Furthermore, the dry
well is fitted with a level meter placed in the middle of the
wadi.
The dry well has been placed in the middle of the car park and
covered by a wadi, i.e. a stormwater infiltration bed. Surface
run-off-water, which cannot permeate the surfacing due to, for
example, frost or water-saturated soil, is collected in the wadi.
From the wadi, the water runs through a layer of topsoil and
further down to the dry well. When the dry well is full, the water
will be led to the sewer system through the overflow.
Moreover, a membrane has been placed under the bearing course at
the dry well to separate the bearing course from the dry well. The
goal is to create damming, so the water can be led to the wadi from
the surface, and through this to the dry well.