Service pit

It is recommended for each SCFB unit to use a service pit to control the water inlet and drain. There are two types of pits, a standard pit and one with a pump. Which one is needed depends on the situation where the SCFB will be installed. When the surface of the area water is normally lower than the bottom of the SCFB a standard pit is sufficient to drain the SCFB system. A service pit with a pump is also required when the barrier needs to be opened just after the flood is over and the surface of the area water is not yet drained to its normal level. When the surface water is normally not lower than the bottom of the SCFB basin a service pit with a pump is always required. The service pit also acts as a silt trap to the inlet as an added safeguard against silt. If there is a watercourse or other means of draining the basin a service pit is not necessarily required.

 




Floodwater activation level

With a flood the floodwater in the service pit will also rises through a pipe connection with the river or a storm sever. The service pit has a check valve that prevents that the SCFB will be filled to early. When the floodwater reaches the activation level, the water flows in the overflow pipe and fill the SCFB basin. The barrier wall will rise now instantly to its top position.

SCFB without pit

Low water

All operational parts of the barrier are invisibly concealed in the ground.

Rising water

The floodwater almost rises to the inlet of the barrier. The check valve in the exhaust pipe prevents the barrier from coming up to early.

Rising water

The floodwater rises to the overflow of the the basin has been reached. The basin will now been filled up with water and the wall rises. The support block pushes the wall against the site of the basin and makes a watertight connection.



High water

The support block pushes the wall against the dry site of the SCFB basin and makes with the water pressure of flood water a watertight connection. 

Slinking water

The Barrier is sinking back into the Basin. With the same speed as the water will subsides.

Low water

The barrier is back in the ground ready for the next flood.

Standard service pit

Low water

All operational parts of the barrier are invisibly concealed in the ground

Rising water

The floodwater almost rises to the overflow of the barrier. The flood water fills the pit. The check valve in the exhaust pipe from the basin prevents the barrier from coming up to early.

Rising water

The floodwater rises to the overflow pipe in the pit.The SCFB basin is now filled up with water and the wall rises. 



High water

The support block pushes the wall against the dry side of the SCFB basin and makes with the pressure of the flood water a watertight connection. 

Slinking water

The barrier is sinking back into the basin. With the same speed as the water will subsides.

Low water

The barrier is back in the ground ready for the next flood

Service pit with pump

Low water

All operational parts of the barrier are invisibly concealed in the ground

Rising water

The floodwater almost rises to the overflow pipe of the barrier. The flood water fills the pit. The check valve in the exhaust pipe of the basin prevents the barrier from coming up to early.

Rising water

The floodwater rises to the overflow pipe of the barrier. The SCFB basin is filled up with water and the wall rises. 



High water

The support block pushes the wall  against the dry site of the SCFB basin  and makes with the pressure of the flood water a watertight connection. 

Slinking water

When the flood subsides the waterlevel in the pit sinks back and activated the pump in the pit.The wall will now empty the complete system immediately.

Low water

The barrier is back in the ground ready for the next flood


Filling the SCFB in different situation.

To determine the number and type of pits and or filling pipes depends on the length, height, the location and how fast the floodwater is expected to rise. Our engineers can advice you in all the situations. 





Options

There is an option to add a flashing light on the end of each unit that will activate when the water flows in the inspection pit, just prior to the barrier rising.