AN ICE funded flood defence system passed the latest stage of tests last month when engineers demonstrated that the permanent demountable structure was watertight even when subjected to impact loads.
Tilt-Dam is the brainchild of civil engineer John Forrest who developed his design with a grant from the ICE's research and development enabling fund in July 2004. He formally launched the device at the ICE's headquarters in March this year (ICE News 14 April).
The 2.7m long 2m high steel and concrete vertical barrier is hinged at its base. In the upright position, the structure holds back water at time of high flood risk. It can be lowered when water levels have fallen.
Steelwork was manufactured by Wessex Fabrications and the concrete slabs and counterweights by SU-FIX.
The latest tests were funded by Forrest who is in talks with a major contractor to take TiltDam into production.
Watertightness and dynamic impact tests were carried out on the structure at a disused spillway at the Environment Agency's purifi ation lakes at Lea Marston, Birmingham last month.
Two units were placed at the bottom of the derelict slipway leading down to the lake to form a wall 5.4m long.
A 1.75m head of water was imposed on the wall when the spillway was fi led with water and a railway sleeper was pounded into the structure to test it for impact.
'In biting cold weather, our self-designed water test passed with fl ng colours, ' Forrest told NCE.