VERTICAL MOVING BRIDGE BY WATER AND COUNTERWEIGHT MECHANISM

Civil engineering

The history of lifting heavy objects vertically goes back to the five thousand years ago, at the time of great pyramid of chops at Giza. This research is based on Kattwyk Bridge, and it has been attempted to show that movable bridges can work with water and counterweights and their energy consumption can be reduced because of water pump usage instead of powerful gear mechanism. Water, a tank, counterweights and water pump operates this bridge prototype In this type, an interior span of bridge that remains horizontal s it is raised up and down like an elevator, allowing river traffic to pass beneath the bridge structure. The Bridge mechanism has been divided in three sections. The central section lifts above, while the two side parts remain intact with the bridge supporting frame. The lift mechanism used for the bridge is based on the balance beam with pulley system involving four pulleys and counter weight arrangements. Movable part of bridge section is connected to counter weight on each side using a wire rope string passing over pulley mounted above fixed structure. Track guides wheels mounted on movable section of bridge restrict the motion of central section allowing only the motion only in vertical direction to occur and provide the stability to the bridge structure. The mechanism used to lift the central section by difference of weight is due to the constraint of not using any electric motor or gears but using water for lifting the bridge. In real case situation, the power can be given by electric motors and cables can be used.

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