Construction of Bridges


Trisha Mehta asks,

How are bridges constructed in deep seas?

The foundation of a bridge is built separately and made strong. It is then lowered into the sea along with a cage that is kept around it to clear the water. Subsequently, the other parts of the bridge are constructed in layers and placed on top of each other, depending on the design. This is continued till the pillars come above the surface. After this, the top part of the bridge is completed.