The retained wall in continuation of abutments both upstream and downstream is called as-
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A.
Border wall
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B.
Flank wall
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C.
Base wall
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D.
Parapet wall
Correct Answer:
B. Flank wall
Explanation:
The wing wall, or flank wall, is the retaining structure built at the ends of an abutment to support the earthen embankment of a bridge or dam. These walls are constructed as extensions of the abutments on both the upstream and downstream sides to protect the banks from erosion and guide the flow of water into the waterway opening. Unlike parapet walls, which serve as safety barriers on top of the bridge, flank walls are primarily designed to stabilize the soil and prevent it from sliding into the water.
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