Classification of Wing Walls
Wing walls can be classified according to their position in plan with respect to banks and abutments. The classification is as follows:
1.Straight Wing walls: They are used for small bridges, on drains with low banks and for railway bridges in cities (weep holes are provided).
2. Splayed Wing walls: These are used for bridges across rivers. They provide smooth entry and exit to the water. The splay is usually 45°. Their top width is 0.5 m, face batter 1 in 12 and back batter 1 in 6, weep holes are provided.
3. Return Wing walls: They are used where banks are high and hard or firm. Their top width is 1.5 m and face is vertical and back battered 1 in 4. Scour can be a problem for wing walls and abutments both, as the water in the stream erodes the supporting soil.
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Famous quotes containing the words wing and/or walls:
“No Raven’s wing can stretch the flight so far
As the torn bandrols of Napoleon’s war.
Choose then your climate, fix your best abode,
He’ll make you deserts and he’ll bring you blood.
How could you fear a dearth? have not mankind,
Tho slain by millions, millions left behind?
Has not conscription still the power to weild
Her annual faulchion o’er the human field?
A faithful harvester!”
—Joel Barlow (1754–1812)
“Joshua fit de battle ob Jerico, Jerico, Jerico,
Joshua fit de battle ob Jerico,
An’ de walls come tumblin’ down.”
—Unknown. Joshua Fit De Battle of Jericho (l. 1–3)