Comparative Study of Scouring Around Bridge Piers
267
0
2
4
6
8
10
12
1 2 3 4 5 6 7 8 9 10 11 12
Scour Depth (m)
Pier Number
(a)
Square
Round
Circular
Group of cylinders
Sharp Nose
0
5
10
15
20
25
1 2 3 4 5 6 7 8 9 10 11 12
Scour Depth (m)
Pier Number
(b)
Square
Round
Circular
Group of cylinders
Sharp Nose
Fig. 4 Total scour depth around existing bridge using the 50 years return period flow with a CSU
equation and b Froehlich equation
0
10
20
30
40
50
60
0
5
1 0
1 5
Scour Depth (m)
Pier Number
(a)
Jain Eq
Laursen and Toch
Lacey Eq
0
10
20
30
40
50
60
70
0
5
10
15
Scour Depth (m)
Pier Number
(b)
Jain Eq
Laursen and Toch
Lacey Eq
Fig. 5 Total scour depth around the existing bridge using the a observed flow b 50 years return
period flow
0
2
4
6
8
10
12
1 2 3 4 5 6 7 8 9 10 11 12
Scour Depth (m)
Pier Number
Square
Round
Circular
Group of cylinders
Sharp Nose
0
5
10
15
20
25
1 2 3 4 5 6 7 8 9 10 11 12
Scour Depth (m)
Pier Number
Square
Round
Circular
Group of cylinders
Sharp Nose
(a)
(b)
Fig. 6 Total scour depth around parallel bridge using the observed flow data with a CSU equation
and b Froehlich equation