Reducing Local Scouring at Bridge Piles Using Collars and Geobags

Table 1

Summary of experiments.

Run number	Type of countermeasure	Flow depth, (cm)	Flow velocity, (m/s)	Test time, (hr)
1	None	35	0.345	24
2	Perspex collar	35	0.345	24
3	Aluminum collar	35	0.345	24
4	Steel collar	35	0.345	24
5	Geobag	35	0.345	24
6	Perspex collar and geobag under the initial bed level	35	0.345	24
7	Aluminum collar and geobag under the initial bed level	35	0.345	24
8	Steel collar and geobag under the initial bed level	35	0.345	24