COUNTER MEASURE OF SCOURING AROUND A BRIDGE PIER
Keywords:
scour, countermeasure, Riprap, Tetrahedron frames, submerged vanes, controlling deviceAbstract
It is essential to control the scouring around pier of bridge for safe economical design. It is found that the
performance of any controlling device which is deployed around the bridge piers depends on how the device counters the
process of scouring. By placing different parameters such as riprap around the bridge piers, an array of piles in front of
bridge piers, a delta wing-like fin in front of bridge piers, partial pier group and tetrahedron frames of stones around the
bridge piers, which are reduced the scour depth. Multiple efforts have been made to reduce the scour depth by placing scour
countermeasure devices. It is found that failure mechanism related with both armoring and flow alternating counter measure
is not very different. It is also noticed that even through adequately design against shear failure, a riprap layer is unsafe to
other failure mechanisms which is rendering it ineffective in arresting.
