Local scour at obstructions in rivers, Civil Engineering

Q. Local Scour at obstructions in rivers?

When the water flow in river is deflected by obstructions such as bridge piers, scouring would occur arising from formation of vortexes. The mechanism of formation of vortices is as below: the flow hits the bridge piers and tends to move downwards. When flow reaches the seabed, it will move in a direction opposite to its original flow direction before hitting bridge piers. Therefore this movement of flow before bridge piers results in the formation of a vortex. Owing to formation of this vertical vortex, seabed material is continually removed so that holes are formed at the seabed and this result in local scour at bridge piers. As the shape of vortices looks such as horseshoes, it's sometimes known as 'horseshoe vortex'.

Posted Date: 8/5/2013 5:19:26 AM | Location : United States

Related Discussions:- Local scour at obstructions in rivers, Assignment Help, Ask Question on Local scour at obstructions in rivers, Get Answer, Expert's Help, Local scour at obstructions in rivers Discussions

Write discussion on Local scour at obstructions in rivers
Your posts are moderated
Related Questions
Determine the thickness of flexible pavement layer 2 given the following:  FACTS: Total Structural Number required = 7.0 Total number of layers = 2 Layer 1 consists of

Q. Acetylene gas cylinder for gas welding to be erected in upright position Acetylene gas is normally used for gas welding due to its simplicity in production and transportati

the elevations of grid points for an area as follows: 1 2 3 4 5 6 7 8 F 690 709 726 732 735 740 743 747 E 696 715 729 736 740 737 739 740 D 702 723 733 742 737 737 745 747 C 707 72

how to draw shear moment diagram for cantileaver beam

Design a sewer network

Explain Beam-Columns 1. A specific case of a beam subjected to:  Axial loading Strong axis flexural stress   2. The section is also pinned at both ends pe


Snow weight In spatial trusses, Snow load is much more important than building. As in buildings snow load is only a small proportion of the overall weight of the building, it w

Determine the support reactions for the truss shown below