Local scour at obstructions in rivers, Civil Engineering

Assignment Help:

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'.


Related Discussions:- Local scour at obstructions in rivers

Explain use of scour valve, Q. Explain Use of Scour Valve? Scour Valve ...

Q. Explain Use of Scour Valve? Scour Valve - Scour Valve at depressions on the main for clearing and emptying the pipes. It is also called blow off valve or Drain valve. This t

BRIDGES, WHAT ARE THE DIFFERENT TYPES OF BRIDGES

WHAT ARE THE DIFFERENT TYPES OF BRIDGES

Bituminous macadam, What is the working capacity of a road paver per hour f...

What is the working capacity of a road paver per hour for bituminous macadam

Reasons of ground heaving during pipe-jacking, Reasons of ground heaving du...

Reasons of ground heaving during pipe-jacking It is commonly recognized that ground settlement is one of the significant concern in pipe jacking operation. Though engineer mus

Vectors, applications of vectors

applications of vectors

Explain about viscous flow loss, Q. Explain about Viscous flow loss? Ab...

Q. Explain about Viscous flow loss? Absorptive material comprises interconnected voids and pores into which sound energy will propagate. When sound waves pass throughthe materi

Hydaurlics : pelton and francis turbine, what are the factors which influen...

what are the factors which influence the efficiency of the turbine?

Purpose of setting minimum amount of longitudinal steel area, Q. Purpose o...

Q. Purpose of setting minimum amount of longitudinal steel areas for columns? In some design codes it specifies that area of longitudinal steel reinforcement must be not less

What is the meaning of compressive stresses, What is the meaning of compres...

What is the meaning of compressive stresses These intentionally induced stresses are compressive in nature and these compressive stresses reduce or completely remove the undesi

Define ways of providing the anti slip device - by embedment, Define Ways o...

Define Ways of providing the anti slip device - By Embedment? A recess can be created in the bed block in which the elastomeric pad will be placed. The functioning of the reces

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd