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

Determine the flow velocity, Determine the flow velocity in 2,000 ft of 8 i...

Determine the flow velocity in 2,000 ft of 8 inch diameter piping flowing full. The energy lost in piping is 54 ft. Use nominal pipe diameter and C = 140.     Solution: Use v =

Introduction to transportation engineering, Introduction to Transportation ...

Introduction to Transportation Engineering: Transportation is the movement of goods and people from one place to another. Transportation Engineering is that branch of engineer

Concrete cracking, Attached information shows construction details of a wat...

Attached information shows construction details of a water tank. The slab was poured in one pour and the walls (incl. Baffles) were poured in two even sections. Forms were stripped

Fundamental purpose of surveying, give a brief definition of surveying and ...

give a brief definition of surveying and describe its fundamental purposes

Shear lag in typical box-girder bridge, Shear lag in typical box-girder bri...

Shear lag in typical box-girder bridge For multiple-cell box girders, there are normally two arrangements. First one is that independent cells are connected by their top flang

Lime, LIME It is significant binding material utilized in building con...

LIME It is significant binding material utilized in building construction. Lime has been utilized as the material of construction from ancient time. While it is mixed with san

What is the safe bearing capacity of a rectangular footing, What is the saf...

What is the safe bearing capacity of a rectangular footing, 1 m × 2 m, placed at a depth of 2 m in an saturated clay having unit weight of 20 kN/m 3 and unconfined compression str

Bituminous Macadam, What is the difference between Dense bituminous Macadam...

What is the difference between Dense bituminous Macadam and bituminous macadam

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