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

Influence Line for shear at Support, I have to draw the IL for the shear at...

I have to draw the IL for the shear at a roller support and am not sure how it should look

Rcc and rbc, types mixing,curing,water cement ratio,qualities and workabili...

types mixing,curing,water cement ratio,qualities and workability

Explain the secondary treatment for wastewater, Explain the Secondary treat...

Explain the Secondary treatment for wastewater Secondary Treatment: to remove soluble BOD that escapes the primary treatment and to provide added removal of suspended solids.

State the effect of friction for a straight tendon, State the effect of fri...

State the effect of friction for a straight tendon The length effect represents the effect of friction for a straight tendon due to slight imperfections of the duct. In practic

Passenger conveyors, Passenger Conveyors: Passenger conveyors are used...

Passenger Conveyors: Passenger conveyors are used at locations where a large concentration of passengers has to be moved from one place to another. Escalators are used to conv

Define the thiem equations for confined aquifers, Define the Thiem Equation...

Define the Thiem Equations for Confined Aquifers   Using natural log:  Q = 2ΠKm(h 2 - h 1 )/ln(r 2 /r 1 )      m = aquifer thickness (ft) Using log 10 :   Q = 2Km(h 2 - h

State the design process of prestressed concrete, State the Design process ...

State the Design process of Prestressed Concrete Most of the times, the design process is an interactive and trial procedure in which the cycle of analysis - design - analysis

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