Explain foundation design discharge for a bridge, Civil Engineering

Assignment Help:

Q. Explain Foundation design discharge for a bridge?

To provide for an adequate margin of safety against any abnormal flood exceeding the design discharge (Q), the foundations, protection works and training works shall be designed for a higher flood discharge. This discharge shall be computed by increasing the design discharge (Q) estimated for waterway shall be based on (a) actual hydro-meteorological observations of the same or similar catchments (b) the computed flood with probable recurrence intervals of 50 years. The recurrence interval can be modified at the discretion of Chief Bridge Engineer based on the importance of the line.

i)

Catchment upto 500 sq.km.

30%

ii)

Catchment more than 500 sq. km. and upto 5000 sq. km.

30% to 20% (decreasing with increase in area)

iii)

Catchment more than 5000 sq.km. and upto 25,000 sq.km.

20% to 10% (decreasing with increase in area)

iv)

Catchment more than 25,000 sq.km.

Less than 10%(at the discretion of the Chief Bridge Engineer).


Related Discussions:- Explain foundation design discharge for a bridge

Explain about the hydrogen embrittlement, Explain about the Hydrogen Embrit...

Explain about the Hydrogen Embrittlement As a result of the action of acids on high-tensile steels, liberation of hydrogen takes place. It penetrates into the steel surface an

Determine the specific gravity of solids, The Atterberg limits of a clay so...

The Atterberg limits of a clay soil are: Liquid limit = 63%, Plastic limit = 40%, and shrinkage limit = 27%. If a sample of this soil has a volume of 10 cm 3 at the liquid limit a

Pumping for concreting works, Question What are the key problems if use pu...

Question What are the key problems if use pumping for concreting works ? Answer In pumping operation , force exerted by pumps have to overcome friction involving concrete an

Calculate the total passive earth resistance on the wall, A  retaining wall...

A  retaining wall, 4.5 m high, retains a soil with  c = 2 N/cm 2 ,  φ = 30° and g = 20 kN/m 3 , with horizontal surface level with the top of the wall. The backfill carries a surch

Boundaries of rational method in calculating runoff, Question What are main...

Question What are main boundaries of Rational Method in calculating runoff? Answer Calculation of runoff is compound matter that depends on a lot of factors similar to ground

Explain the steady and uniform flow, Explain the Steady and Uniform Flow ...

Explain the Steady and Uniform Flow Steady flow: Flow quantity does not change over time. Uniform flow: The slopes of the energy grade line S = dE/dL, the hydraulic grade li

Cement, Why we mixm pozzolona in cement

Why we mixm pozzolona in cement

Environmental Question, An activated sludge tank treats 1 MGD from the pri...

An activated sludge tank treats 1 MGD from the primary clarify and has an X of 2200 ppm SS. The water euent is 0.9 MGD. 1.0 MGD of the sludge is recycled back into the tank and has

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