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

M.o.c, lime saturation factor meaning with simple english

lime saturation factor meaning with simple english

Pumps, largest centrifugal pumps

largest centrifugal pumps

Breakwaters - harbour layout, Breakwaters: A breakwater is an artific...

Breakwaters: A breakwater is an artificial structure constructed in the sea to protect ships from the effect of waves and storms. Three types of breakwaters are common :

Find the settlement at the centre and at edge of the footing, A load of 300...

A load of 3000 kN is being taken by a square column footing. Side of the column is 3 m, footing rests on a silty soil with a Poisson's ratio = 0.3. Modulus of elasticity of the soi

Determine the density index of the sand sample, An undisturbed sample of sa...

An undisturbed sample of sand has a dry weight of 18.9 N and a volume of 1143 cm 3 . The solids have a specific gravity of 2.72. Laboratory tests indicate void ratios of 0.40 and 0

#title., what is the cause of scale and sludge formation and its diadvantag...

what is the cause of scale and sludge formation and its diadvantages

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