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

Water retaining structure, Question Why do BS8007 specify permissible c...

Question Why do BS8007 specify permissible crack width of water retaining structure as 0.2mm for severe, extremely severe exposure? Answer For break width less than

Total station, describe in detail the various parts of a total station

describe in detail the various parts of a total station

Write short notes on numerical rating of bridges, Q. Write short notes on N...

Q. Write short notes on Numerical rating of Bridges? In the numerical rating system, the condition of a bridge is represented by a number consisting eight digits. This eight di

Relief features, characteristics of ridge characteristics of escarpment cha...

characteristics of ridge characteristics of escarpment characteristics of plateau characteristics of knoll characteristics of conical hill

Verify the optimum value of the spacing of the piles, A 16-pile group has t...

A 16-pile group has to be arranged in the form of a square in soft clay with uniform spacing. Neglecting end-bearing, verify the optimum value of the spacing of the piles in terms

Inspection of girder bridge, Q. As an AEN in charge, what inspection will...

Q. As an AEN in charge, what inspection will you under taken at the time of inspection of Girder Bridge 3 x 60 feet. Please explain the important items to be o

Components of a typical expansion joint, Question Explain components of a t...

Question Explain components of a typical expansion joint? Answer Dowel bar-This is major component of joint. It serves to guide direction of movement of concrete growth. Therefo

State the loss of prestress, State the Loss of prestress Loss of prestr...

State the Loss of prestress Loss of prestress due to elastic shortening definitely occurs in pre-tensioned concrete members. But in post-tensioned members it does not occur if

Major considerations in selecting marine plants, Question What are majo...

Question What are major considerations in selecting marine plants and land plants for fitting of band drains? Answer For fitting of band drains by marine plants,

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