What do you know about shallow piers, Civil Engineering

Assignment Help:

Q. What do you know about Shallow Piers?

In case of some of the existing bridges, piers may be shallow and grip may be found to be inadequate. Protection round piers is then required to be given for their safety. Minimum grip essential for safety is worked out as 1/4 the total height of existing pier from bottom to design H.F.L. At this level bed scour is required to be arrested by providing stone apron with adequate quantity to fully cover scoured face. Launching slope in sandy bedded rivers is assumed as 2 horizontal to 1 vertical. Size and thickness are assumed same as in case of apron of the guide bunds. If one man stone is found to be of insufficient weight to be stable, concrete blocks or stone crates are required to be used. Placing stone round piers at unnecessary higher level is inadvisable as it is liable to be displaced and washed down more easily. At the same time it is not a safe and feasible proposition to wait till river bed scours to just the safe level of 1/ 4 height to ensure minimum grip length. Dumping of stone has, therefore, to be resorted to a little earlier before the lowest safe level is reached.


Related Discussions:- What do you know about shallow piers

Insurance required to be incorporated in deal, Question Is procurement ...

Question Is procurement of third party insurance required to be incorporated in deal for construction works? Answer Purpose of third party insurance is to guard contra

Compare brick masonry versus stone masonry, Compare brick masonry versus st...

Compare brick masonry versus stone masonry advantage and disadvantage? Ans.- Comparison between Stone masonry and Brick masonry- Stone masonry Bri

Determine the basic concepts of prestressing, Determine the Basic Concepts...

Determine the Basic Concepts  of Prestressing In the year 1904, Freyssinet tried to introduce prestresses in concrete to resist stresses developed due to external loads. Later,

What will be the increase in horizontal thrust, A 9 metre high retaining wa...

A 9 metre high retaining wall retains a soil with the following properties: φ = 36°; γ = 18 kN/m 3 . What will be the enhance in horizontal thrust if the soil slopes up from the

Retaining walls, Retaining Walls: Needed to retain the fill portion, a...

Retaining Walls: Needed to retain the fill portion, and generally constructed in dry stone masonry with pucca bunds (Figure). Figure: Typical Design for a Retaining

Graduate, fabrication methods of ironmongery

fabrication methods of ironmongery

Soil testing, what is black cotton soil in dry condition

what is black cotton soil in dry condition

WMM, GRADATION OF WMM

GRADATION OF WMM

Determine the late start time for activity, For the project network shown, ...

For the project network shown, the late start time (day) for activity "Q" is most nearly: Solution:  List the paths leading to "Q" and calculate the duration for each.

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