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

Major functions of features observed in a typical manhole, Question Wha...

Question What are the major functions of following features observed in a typical manhole ? Answer (i) Groove near benching, (ii) R.S.J. (iii) double seal manhole cove

Soil structure, what is soil structure and types of soil structure?

what is soil structure and types of soil structure?

Reverse and direct circulation drill drilling in piling, Q. Reverse and dir...

Q. Reverse and direct circulation drill drilling in piling? For reverse circulation drilling and direct circulation drilling, major difference in drilling method is connected t

Determine the latitude and departure - transportation, Determine the latitu...

Determine the latitude and departure of each side of the closed traverse ABCDA.  Total the latitudes and departures. TIP: For Closed Traverse, Sum of Latitudes is Z

Pumps, largest centrifugal pumps

largest centrifugal pumps

What is main purpose of swabbing, Question After construction of waterm...

Question After construction of watermain, earlier to hydrostatic pressure test , swabbing is approved out. What is main purpose of swabbing ? Answer Pipelines ha

Foundation, Explain briefly shallow foundation?

Explain briefly shallow foundation?

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