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

Light-weight aggregate prestressed concrete, Light-weight Aggregate Prestre...

Light-weight Aggregate Prestressed Concrete The use of  light-weight aggregate concrete for prestressed concrete construction is well established. The main advantage of  light-

On-line storage vs. off-line storage, On-line storage vs. off-line storage ...

On-line storage vs. off-line storage Design of storage pond is commonly divided into off -line storage and on-line storage. The on-line storage concept includes inclusion of s

State the term - terminology, State the term - Terminology There are ma...

State the term - Terminology There are many technical terms whose understanding provides us with a good insight of  the subject. Some of  these terms are, indeed, general and t

Beneficial points of sliding bearings over roller bearings, What are key be...

What are key beneficial points of sliding bearings over roller bearings ? In roller bearing for a given movement a roller bearing exhibit modify in pressure centre from its un

Pavement drainage, Pavement Drainage: Water enters the pavement layer...

Pavement Drainage: Water enters the pavement layers through cracks, joints and open spaces in the pavement surface. The water reaches the soil sub-grade on which the pavement

ENGlLISH, Ask question #WHAT is presentation skill #

Ask question #WHAT is presentation skill #

Explain about the pre-tensioning systems, Pre-tensioning systems In the...

Pre-tensioning systems In the previous unit we have seen different steps in a pretensioning operation. Tendon wires or strands (formed as a rope type arrangement made of  sever

Conics, what is the eccentricity of ellipse

what is the eccentricity of ellipse

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