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

Determine the magnitude of application of the active thrust, A retaining wa...

A retaining wall 9 m high retains cohesion less soil, with an angle of internal friction 33°. The surface is level with the top of the wall. The unit weight of the top 3 m of the f

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

Pre-stressing work, Under which situation shall engineers use jacking in ag...

Under which situation shall engineers use jacking in agreement end only and from both ends in pre-stressing work?

Analysis of the two stage construction, A County is planning to build a new...

A County is planning to build a new roadway connector in the rapidly developing area of the county. The road can be built at a reduced capacity now for $30 million and can be widen

Explain the principle of working of shock transmission unit, Explain the Pr...

Explain the Principle of Working of Shock Transmission Unit? The STU consists of a machined cylinder with a transmission rod that is connected at one end to the structure and a

Block contouring, how to calculate contour surveyed area

how to calculate contour surveyed area

Geological classification of stones, Geological Classification Based on...

Geological Classification Based on their beginning of formation stones are classified into 3 main groups-Igneous, sedimentary and metamorphic rocks. Igneous Rocks: Thes

Determine the head loss due to friction, Determine the Head Loss Due To Fri...

Determine the Head Loss Due To Friction Determine the head loss due to friction using the Darcy-Weisbach equation. The water is pumped at 3.0 gallons per minute, has a temperat

Bearing capacity, which kind of pile can increase the bearing capacity, if ...

which kind of pile can increase the bearing capacity, if the water level high in sang soil surface?

Show the differences between GGBS and PFA, Q. Show the Differences Between ...

Q. Show the Differences Between GGBS and PFA? The use of GGBS as substitute of cement improves smaller reliance on PFA. Particularly GGBS is supposed to be more compatible with

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