Preloading - control of settlements, Civil Engineering

Assignment Help:

Q. Preloading - Control of settlements?

This method consists of loading the soil strata by a load intensity which will be equal to or higher than the expected load intensity. The soil strata will settle due to preloading. Later, remove the preload and construct the structure. The period of preloading depends on the time rate of settlement. Hence, if the rate of settlement is slow, then, period of preloading will be too long. The compression under preloading will be very rapid in porous soils with low relative density. Rebound after removal of preload is also less in such soil deposits. Addition of water during preloading may be advantageous, since it breaks the weak bonds in strata having silts and loosely packed sands. Organic silts, peats, sanitary fills can be precompressed effectively by preloading. Lowering of ground water table also contributes for preloading.

Reloading in the site is time consuming in soils where consolidation settlement is important unless drainage facility like sand drainslband drains, well points, electro-osmosis methods are used along with preload. Reloading is generally adopted in poor soils with relatively high water contents. With preloading, unless drainag; is rapid, pore pressure build up will take place, reducing the shear strength.


Related Discussions:- Preloading - control of settlements

Poisson distribution function, Poisson distribution function: Let X I ...

Poisson distribution function: Let X I , X 2 , ..., X,& b e n independently and identically distributed random variables each having the same cdf F ( x ). What is the pdf of t

Strength of materials, Didtribution of shear stree over a triangular sectio...

Didtribution of shear stree over a triangular section

Drawbacks of curing by ponding and polythene sheets, Question What are the ...

Question What are the main drawbacks of curing by ponding and polythene sheets ? Answer Purpose of curing is to decrease the speed of heat loss of freshly placed concrete to atm

Online job, I am M tech in civil engg looking for online assignment job.

I am M tech in civil engg looking for online assignment job.

Raft and beam foundation, why is weight of raft not considered in structura...

why is weight of raft not considered in structural design of raft and beam

Stone tiles for construction material, Q. Stone tiles for construction mate...

Q. Stone tiles for construction material? For Public toilet bath rooms kitchen etc. we may be use stones tiles ( marble , kota stone , Polished Kuddapa stone or polished Dhura

Dense bituminous macadam, Dense Bituminous Macadam: A Dense Bituminou...

Dense Bituminous Macadam: A Dense Bituminous Macadam (DBM) is a close-graded premix material having a voids content of 5-10 per cent. Two gradings are normally adopted :

Properties of bricks, Properties of Bricks The required properties of g...

Properties of Bricks The required properties of good bricks are following: A.   Color: Color should be bright and uniform. B.   Shape: Bricks should have plane faces.

Industrial steel floor fire proof, i want to know the construction details ...

i want to know the construction details of industrial steel floor?

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