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

Show the continuous piezocone penetration test, Q. Show the Continuous Piez...

Q. Show the Continuous Piezocone Penetration Test? Continuous piezocone penetration test essentiallycomprises standard cone penetration test and a measurement of pore water pre

CBR of soil, Why IRC 37-2012 has taken 90th percentile for pavement design ...

Why IRC 37-2012 has taken 90th percentile for pavement design of expressway or NH while they hav taken 80th percentile for state highway design ????????

Define role of diver in underwater inspection of bridge, Define Role of Div...

Define Role of Diver in Underwater Inspection of Bridge? Diver's role is primarily to point out a potential scour problem. The diver can use one of the following equipment to m

#high way engineering about road pavements.., what is the function of longi...

what is the function of longitudinal joints in concrete road pavements?

Manufacturing technique of ferro cement, what are the manufacturing techniq...

what are the manufacturing techniques of ferro cement?

Stone, Explain briefly physical classifications of stone

Explain briefly physical classifications of stone

Explain the critical flow - hydrolic system, Explain the Critical Flow ...

Explain the Critical Flow Critical flow occurs where the flow depth is at the critical depth. One location in an open channel is where the flow is approaching a free outfall.

Steel Design Assignment, I have a steel design assignment for my class that...

I have a steel design assignment for my class that will be given to us on Friday at 6 pm and will be due at 10 pm. I was wondering if you guys would be able to help me with that?.

Cocrete, preparation and uses of concrete

preparation and uses of concrete

Foundation, classification of foundation

classification of 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