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

Good surface regularity for sub-base in concrete pavement, Q. Good surface ...

Q. Good surface regularity for sub-base in concrete pavement? Surfaces of sub-base material for concrete carriageway must be built in a regular manner due to the following reas

Describe the consolidation settlement, Q. Describe the Consolidation Settle...

Q. Describe the Consolidation Settlement? The resulting settlements which are time-dependent and are termed consolidation settlements. After the consolidation settlements take

Verify the void ratio and water content, Derive the relation among void rat...

Derive the relation among void ratio (e), specific gravity of particles (G) and moisture content at full saturation (w). A certain sample of saturated soil in a container weighs

Base isolation, why base isolation is not good for tall building

why base isolation is not good for tall building

State the term axial prestressingin - Concrete, State the term Axial Prestr...

State the term Axial Prestressingin Concrete If the centroid of cross-sectional areas of tendons is at the location of the centroid of the cross-section of the concrete member,

Diffrence between concrete road and bituminous road, Q. Diffrence between C...

Q. Diffrence between Concrete road and bituminous road? Concrete road belongs to rigid pavement and they don't deflect under traffic loads. Quite the reverse, bituminous pavem

Pycnometer., To determine the specific gravity of fine aggregate (sand) by ...

To determine the specific gravity of fine aggregate (sand) by Pycnometer.

Barometric leveling, what are advantages and disadvantages of barometric le...

what are advantages and disadvantages of barometric levelling

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