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

Bricks properties, what is the application of silica,aluminaand magnesium i...

what is the application of silica,aluminaand magnesium in bricks?

Zero energy building , this is our final year project .please help me to gu...

this is our final year project .please help me to guide about it

Define lead lag relationships - construction management, Define Lead Lag Re...

Define Lead Lag Relationships 1. A lead is when the successor task begins before the predecessor task is complete 2. A lag is when a successor task does not

Influence Line for shear at Support, I have to draw the IL for the shear at...

I have to draw the IL for the shear at a roller support and am not sure how it should look

Define radiography - underwater inspection of bridge, Define Radiography - ...

Define Radiography - Underwater Inspection of Bridge? Radiographic non-destructive examination of components is based on the phenomenon that materials absorb radiation energy a

Calcculate the material costs, A capital improvement project requires the i...

A capital improvement project requires the installation of a property line fence along the 250-ft Northern boundary line.The decorative aluminum fence is constructed of posts space

Bending stress distribution diagram, i want to know how bending stress dist...

i want to know how bending stress distribution in c section

Define in brief about the term - concrete, Define in brief about the term -...

Define in brief about the term - Concrete Concrete is reinforced with steel bars in structural components so that the tensile stresses are taken up by the reinforcement. These

Support, In a RC Frame what will be the support condition for a cantilever ...

In a RC Frame what will be the support condition for a cantilever edge beam i.e. fixed, pinned, encastre or knife?

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