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

Airport., draw a typical layout of airport ?

draw a typical layout of airport ?

Calculate dead, A building cross section is shown below. The building consi...

A building cross section is shown below. The building consists of eight (8) of the shown frames placed at distance of 20 feet oc for a total length of 140 feet. The glulam beams ar

Determine the term - final tension, Determine the term - Final Tension ...

Determine the term - Final Tension The tension in tendons after losses of prestress have taken place is called as final tension. Final tension is taken to be corresponding  to

Material engineering assignment, select three materials metal and non meala...

select three materials metal and non mealat at least one of the selected materials shold change its property

Joints in box culverts and channels, Joints in box culverts and channels - ...

Joints in box culverts and channels - necessity of water tightness The joints for box culverts and channels must be capable of accommodating movements arising from moisture an

Concrete technology, why strength of transition zone is less than bulk past...

why strength of transition zone is less than bulk paste

Design volume of the aeration basin - sewer construction, Design volume of ...

Design volume of the aeration basin - sewer construction: Problem: What is the design volume of the aeration basin? Solution Assuming that 30% of the plant influe

Belt conveyors, Belt Conveyors: Belt conveyors are used for conveying ...

Belt Conveyors: Belt conveyors are used for conveying materials on a continuous basis. The materials usually handled are coal, mineral ores and stone. They are commonly instal

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