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

Determine the term - degree of prestressing, Determine the term - Degree of...

Determine the term - Degree of Prestressing Degree of Prestressing It is a measure of the magnitude of the prestressing force related to the resultant stress occurring in

Why does the pressure increase under soil, Soil pressure enhances with dept...

Soil pressure enhances with depth due to the overburden or self-weight of the soil and because of loads imposed upon the soil. For example, the pressure variation below the dept

Calculate the change in volume, Calculate the change in volume: If the...

Calculate the change in volume: If the bar is 1 m long with rectangular cross section of 300 mm deep and 400 mm wide, compute the change in volume of the solid because of a lo

Hydraulic design problems, This assignment is a Hydraulic Design assignment...

This assignment is a Hydraulic Design assignment for Civil Engineering Major in USA. Please try if there is someone professional who can do this work because it''s too sensitive. f

Construction of concrete carriageway, Question If construction of conc...

Question If construction of concrete carriageway is carried out in summer, be capable of expansion joints be omitted? Answer If construction of concrete carriageway

Explain the suppressed rectangular weir, Explain the Suppressed Rectangular...

Explain the Suppressed Rectangular Weir If the length of the weir (b) equals the width of the channel, i.e., the flow is not "contracted".

Functions and desirable characteristics of pavements, Functions and Desirab...

Functions and Desirable Characteristics of Pavements Function of Pavement A pavement is that part of a road on which vehicles travel. The pavement has the following f

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