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

Define npdes sampling requirements, Define NPDES Sampling Requirements? ...

Define NPDES Sampling Requirements? The sampling needs under NPDES are given at 40 CFR Part 122, as part of the needs for applying for an NPDES discharge allow. The needs are b

Determine the grade rod reading at station, A section view of a proposed ro...

A section view of a proposed roadway is shown in Figure 1 with an existing grade point elevation of 100-ft. The proposed roadbed finish grade elevation at station 50+00 is 95.00-ft

Environmental engineering, A nearly horizontal, 12 ft wide rectangular chan...

A nearly horizontal, 12 ft wide rectangular channel carries 60 cfs at a depth of 3.0 ft. The width of the channel is smoothly contracted to 6 ft at the downstream section. (a) Dete

Industrial steel floor fire proof, i want to know the construction details ...

i want to know the construction details of industrial steel floor?

Civil and statistics, application of normal distribution in civil engineeri...

application of normal distribution in civil engineering

Estimation of design flood discharge, Q. Estimation of design flood dischar...

Q. Estimation of design flood discharge? These methods are also in vogue for estimating maximum discharge. Discharge estimated using the above three methods may be compared wit

Recognize the losses of prestress, Recognize the losses of prestress Re...

Recognize the losses of prestress Recognising the losses of prestress which take place after the prestressing OF concrete structural elements, it is to be appreciated that pres

Functions of a column in a building, What are the functions of a column in ...

What are the functions of a column in a building? Ans) A column is used to handle the weight of the roof and/or the upper floors. Now days, many columns are used for decorative

Distomat, write the brief description about distomat

write the brief description about distomat

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