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

Concrete, What is compacting factor

What is compacting factor

Of obstacles to both chaining and ranging.., #questof obstacles to both cha...

#questof obstacles to both chaining and ranging. ion..

Highway transportation, HIGHWAY TRANSPORTATION: Broadly, there are two...

HIGHWAY TRANSPORTATION: Broadly, there are two classes of roads: (a)        Urban, and (b)       Rural (Non-urban). Urban roads are those which are located within tow

Structures, Derivation of Moment-Area Method

Derivation of Moment-Area Method

Computation of settlement, Q. Computation of Settlement? The settlement...

Q. Computation of Settlement? The settlement  in any soil mass under an applied stress is given by s = s i + s c + s s where, S  =  total settlement, S i =  imm

Incremental launching mode of bridge construction, In i ncremental launchin...

In i ncremental launching mode of bridge construction, what are ways adopted to increase sufficient resistance of superstructure during launching practice?

Calculate the elastic stretch of the steel wire rope, A 70-ft long, ¾" diam...

A 70-ft long, ¾" diameter, 6 x 7 FC wire rope is resisting a tension force of 12-kips.  The elastic stretch of the steel wire rope given the following properties is most nearly: E

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