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

What is material at site return, Q. What is Material at site Return? Th...

Q. What is Material at site Return? The authority is executive charge of a work should be responsible for holding in safe custody for controlling the consumption and to the ext

Water piped scheme, how to use mood diagram to get f and other Re

how to use mood diagram to get f and other Re

Engineering survey, With respect to implementation of Civil Engineering pro...

With respect to implementation of Civil Engineering projects explain the relevance of application of the principle of ''Working from Whole to Part''

Define pneumatic tools for underwater inspection of bridge, Define Pneumati...

Define Pneumatic Tools for Underwater Inspection of Bridge? These are more efficient than hand tools and cause less diver fatigue. The disadvantages are that below about 20 m,

Tremie pipes are normally used with aid of hoppers, Question For underw...

Question For underwater concreting, tremie pipes are normally used with aid of hoppers. From time to time tubes are put in inside the hoppers and with reasons? Answer

Concrete, What is Under vibration of fresh concrete?

What is Under vibration of fresh concrete?

Mohrs circle, The state of stress at a point is given through the stress co...

The state of stress at a point is given through the stress components sx = 70 MPa, sy = 10 MPa, and txy = - 40 MPa. Using Mohr''s circle find (i) Principal stresses, and (ii) Princ

Turbines, How do we get electricity even when the gates of a dam were close...

How do we get electricity even when the gates of a dam were closed?

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