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

Guidelines for selection of site, Guidelines for Selection of Site: Th...

Guidelines for Selection of Site: The following are some of the guidelines for selecting the site of a bridge : (a) A site which is on a straight reach of the river is pref

What is the pre-tensioned concrete, What is the Pre-tensioned concrete ...

What is the Pre-tensioned concrete In Pre-tensioned concrete tendons are kept stretched with suitable mechanisms and concrete is cast into the forms through which stretched ten

Structural analysis_cantilever trusses, Obtain the values and direction of ...

Obtain the values and direction of the supporting reactions of the truss given below. Use the method of section to determine the forces in each member.

Define the net positive suction head, Define the Net Positive Suction Head ...

Define the Net Positive Suction Head All values in the equations are in units of feet.  Note: Only use values related to the suction side of the pump.   NPSHR = Net Posi

What is activated sludge process, Q. What is Activated Sludge process? ...

Q. What is Activated Sludge process? The term Activated Sludge is used to indicate the sludge which is obtained by settling sewage in presence of abundant oxygen. The Activated

Define the term - clamp splice, Define the term - Clamp splice In a Cla...

Define the term - Clamp splice In a Clamp splice, bolts and nuts alongwith clamp plates are used. Tendons are held in-between the clamp plates and these clamp plates are tighte

Explain the bolted connections, Explain the Bolted Connections a) Quest...

Explain the Bolted Connections a) Questions generally relate to the size of the bolt needed for a connection or b) Number of bolts for a given loading and specified size

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