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

Plastic, what is plastic?its types and composition and its uses as engineer...

what is plastic?its types and composition and its uses as engineering material

Transportation engineering, distinguidh between alluvial and qasi alluvial ...

distinguidh between alluvial and qasi alluvial stream

Dock wall and dry dock, Dock Wall and Dry Dock: Dock Wall Fig...

Dock Wall and Dry Dock: Dock Wall Figure gives the diagram of a dock wall. Figure: Mass Concrete Dock Wall Dry Dock Figure 9 gives the details

By which materials shank of a spur construct, Q. By which Materials Shank o...

Q. By which Materials Shank of a spur construct? Shank of a spur is constructed of sand core and its exposed faces are protected by stone pitching. The attack at nose is very h

Concrete structure, which section is most effective for a design of beam an...

which section is most effective for a design of beam and why

Thodolite, Ask queexplain about the essential parts of transisit ordinate o...

Ask queexplain about the essential parts of transisit ordinate or vernier theodolitestion #Minimum 100 words accepted#

Deformation equation for settlement, Q. Deformation Equation for settlement...

Q. Deformation Equation for settlement? When a load is applied on an elastic body, it results in strain. The summation of strain over a length is deformation or settlement. In

Non destructive inspection steel/cast iron substructure, Explain the Non De...

Explain the Non Destructive Inspection Steel/Cast Iron Substructures Some of the structural defects in steel structures may not be visible during visual inspection. In that eve

Grillage foundation, what are the advantages of grillage foundation and why...

what are the advantages of grillage foundation and why people prefers that?

Hoyers long line system pre-tensioning, Hoyers long line system pre-tension...

Hoyers long line system pre-tensioning When concrete attains the required strength,  jacks  are released and tendon wires in-between various units are cut.

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