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

Highway engineering., history and development of indian road and planning

history and development of indian road and planning

Good surface regularity for sub-base in concrete pavement, Q. Good surface ...

Q. Good surface regularity for sub-base in concrete pavement? Surfaces of sub-base material for concrete carriageway must be built in a regular manner due to the following reas

Structural analysis and design, Scenario You are working as a structural...

Scenario You are working as a structural technician and have been charged with a range of jobs   involving analysis and design of a number of structural members. Task 1 a)

Formation of frost heave, Q. Formation of frost heave? In the past, it ...

Q. Formation of frost heave? In the past, it was believed that formation of frost heave was related to volumetric expansion of soil water which changed from liquid state to sol

Types of cement, Types of Cement In addition to ordinary Portland ceme...

Types of Cement In addition to ordinary Portland cement there are various varieties of cement. Significant varieties are briefly explained below: (i) White Cement: The ce

Flow, what is maximum flood level

what is maximum flood level

Define fathometer with the odolite - sounding/sensing device, Define Fathom...

Define Fathometer with the odolite - Sounding/Sensing Devices? The horizontal scale problem in use of Fathometer can be solved by using equipment, which combines a Fathometer w

Stabilization of Black Cotton soil, How the stabilization of black cotton ...

How the stabilization of black cotton soil was done in field? what are the methods to do that?

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