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

Explain forty-five degree spread rule for driven piles, Q. Explain Forty-fi...

Q. Explain Forty-five degree spread rule for driven piles ? For driven piles the length of piles driven into the ground is generally based on dynamic driving formula such as Hi

Road base and base course in flexible carriageway, Road base vs. base cours...

Road base vs. base course in flexible carriageway Roadbase is the most significant structural layer in bituminous pavement. It's designed to take up the function of distributi

True or false, an increase in consumer income will affect the supply of any...

an increase in consumer income will affect the supply of any given product

Transportation, investigation of strength properties of black cotton soil s...

investigation of strength properties of black cotton soil stabilised with fly ash and georeinforcement

What do you mean by synoptic coverage, Q. What do you mean by Synoptic Cove...

Q. What do you mean by Synoptic Coverage? Depending upon the area of interest, areas covering few hundred sq m to thousands of sq km can be suitably collected and studied. Phot

Types of cross-drainge structures, Types of Cross-drainage Structures: ...

Types of Cross-drainage Structures: The following are the types of cross-drainage structures : (a) Culverts, having waterway upto 6 m. (b) Minor Bridges, having waterwa

Strenght of meterials 2, Difference between direct and bending stress diagr...

Difference between direct and bending stress diagrams

Linear algebra concept, Scenario: You are working for a structural engineer...

Scenario: You are working for a structural engineering firm and you have been assigned the task of computing the code checks on a new structural design. Though another commercial p

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