COMPATION OF SOIL

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SOIL COMPACTION In Civil
engineering practice, the soils at a given site are often less than desirable for the intended purpose. They may be: Weak (strength)Highly
compressible Have a high permeability Solution Relocate the project Articulate design for structure members Stabilize or improve the properties of the soil The third alternative may be in
most cases the most economical alternative. There are different techniques for
improvement of soils (This subject is covered in details in CE 486 “Improvement
of Geotechnical Materials”).
We will consider in this course only compaction.
SOIL COMPACTION
is also very important when soil is used as an engineering material  that is the structure itself is made of soil.
Example There are Earth dams Highways Airfields etc.
Compaction is the densification of soils by removal of air through
the application of mechanical energy. & by Definition The degree of compaction is measured in
terms of its dry unit weight.
SOIL COMPACTION
1 increases unit weight
2 increases shear strength
3 Increases bearing capacity
4 Increases stability of slopes of embankments
But Decreases settlement of structures