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SUB SOIL INVESTIGATION
The Purposes of Building Foundations
The foundation is the lowest part of a building. It transmits the load of the structure to the soil below. The main purposes of a foundation are:
To distribute the load from the building over a large area
To load the substratum evenly so as to prevent unequal settlement
To take the structure sufficiently deep into the ground to prevent overturning
Before a foundation is decided, it is necessary to determine the characteristics of the soil at the site of construction. This is done by conducting soil investigations.
The normal methods of soil investigations are:
Inspection
Test pits
Probing
Boring
The different methods of boring are:
Auger Boring
Wash Boring
Percussion Boring
Core Drilling
Field and Laboratory Testing