Soil exploration and Site Investigation

 These are the important parameters that should be required from soil investigation report. 

• Soil Identification of the site by boring test
• Location of the ground water table
• Allowable bearing Capacity for foundation design
• soil classification for seismic parameter
• Soil properties to be used in the evaluation of soil pressure, soil settlement, and to determine also if the soil is expansive soil or liquifiable.  

There 3 Steps of Soil Exploration

• Boring =drilling a hole in the ground
• sampling =refers to removing of soil from the hole to obtain valuable information and properties of the soil.
• Testing = refers to determining the characteristics and properties of the soil.

Common Types of borings

Auger boring = by using like tool used to bore a hole by hand operation or power operated. This type of boring is difficult to be operated on very soft clay or coarse due to the hole tends to refill when the auger is removed.

Test Pits = excavating the soil that permits a direct visual inspection of the soil along the sides of the pit. test pits are limited to depth of 10ft to 15ft where water table are expected below this depth.

Core Boring = is usually done when drilling through rock formation.