Depth of Soil Investigation ~ before determining the actual method
of obtaining the required subsoil samples the depth to which the
soil investigation should be carried out must be established. This is
usually based on the following factors †
Proposed foundation type.
Pressure bulb of proposed foundation.
Relationship of proposed foundation to other foundations.
Pressure bulbs of less than 20% of original loading at foundation
level can be ignored † this applies to all foundation types.
For further examples see next page.
Soil Investigation