1. Unit 6/P2 – Subsoil investigations Name ________________
Why
Type of soil
Depth of load bearing soil
What else might be underground
Electrical, water, gas
Previous use of site – contaminated ground
You need to know what type of soil you are building on in order to get the right type of substructure
Use the text book to describe each of the following subsoil investigation techniques (pg 193)
Desk Top Study
Walk over study
Auger Hole
Trial Pit
Window Sampler
Boreholes

2. Unit 6/P2 – Subsoil investigations Name ________________
What might you find in the subsoil
Groundwater
May indicate nitrates
Water table
Pore Water Pressure
Radon Gas
Contaminated ground – previous use?
Soil Profile
Soil Parameters
Load = reaction

3. Unit 6/P2 – Impact on Foundation Design Name ________________
Loading
Water Table
Contamination
Bearing Capacity of the soil
Cost
Principles affecting substructure design
Type of Building
Soil Conditions
Size and shape of site
Type of foundations available