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

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

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