Unit Overview
P1
P2
P3
P4
P5
P6
P7
P8
M1
M2
M3
D1
D2
Traditional Cavity Wall and Strip Foundation
Raft Foundations and Timber Frame Construction

P2 - Subsoil Investigation

auger

Before any building work can take place an investigation into the quality of the existing soil will need to take place. The size and type of foundations used will depend on the quality of the soil and size of the building.

 

It is also important to establish who might of used the land before you in case of things such as chemical contamination from previous industrial units.

 

Samples can be taken with a machine or by hand.

 

 

 

 

 

 

 

 

 

Describe the following methods of carrying out investigations for foundation design:

  1. Desk Top Study
  2. Utilities Search
  3. Walk over study
  4. Hand dug trial pit
  5. Machine dug trial pit
  6. Bore Hole
  7. Auger Hole
  8. Window Sampling

 

You should link your report to the kind of information you expect to find, such as:

  1. Soil type
  2. Physical obstructions
  3. History of site, such as previous use or archeological finds
  4. Load bearing capacity of soil
  5. Water table depth
  6. Chemical make up of the soil, including the presence of sulphates

 

You could also discuss when you might need to carry out a certain type of subsoil investigation along with the relative cost. You should include a soil sample Template as part of your report.

 


Click here for the class notes on P2