Auger Drilling (2 types) - answer✔✔- Solid: Dry Regions, auger is removed for sample
- Hollow: Sample through auger, faster, *use in Michigan*
-Dis: Disturbed sample
Rotary Drill (Auger with clay slurry) - answer✔✔- Slurry moves soil up, stabilizes sides by
coating the sides of the hole.
Wash-boring - answer✔✔- Drill with jet water
- Floats material out
- Casing required
- ADV: Small unit
- DIS: Disturbed sample, water content
Cone Penetrometer - answer✔✔- Pushed into ground, records reading
- ADV: provides a continuous record of test results.
- DIS: no lab sample
Drilling Rock - answer✔✔- Hard rock use diamond carbide tip
- RQD (Rock Quality Design): Rock Sample tested to determine strength
Geophysical Soil Tests - answer✔✔- Usually with road work
- Fast quick results, may not be as accurate but good for generalities
- Borings still required to determine soil properties
- Test types: seismic and electrical
Seismic Geophysical Soil Test - answer✔✔- Velocities transmitted through soil
- Greater the density the faster the waves travel
- Sensor picks up waves from explosions
- Dis: Boundaries poorly defined
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