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
Electrical Geophysical Soil Test - Answer-- Measures electrical resistance through soil
- Effected by water and ion concentration: More water less resistance. (Clay soils have
the most ions)
Ground Water Table - Answer-- Very Important to know where it is!!
- Effects soil bearing capacity
- Changes with seasons
- Determining water table depth = existing well
Planning for Dewatering System - Answer-- Need to know elevation of ground water
and Permeability of soil
Compaction - Answer-- Improves soil engineering properties
- Process of increasing soil density by removing air from void space
Consolidation - Answer-- Increases the density of saturated (cohesive) soil by expulsion
of water from void spaces.
- Takes months years
Consolidation vs Compaction - Answer-Compaction is quicker than Consolidation,
Consolidation happens over time
Four basic compaction forces - Answer-- Static weight
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Scholarsstudyguide. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.87. You're not tied to anything after your purchase.
