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10 Cards in this Set
- Front
- Back
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What is the process of geotechnical/environmental drilling? |
Gathering soil, rock and water samples below surface for Environmental assessments. |
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Characteristics of a hollow stem auger. |
It is 3"-12" in diameter and 5ft in length Acts as a casing Stays in the ground until the hole is complete |
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Split spoon sampler characteristics |
Standard penetration test (SPT) Samples all soils, not rock or clay 140 lb. Hammer 30" of travel Each blow is 6" up until 18" Indirect indication of soil density |
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Installing a monitoring well |
I foot of concrete to secure casing Depth of hole = 10 feet Screen and riser assembly = 12 feet (screen = 2 feet) Depth of grout column = 6 feet 1 foot below ground Depth to top of sand pack from ground level = 7 feet 1 foot above the screen |
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Which properties of cuttings influence effectiveness? |
Viscosity Density |
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What is the process of water well drilling? |
Constricting borehole to obtain clean, potable water |
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Geotechnical drilling! |
Why? To ensure structures are safe and stable Where? Wherever construction activities occur When? Preceding any construction Who? RDB Graduate |
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Environmental Drilling! |
Why? To assess environmental concerns Where? Wherever people and their activities impact the environment When? At the planning stage - before environmental concern occurs and after the fact Who? Licensed well technician RDB Graduate |
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Water well drilling! |
Why? To sustain life Where? Wherever there is life When? Whenever there is a need for a constant supply of clean fresh water Who? Licensed well technician RDB Graduate |
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Mineral exploration! |
Why? To find economical mineral deposits What? The process of gathering core samples Where? All over the world When? Whenever demand exceeds supply Who? RDB Graduate |
