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10 Cards in this Set
- Front
- Back
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What are 3 Engineering properties of Soil? |
Permeability, Consolidation, Shear Strength |
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What are 4 factors that affect permeability |
1) Size/Shape/Uniformity of soil particles 2) Fluid Type 3) Degree of Saturation 4) Pressure Head Difference |
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Define One Dimensional/Two Dimensional Flow |
One Dimensional- When velocity vectors are all parallel and of equal magnitude Two Dimensional- All velocity vectors are confined in a single plane but vary in magnitude and direction |
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What are the two flow types (scale) and define what it means. |
1) Macroscopic- Assumed to be a straight path 2) Microscopic-Travels through winding path through voids |
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When do we use constant head test vs. falling head test? |
Constant head test determines hydraulic conductivity for coarse soils,gravels Falling head test is for fine grained (clays/silts) |
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What does Laplace Equation describe (its main principle)? |
That there is energy loss as water travels through a medium |
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What are 5 assumptions for Laplace Equation? |
1) 100% saturation 2) Constant hydraulic conductivity (homogeneous soil) 3) Incompressible soil/water 4) No consolidation/expansion of soil 5) Laminar flow of water |
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Steps in drawing a proper flow net diagram |
1) Draw a scaled cross section of the situation 2) Draw flow lines 3) Draw equipotential lines 4) Make sure ratio of a to L is equal. In other words, make sure the shape can fit a circle. |
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What are 3 major types of structures? |
1) Gravity Impervious 2) Gravity permeable 3) Sheet pile wall |
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What is the safety for uplift and what are its limits. |
F.S is (Wstructure/Uplift force) >= 1.5->2 |
