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2 cards from this section. Quick, good the night before a test.
What does the Direct Shear Test measure?
Think about what properties are crucial in soil mechanics.
What are the two key parameters obtained from the test?
Remember the acronym 'CIF' we discussed.
What is the primary goal of the Direct Shear Test?
Focus on what the test specifically addresses regarding soil behavior.
True or False: The failure envelope in a Direct Shear Test corresponds to the shear resistance of a soil.
Think about what happens at the point of failure in soil.
Consider a soil sample that shows a cohesion value of 15 kPa and an internal friction angle of 25°. How would you expect this soil to perform in terms of stability under loading? Discuss.
What happens to soil when subjected to stress relative to its strength?
In a Direct Shear Test, a soil sample fails at a normal stress of 200 kPa with a maximum shear stress of 100 kPa. Calculate the effective cohesion and friction angle, given the water table has significant effects.
Remember to factor in any pore water pressure impacts.
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