The Delft Sand, Clay & Rock Cutting Model, 2019a

The Delft Sand, Clay & Rock Cutting Model.
16.2.4. MC: Active/Passive Soil Failure 1.
Which of the following statements are true?
The bold green answers are true.
1. Passive soil failure is the failure where the soil is passive, the outside world is active.
2. Active soil failure is the failure where the outside world is active, the soil is passive.
3. Passive soil failure is the failure where the soil is active, the outside world is passive.
4. Active soil failure is the failure where the outside world is passive, the soil is active.
5. The stresses with passive failure are larger than with active failure.
6. The stresses with active failure are larger than with passive failure.
7. Excavating soil in dredging is a typical example of active failure.
8. Excavating soil in dredging is a typical example of passive failure.
16.2.5. MC: Active/Passive Soil Failure 2.
Which of the following statements are true? (Active failure means the horizontal stress is smaller than the
vertical stress, passive failure means the horizontal stress is larger than the vertical stress).
The bold green answers are true.
1. The failure of a dike, because it’s too high, is passive failure.
2. At low tide a quay wall is pushed into to the water, this is active failure.
3. A bulldozer pushes a hole in a dike, this is active failure.
4. A very heavy truck drives over a dike. The dike collapses under the weight of the truck. This is active
failure.
5. Cutting processes in general are an example of active failure.
6. Forces occurring with active failure are always larger than with passive failure.
7. The cutting process of a cutter head is a typical example of passive failure.
8. The cutting process of a clamshell is a typical example of active failure.
16.2.6. MC: Active/Passive Soil Failure 3.
Which of the following statements are true? (Active mode means the horizontal stress is smaller than the
vertical stress, passive mode means the horizontal stress is larger than the vertical stress).
The bold green answers are true.
1. Settled or sedimented sand is in active mode.
2. Settled or sedimented sand is in passive mode.
3. Glacial sand, after the ice has melted is in passive mode.
4. Glacial sand, after the ice has melted is in active mode.
5. Glacial sand, when the layer of ice is the thickest is in active mode.
6. Glacial sand, when the layer of ice is the thickest is in passive mode.
7. Sand with a building on top is in passive mode.
8. Sand with a building on top is in active mode.
16.2.7. MC: Active/Passive Soil Failure 4.
Which of the following statements are true?
The bold green answers are true.
1. The active soil pressure coefficient increases with increasing internal friction angle.
2. The passive soil pressure coefficient increases with increasing internal friction angle.
3. The active soil pressure coefficient decreases with increasing internal friction angle.
4. The passive soil pressure coefficient decreases with increasing internal friction angle.
5. Passive soil failure is the failure where the soil is passive, the outside world is active.
6. Active soil failure is the failure where the outside world is active, the soil is passive.
7. Passive soil failure is the failure where the soil is active, the outside world is passive.
8. Active soil failure is the failure where the outside world is passive, the soil is active.
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