Computer · Geotechnical Engineering
One of the design criteria for protective filter is: D15(filter)D85(protected material) < 5. This criterion ensures:
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- 1the filter removes all soil particles
- 2loss of sufficient head during flow through filters
- 3development of piping condition
- 4no significant invasion of particles from the protected material into the filter✓
Correct answer
no significant invasion of particles from the protected material into the filter
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