GATE CE 2018 Set 1 — Question 56
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Geotechnical Engineering → Consolidation → Compression Index
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Question
The void ratio of a soil is at an effective normal stress of kPa. The compression index of the soil is . In order to reduce the void ratio to , an increase in the magnitude of effective normal stress (in kPa, up to one decimal place) should be ______
Correct answer
416 to 420
Solution
Given:
Initial void ratio,
Final void ratio,
Initial effective stress, kPa
Compression index, The relationship between change in void ratio and effective stress is given by:Where Substituting the values:The increase in effective normal stress is:Rounding to one decimal place, the increase is kPa.
Initial void ratio,
Final void ratio,
Initial effective stress, kPa
Compression index, The relationship between change in void ratio and effective stress is given by:Where Substituting the values:The increase in effective normal stress is:Rounding to one decimal place, the increase is kPa.
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