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Which one of the following is correct in respect of pore water pressure u and effective stress σ, in the soil just below the bottom of a pond due to a 2 m rise in water level in the pond?
  • a)
    u increases by 20 kN/m2 and σ remains unaltered
  • b)
    u increases by 20 kN/m2 and σ decreases by 20 kN/m2.
  • c)
    u decreases by 20 kN/m2 and σ remains unaltered
  • d)
    Both u and σ remain unaltered
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which one of the following is correct in respect of pore water pressur...
The rise in water level in the pond causes equal increase in total stress and pore pressure so effective stress does not change. The pore pressure will increase by 20 kN/m2.
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Most Upvoted Answer
Which one of the following is correct in respect of pore water pressur...
A) u and effective stress are independent of each other.

This statement is incorrect. Pore water pressure and effective stress are interdependent. Pore water pressure affects the effective stress of soil and vice versa. An increase in pore water pressure reduces the effective stress and can lead to soil liquefaction or slope instability. On the other hand, a decrease in pore water pressure increases the effective stress and can lead to soil consolidation. Therefore, u and effective stress are not independent of each other.
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Which one of the following is correct in respect of pore water pressure u and effective stress σ, in the soil just below the bottom of a pond due to a 2 m rise in water level in the pond?a)u increases by 20 kN/m2and σ remains unalteredb)u increases by 20 kN/m2and σdecreases by 20 kN/m2.c)u decreases by 20 kN/m2and σremains unalteredd)Both u and σremain unalteredCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the following is correct in respect of pore water pressure u and effective stress σ, in the soil just below the bottom of a pond due to a 2 m rise in water level in the pond?a)u increases by 20 kN/m2and σ remains unalteredb)u increases by 20 kN/m2and σdecreases by 20 kN/m2.c)u decreases by 20 kN/m2and σremains unalteredd)Both u and σremain unalteredCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following is correct in respect of pore water pressure u and effective stress σ, in the soil just below the bottom of a pond due to a 2 m rise in water level in the pond?a)u increases by 20 kN/m2and σ remains unalteredb)u increases by 20 kN/m2and σdecreases by 20 kN/m2.c)u decreases by 20 kN/m2and σremains unalteredd)Both u and σremain unalteredCorrect answer is option 'A'. Can you explain this answer?.
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