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Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.
Correct answer is between '2.8,2.9'. Can you explain this answer?
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Previous sand is used in the foundation of a masonry dam such that upw...
Concept:
Critical hydraulic Gradient, icr 
Factor of safety (F.O.S) =
Calculation:
Factor of safety (F.O.S) =
Calculation:Most Upvoted Answer
Previous sand is used in the foundation of a masonry dam such that upw...
Given data:
- Upward hydraulic gradient permissible: 0.345
- Porosity (n) of the soil: 0.40
- Specific gravity (G) of soil solids: 2.65
- Required factor of safety against quicksand condition: between 2.8 and 2.9
Calculations:
1. Determine the effective stress (σ') acting on the sand:
The effective stress is given by the equation:
σ' = γ * H - u
where γ is the unit weight of water, H is the height of the water column above the sand, and u is the pore water pressure.
2. Determine the unit weight of water (γ):
The unit weight of water is given by the equation:
γ = 9.81 kN/m³
3. Determine the height of the water column (H):
The height of the water column is given by the equation:
H = (upward hydraulic gradient) * (height of the dam)
Since the upward hydraulic gradient permissible is 0.345, we need to determine the height of the dam.
4. Determine the factor of safety against quicksand condition (FS):
The factor of safety against quicksand condition is given by the equation:
FS = (σ' / γ) / (n * G)
Solution:
Let's calculate the values step by step:
1. Determine the effective stress (σ') acting on the sand:
σ' = γ * H - u
2. Determine the unit weight of water (γ):
γ = 9.81 kN/m³
3. Determine the height of the water column (H):
H = (upward hydraulic gradient) * (height of the dam)
4. Determine the factor of safety against quicksand condition (FS):
FS = (σ' / γ) / (n * G)
The correct answer for the factor of safety against quicksand condition is between 2.8 and 2.9.
- Upward hydraulic gradient permissible: 0.345
- Porosity (n) of the soil: 0.40
- Specific gravity (G) of soil solids: 2.65
- Required factor of safety against quicksand condition: between 2.8 and 2.9
Calculations:
1. Determine the effective stress (σ') acting on the sand:
The effective stress is given by the equation:
σ' = γ * H - u
where γ is the unit weight of water, H is the height of the water column above the sand, and u is the pore water pressure.
2. Determine the unit weight of water (γ):
The unit weight of water is given by the equation:
γ = 9.81 kN/m³
3. Determine the height of the water column (H):
The height of the water column is given by the equation:
H = (upward hydraulic gradient) * (height of the dam)
Since the upward hydraulic gradient permissible is 0.345, we need to determine the height of the dam.
4. Determine the factor of safety against quicksand condition (FS):
The factor of safety against quicksand condition is given by the equation:
FS = (σ' / γ) / (n * G)
Solution:
Let's calculate the values step by step:
1. Determine the effective stress (σ') acting on the sand:
σ' = γ * H - u
2. Determine the unit weight of water (γ):
γ = 9.81 kN/m³
3. Determine the height of the water column (H):
H = (upward hydraulic gradient) * (height of the dam)
4. Determine the factor of safety against quicksand condition (FS):
FS = (σ' / γ) / (n * G)
The correct answer for the factor of safety against quicksand condition is between 2.8 and 2.9.
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Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer?
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Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer?.
Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer?.
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Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer?, a detailed solution for Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? has been provided alongside types of Previous sand is used in the foundation of a masonry dam such that upward hydraulic gradient permissible on it will be 0.345. Determine the factor of safely required against quicksand condition, if porosity and a specific gravity of soil solids are 0.40 and 2.65 respectively.Correct answer is between '2.8,2.9'. Can you explain this answer? theory, EduRev gives you an
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