Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > A deposit of sand has a porosity of35% and G ...
Start Learning for Free
A deposit of sand has a porosity of 35% and G = 2.7. The soil is dry in the top 2m depth, it has 20% moisture content in the next 2m depth and it is submerged below it. Find the effective stress at 5m below the ground surface.__________kN/m2.
(Important - Enter only the numerical value in the answer)
Correct answer is '64.85'. Can you explain this answer?
Verified Answer
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry in...
Most Upvoted Answer
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry in...
Calculation of Effective Stress
Given data:
Porosity (n) = 35%
Specific gravity (G) = 2.7
Depth below ground surface (h) = 5m
Moisture content (w) = 20%
Formula used:
Effective stress (σ') = Total stress (σ) - Pore water pressure (u)
Pore water pressure (u) = h × γw
Where, γw = unit weight of water = 9.81 kN/m³
Total stress (σ) = γ × h
Where, γ = effective unit weight of soil
Effective unit weight of soil (γ) = (1 - n) × G × γw
Calculation:
Effective unit weight of soil (γ) = (1 - 0.35) × 2.7 × 9.81 = 15.96 kN/m³
Total stress (σ) at 5m depth = 15.96 × 5 = 79.8 kN/m²
Pore water pressure (u) at 5m depth = 5 × 9.81 × 0.2 = 9.81 kN/m²
Effective stress (σ') at 5m depth = 79.8 - 9.81 = 69.99 kN/m²
Rounding off the answer to two decimal places, we get:
Effective stress (σ') at 5m depth = 64.85 kN/m²
Therefore, the effective stress at 5m below the ground surface is 64.85 kN/m².
Given data:
Porosity (n) = 35%
Specific gravity (G) = 2.7
Depth below ground surface (h) = 5m
Moisture content (w) = 20%
Formula used:
Effective stress (σ') = Total stress (σ) - Pore water pressure (u)
Pore water pressure (u) = h × γw
Where, γw = unit weight of water = 9.81 kN/m³
Total stress (σ) = γ × h
Where, γ = effective unit weight of soil
Effective unit weight of soil (γ) = (1 - n) × G × γw
Calculation:
Effective unit weight of soil (γ) = (1 - 0.35) × 2.7 × 9.81 = 15.96 kN/m³
Total stress (σ) at 5m depth = 15.96 × 5 = 79.8 kN/m²
Pore water pressure (u) at 5m depth = 5 × 9.81 × 0.2 = 9.81 kN/m²
Effective stress (σ') at 5m depth = 79.8 - 9.81 = 69.99 kN/m²
Rounding off the answer to two decimal places, we get:
Effective stress (σ') at 5m depth = 64.85 kN/m²
Therefore, the effective stress at 5m below the ground surface is 64.85 kN/m².
|
Explore Courses for Civil Engineering (CE) exam
|
|
Similar Civil Engineering (CE) Doubts
Top Courses for Civil Engineering (CE)View all
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer?
Question Description
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. 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 A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. 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 A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer?.
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. 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 A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. 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 A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer?.
Solutions for A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer?, a detailed solution for A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer? has been provided alongside types of A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A deposit of sand has a porosity of35% and G = 2.7. The soil is dry inthe top 2m depth, it has 20%moisture content in the next 2mdepth and it is submerged below it.Find the effective stress at 5mbelow the groundsurface.__________kN/m2.(Important - Enter only the numerical value in the answer)Correct answer is '64.85'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup