Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion
Discussion Forum : Soil Mechanics and Foundation Engineering - Section 1 (Q.No. 2)
2.
The active earth pressure of a soil is proportional to (where φ is the angle of friction of the soil)
Discussion:
21 comments Page 1 of 3.
ViVEK said:
2 years ago
Ka = (1-sin¢)/(1+sin ¢)
= Cot^2 (Alpha) = Cot^2 (45+¢/2)
=Cot^2 [90-(45-¢/2)]
={Cot [90-(45-¢/2)]}^2
= {tan(45-¢/2)}^2
= tan^2 (45-¢/2)
Kp = (1+sinĀ¢) / (1-sin¢)
= tan^2 (Alpha) = tan^2 (45+¢/2)
=>In active earth pressure failure plane make angle of 45+¢/2 with horizontal .
=>In the Passive earth pressure, failure plane makes an angle of 45-¢/2 with horizontal.
=> Remember that angles are not indicated of Alpha.
In the above formulas, Alpha is the Critical Angle.
= Cot^2 (Alpha) = Cot^2 (45+¢/2)
=Cot^2 [90-(45-¢/2)]
={Cot [90-(45-¢/2)]}^2
= {tan(45-¢/2)}^2
= tan^2 (45-¢/2)
Kp = (1+sinĀ¢) / (1-sin¢)
= tan^2 (Alpha) = tan^2 (45+¢/2)
=>In active earth pressure failure plane make angle of 45+¢/2 with horizontal .
=>In the Passive earth pressure, failure plane makes an angle of 45-¢/2 with horizontal.
=> Remember that angles are not indicated of Alpha.
In the above formulas, Alpha is the Critical Angle.
(10)
Ravi said:
2 years ago
I think this term is also called flow value.
(1)
Joseph Nigus said:
3 years ago
The correct answer is option B.
(1)
Harsh Shah said:
3 years ago
What will be for passive earth pressure of soil? Please explain.
Manoj said:
4 years ago
According to me, Pa is proportional to cot^2(45+π/2).
Mahesh said:
6 years ago
How to calculate the angle? Please, anyone, tell me.
Staffana aishwarya said:
7 years ago
Soil at rest K0 = 1 - sinΠ.
Paul said:
7 years ago
What will be for soil at rest?
Sudipta said:
7 years ago
ka=1/tan^2(45°+Φ/2).
=tan^2(45°+Φ/2).
=flow value.
=tan^2(45°+Φ/2).
=flow value.
Akhil said:
7 years ago
Active earth pressure = 1/(tan2 (45° + π/2)) = tan2 (45° + π/2)
ka = 1/ kp.
ka = 1/ kp.
(2)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers