Civil Engineering - GATE Exam Questions - Discussion
Discussion Forum : GATE Exam Questions - Section 5 (Q.No. 12)
12.
A river 5 m deep consists of a sand bed with saturated unit weight of 20 kN/m3 . vw = 9.81 kN/m3. The effective vertical stress at 5 m from the top of sand bed is
Discussion:
5 comments Page 1 of 1.
AQIB AHMED said:
4 years ago
Total stress= 20 x 5 = 100.
Pore water pressure = 9.8 x 5 = 49.
Effective stress = 100 - 49 = 51.
Basically, when the water tables fluctuate above the ground surface it will not increase or decrease the effective stress.
Effective stress will increase or decrease when the water table decreases or increases below the ground surface.
Pore water pressure = 9.8 x 5 = 49.
Effective stress = 100 - 49 = 51.
Basically, when the water tables fluctuate above the ground surface it will not increase or decrease the effective stress.
Effective stress will increase or decrease when the water table decreases or increases below the ground surface.
Vaish said:
7 years ago
20 * 5- 5 * 9.81 = 50.95kN/m^2.
Phani said:
7 years ago
Here, it is σ = σ - u.
RAKESH KUMAR said:
9 years ago
Actually, it should be 50.95 KN/M2.
Sadashiva said:
9 years ago
20 * 5 - 9.81 * 5 = 51.95.
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