Civil Engineering - Irrigation - Discussion
Discussion Forum : Irrigation - Section 1 (Q.No. 21)
21.
For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is
Discussion:
8 comments Page 1 of 1.
Ayaz said:
4 years ago
What is critical gradient? Please explain.
(1)
Sajid rehman said:
4 years ago
Critical gradient:
When the effective stress is zero, the gradient is sometimes referred to as the critical gradient, and since the zero effective stress conditions occur when the gradient is 1. 0, the critical gradient is 1.0. The zero effective stress condition under upward flow conditions is also referred to as a "quick" condition.
When the effective stress is zero, the gradient is sometimes referred to as the critical gradient, and since the zero effective stress conditions occur when the gradient is 1. 0, the critical gradient is 1.0. The zero effective stress condition under upward flow conditions is also referred to as a "quick" condition.
(1)
Gajan Rana said:
8 years ago
And exit Gradient must be 1/5 to 1/6 of critical Gradient.
Ihdhu said:
7 years ago
Exit gradient must be less than 1/7 i.e., 1/6 to 1/7.
Ghulam Ullah said:
6 years ago
It should be between 1/4 to 1/5 not 1.
Pramit Samanta said:
5 years ago
Fine sand - 1/6 to 1/7.
Medium sand - 1/5 to 1/6.
Coarse sand - 1/4 to 1/5.
Sand mixed with gravel 1/4 to 1/5.
Medium sand - 1/5 to 1/6.
Coarse sand - 1/4 to 1/5.
Sand mixed with gravel 1/4 to 1/5.
Bis said:
5 years ago
Fine sand : 0.14-0.17.
Course sand : 0.17-0.2.
Shingle : 0.2-0.25.
Course sand : 0.17-0.2.
Shingle : 0.2-0.25.
Bini said:
4 years ago
What is a critical gradient? Explain.
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