Question:medium

The critical hydraulic gradient \(i_c\) for a soil with a grain specific gravity \(G\) and a void ratio \(e\) is given by

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For the quick condition, \[ \boxed{ i_c=\frac{G-1}{1+e}. } \] This is one of the most frequently asked formulas in Soil Mechanics.
Updated On: Jul 24, 2026
  • \(\displaystyle i_c=\frac{G-1}{1+e}\)
  • \(\displaystyle i_c=\frac{G+1}{1+e}\)
  • \(\displaystyle i_c=\frac{G+e}{1+e}\)
  • \(\displaystyle i_c=\frac{G-1}{1-e}\)
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The Correct Option is A

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