Question
Download Solution PDFWhich of the following factors does NOT affect permeability of soil ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Permeability depends on both soil properties and Fluid properties
The kozney – Carman equation is quite useful, it reflects the effect of factors that affect permeability
\(k = \frac{{{\gamma _w}}}{\mu } \times \frac{{{e^3}}}{{1 + e}} \times D_{10}^2\)
Where,
D10 is effective grain size
e is the void ratio
μ is viscosity , γ w is unit weight of water
a) Grain size: The coefficient of permeability includes D102, where D10 is a measure of grain size
If the void ratio is the same then permeability is more in coarse soil than in the fine soil
b) Void ratio: From the equation, it is clear that k ∝ e2
If the particle size is the same, then loose soils are more permeable than dense soils
c) Degree of saturation: Permeability is directly proportional to the degree of saturation
d) Particle shape: It is expressed in terms of specific surface area and permeability relates to specific surface area as ‘k ∝ 1/S2 ‘
Last updated on May 28, 2025
-> SSC JE notification 2025 for Civil Engineering will be released on June 30.
-> Candidates can fill the SSC JE CE application from June 30 to July 21.
-> The selection process of the candidates for the SSC Junior Engineer post consists of Paper I, Paper II, Document Verification, and Medical Examination.
-> Candidates who will get selected will get a salary range between Rs. 35,400/- to Rs. 1,12,400/-.
-> Candidates must refer to the SSC JE Previous Year Papers and SSC JE Civil Mock Test, SSC JE Electrical Mock Test, and SSC JE Mechanical Mock Test to understand the type of questions coming in the examination.
-> The Staff Selection Commission conducts the SSC JE exam to recruit Junior Engineers in different disciplines under various departments of the Central Government.