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Option 3 : Q and R
Explanation
Skempton’s Pore Pressure coefficient are A and B,
where,
A → depends upon the degree of saturation and over consolidation ratio
B → depends upon degree of saturation of soil
Value of B lies between 0 and 1. For completely saturated soil, B = 1 and for completely dry soil, B = 0.
Value of A may be as large as 2 to 3 for very loose saturated fine sand and it can be less than zero for over consolidated clay.
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