Find the area ratio for each case and appropriate sample for the given soil characterization tests.

Answer to Problem 17.1P
The area ratio for tube 1 is
The area ratio for tube 2 is
The area ratio for tube 3 is
Explanation of Solution
Given information:
The outside diameter
The outside diameter
The outside diameter
The wall thickness (t) for sample 1 is
The wall thickness (t) for sample 2 is
The wall thickness (t) for sample 3 is
Calculation:
Calculate the inside diameter
Substitute
Find the area ratio for
Here,
Substitute
Thus, the area ratio for tube 1 is
Calculate the inside diameter
Substitute
Find the area ratio for
Substitute
Thus, the area ratio for tube 2 is
Calculate the inside diameter
Substitute
Find the area ratio for
Substitute
Thus, the area ratio for tube 3 is
A soil sample usually can be considered undisturbed if the area ratio is less than or equal to 10%.
- All the given three samples are considered as undisturbed sample, hence, it is suitable for consolidation and unconfined compression test.
- The Grain size distribution, atterberg limits are conducted only when the soil on remolded or disturbed soil, hence, sample disturbance is not a factor.
Thus, the all three samples are appropriate for all tests.
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Chapter 17 Solutions
PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
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