Chapter 16
Soil Exploration
SOIL SAMPLE AND SAMPLERS
The soil samples can be of two types: disturbed and undisturbed. A disturbed sample is that in which the natural structure of sols get partly or fully modified and destroyed, although with suitable precautions the natural water content may be preserved. Such a sample should, however, be representative of the natural soil by maintaining the original proportional of the various soil particles intact.
An undisturbed sample is that in which the natural structure and properties remain preserved.
(i) Inside Clearance
1<Ci<3
(ii) Outside Clearance
1<Co<2
(iii) Area Ratio (Ar)
Ar < 20% for stiff formation,
Ar < 10% for soft clays
(iv) Recovery Ratio (Lr)
Lr =1 Good recovery
Lr <1 Compressed
Lr <1 Swelled
where,
D3 = Inner dia of sampling tube
D4 = Outer dia of sampling tube
D1 = Inner dia of cutting tube
D2 = Outer dia of cutting tube
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1. What is soil exploration? |
2. Why is soil exploration important? |
3. What methods are used in soil exploration? |
4. How does soil exploration benefit construction projects? |
5. What are the challenges in soil exploration? |
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