Soil Geotechnical Properties Dataset for a Tremor Area of South-West Nigeria
Description
The data contain soil geotechnical parameters collected from nine locations in a tremor area. The Data contain the following featurees: 1. NMC: Natural Moisture Content 2. Gs: Specific Gravity 3. PL: Plastic Limit 4. PI: Plasticity Index 5. LI: Liquidity Index 6. FL: Flow Index 7. TI: Toughness Index 8. G: Gravel 9. CS: Coarse sand 10. MS: Medium Sand 11. F: Fine Content 12. OMC: Optimum Moisture Content 13. MDD: Maximum Dry Density 14. Consistency Limit classification 15. Grain Size Classification 16. Cohension 17. Angle of Friction 18. Coefficient of Compressibility 19. Preconsolidation Pressure 20. Compression Index 21. Swelling Index 22. Recompression Index 23. Coefficient of Compressibility 24. Settlement 25 Permeability
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Steps to reproduce
The data generation and acquisition was mainly based on locations with past records of earth tremor occurrence in Ibadan metropolis in South Western, Nigeria. For the primary data collection, excavation pits were dug in nine different locations at a zone within the study area. The depths of excavation achieved range between 1.5 and 3.0m. The variation in sample depths was influenced by encountering of groundwater level and weathered rock as well as hardpan. The sample location for the primary data was spread across the selected zone. The selection of the spread of sample locations was influenced by a number of factors such as: (i) concentration of built environment (ii) type of exposed soil (iii) ground water level (iv.) accessibility. The secondary data were the results of geotechnical investigations obtained for the purpose of construction in the study area. Thus, the study makes use of soil samples collected around sites with earth tremor history. Both disturbed and undisturbed soil samples were collected from the excavation pits and retrieved from boreholes. Two major stages were involved in this procedure. They are; (i) Field work and observation: this includes collection, description and preservation of sample (ii) Laboratory analyses 3.2 Field Observation For the primary data collection, preliminary visit to the study area was done prior to sampling with a view of identifying appropriate sample location and for ease of access. Due to the nature of the study area, being a built environment, regular interval of distance between sample locations could not be achieved. However, the minimum distance between the sample locations is 25m. The collected samples were subjected to visual identification while the bulk samples were taken for laboratory investigation. The engineering laboratory tests carried out on the samples were: (i) Moisture content determination (ii) Grain size distribution (iii) Consistency limits (iv) Specific gravity test (v) Compaction test (vi) Permeability (vii) Tri-axial and direct shear strength test (viii) Consolidation test
Institutions
- Bowen University