Abstract
Building failure and its resultant loss of lives and properties has brought to light the need to establish relationship between soil layer resistivity and soil bearing strength which can be integrated for more robust foundation studies. The research is designed to study the relationship between the soil bearing capacity and soil layer resistivity to enhance planning and design in the building industry. Soil resistivity and soil bearing capacity were obtained on a land area of 160m by 50m. Vertical Electrical Soundings (VES) using the Werner Array were deployed to acquire resistivity values at three different current electrodes spacing (0.5m, 1.0m and 1.5m) within the study area. The bearing strength of the soil was derived from the tip resistance of the Cone Penetration Testing (CPT) around the points where the VES data were collected. Data for the study were processed and analysed with the aid of JASP and ArcGIS software. The probability value set at 0.005 for the regression statistics conducted was not significant at 0.5 m (0.051) which is the top soil. Significant probability values were obtained at 1.0 (0.001) and 1.5 m (0.001), though with a very low coefficient of determination (R2) of 0.260 and 0.267 respectively. Coefficient of correlation (R) values of 0.328, 0.510 and 0.516 were obtained at 0.5, 1.0 and 1.5 m depths respectively, indicating weak relationship at 0.5 m and moderate relationship at 1.0 and 1.5 m. This explains that higher resistivity equates to higher bearing capacity, especially for 1.0 and 1.5 m where the results were significant. The regression model shows that 10.7%, 26.0% and 26.7% of the variation in the soil-bearing capacity was explained by the soil resistivity at depths 0.5, 1.0 and 1.5 m respectively. This error of estimate is large. The spatial model gives a good lateral explanation and prediction of the relationship between the soil-bearing capacity and the soil layer resistivity. The statistical model is advised to be used in combination with the spatial model due to the large errors involved. These models can be applied in foundation studies for the proper interpretation of soil bearing capacity to enhance planning and design in foundation studies.
Keywords
Array, Building Foundation, Cone Penetrometer, Soil Bearing Capacity, Soil Layer Resistivity, Test, Werner.
Citations
IRE Journals:
Ajibero K. O., Aleke C. U., Oyediran I, Aweda K. A "Modelling Soil Resistivity and Soil Bearing Strength For Foundation Studies" Iconic Research And Engineering Journals Volume 9 Issue 4 2025 Page 1961-1974
IEEE:
Ajibero K. O., Aleke C. U., Oyediran I, Aweda K. A
"Modelling Soil Resistivity and Soil Bearing Strength For Foundation Studies" Iconic Research And Engineering Journals, 9(4)
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