Contribution of geophysical tests to calculate the 1D consolidation settlement of shallow foundations in saturated clays
Volume Title: ICASGE2025
Paper ID : 1067-ICASGE-FULL (R1)
Authors
1Department of Civil Engineering, Faculty of Technology, University of Blida1
P.O.Box: 270 R.P Blida 09000 Blida, Algeria
2University of Blida1
Abstract
Geophysical testing methods primarily measure shear wave velocity in situ. These techniques offer considerable advantages over other geotechnical tests, especially in terms of speed and applicability to all soil types. Notably, despite these advantages, there are currently no established methods for estimating foundation settlement based on geophysical "Downhole" tests. While these tests can provide an estimate of the deformation modulus, which is essential for settlement calculations under the assumption of linear elastic behavior of the soil, they do not directly yield settlement predictions.
This paper introduces a methodology for calculating the settlement of shallow foundations on saturated clay utilizing down-hole tests. It establishes an experimental correlation between the œdometric modulus and the shear modulus derived from compressibility odometer tests and down-hole tests, respectively. A comparative analysis was conducted to evaluate the predicted settlements against those obtained from conventional compressibility tests, which showcased the strong predictive capabilities of the proposed method. Following this analysis, a calibration procedure was applied, resulting in a practical computational tool for estimating the one-dimensional consolidation settlement of clayey soil under shallow foundations.
This paper introduces a methodology for calculating the settlement of shallow foundations on saturated clay utilizing down-hole tests. It establishes an experimental correlation between the œdometric modulus and the shear modulus derived from compressibility odometer tests and down-hole tests, respectively. A comparative analysis was conducted to evaluate the predicted settlements against those obtained from conventional compressibility tests, which showcased the strong predictive capabilities of the proposed method. Following this analysis, a calibration procedure was applied, resulting in a practical computational tool for estimating the one-dimensional consolidation settlement of clayey soil under shallow foundations.
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