Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of Moisture Content and Unit Weight of Clayey Soil Using Resistivity Imaging (RI)
The use of resistivity imaging (RI) in the subsurface investigation has increased in recent years. RI is a non-destructive method and provides a continuous image of the subsurface. Based on the electrical conduction phenomenon of soil, spatial and temporal moisture variation and heterogeneity of subsurface can be evaluated from RI. However, only qualitative evaluation of subsurface can be obtained from RI. Quantification of geotechnical parameters has become an important issue for rigorous use of this method in site investigation. This paper presents a study on quantification of geotechnical parameters of soil from electrical resistivity. Soil samples collected for the tests mostly consisted of highly plastic clay with plasticity index more than 30. The effects of moisture content and unit weight on soil resistivity were determined. It was observed that at a fixed unit weight, soil resistivity decreases significantly with the increase in moisture content up to 40%. Soil resistivity also decreased substantially up to moist unit weight of 15.7 kN/m3 when tested at fixed moisture content. Moreover, test results indicated that specific surface area had significant effect on soil resistivity. A correlation among resistivity, moisture content and unit weight was developed based on the test results.
Determination of Moisture Content and Unit Weight of Clayey Soil Using Resistivity Imaging (RI)
The use of resistivity imaging (RI) in the subsurface investigation has increased in recent years. RI is a non-destructive method and provides a continuous image of the subsurface. Based on the electrical conduction phenomenon of soil, spatial and temporal moisture variation and heterogeneity of subsurface can be evaluated from RI. However, only qualitative evaluation of subsurface can be obtained from RI. Quantification of geotechnical parameters has become an important issue for rigorous use of this method in site investigation. This paper presents a study on quantification of geotechnical parameters of soil from electrical resistivity. Soil samples collected for the tests mostly consisted of highly plastic clay with plasticity index more than 30. The effects of moisture content and unit weight on soil resistivity were determined. It was observed that at a fixed unit weight, soil resistivity decreases significantly with the increase in moisture content up to 40%. Soil resistivity also decreased substantially up to moist unit weight of 15.7 kN/m3 when tested at fixed moisture content. Moreover, test results indicated that specific surface area had significant effect on soil resistivity. A correlation among resistivity, moisture content and unit weight was developed based on the test results.
Determination of Moisture Content and Unit Weight of Clayey Soil Using Resistivity Imaging (RI)
Kibria, G. (Autor:in) / Hossain, M.S. (Autor:in) / Hossain, J. (Autor:in) / Khan, M.S. (Autor:in)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 3398-3407
29.03.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Determination of Moisture Content and Unit Weight of Clayey Soil Using Resistivity Imaging (RI)
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