The behaviour of electrical resistivity correlated with converted SPT-N results from seismic survey

摘要

Conventional soil investigation method to derive strength parameters incorporates borehole sampling which is reliable but is invasive, time consuming, and costly. Alternatively, in this study, seismic surface wave method and electrical resistivity survey were utilized to estimate the soil strength parameters. Some drilling work along the seismic and electrical resistivity lines were carried out where samples were then brought to the laboratory and tested for the related index properties. All the data were then analyzed and correlated. The correlation study shows the relationship between inverted SPT-N (using OYO Seislmager and Pickwin software) with field electrical resistivity produced a regression value, R~2 of 0.4696. The comparison of both field and converted SPT-N yield a result of R~2 value of approximately 0.84. Finally, the relationship of moisture content (MC) with field resistivity and plasticity index with field resistivity resulted in regression values of R~2= 0.433 and R~2= 0.3156 respectively.