Investigation of bridge foundation sites in karst terrane via multi-electrode electrical resistivity

摘要

Resistivity data was collected on several bridge foundation sites in Pennsylvania, in close proximity to geotechnical boring locations. Earth resistivity tomograms determined from multi-electrode measurements were plotted against drilling data and notable similarities were discovered. Resistivity profiles were found to match layering structure of drilling data in many cases, and resistivity values were indicative of materials observed in boring logs. In addition, resistivities could adequately predict transitions in material and top of rock profile. It appears that multi-electrode electrical resistivity is a useful tool for developing basic layer structure in karst terrane.