Implementation of Electrical Resistivity Imaging Manual
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2023-08-01
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Edition:September 2021–August 2023
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Abstract:Texas Department of Transportation (TxDOT) annually encounters a substantial number of claims and change orders that have a detrimental effect on project costs and schedules. State Departments of Transportation (DOTs) spend approximately $10 million annually on geotechnical-related change orders, accounting for about 7% of the total expenditures associated with claims, change orders, and cost overruns in highway and bridge projects. Insufficient subsurface information and soil mischaracterization significantly contribute to such cost overruns and delays in up to 50% of all infrastructure projects. Inadequate and inaccurate subsurface information results from inherent limitations of conventional geotechnical site investigation methods, as they are unable to provide a continuous assessment of subsurface conditions. Despite the advantages of advanced geophysical methods, such as Electrical Resistivity Imaging (ERI), in enhancing geotechnical analysis, these technologies are underutilized by state DOTs because of a lack of pr etails for different applications, geotechnical conditions, and operational environments.
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