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Updating ArDOT Liquefaction Evaluation Procedures
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2024-03-01
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[PDF-16.00 MB]
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Edition:Final Report
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Abstract:There is a significant amount of uncertainty when designing piles for bridge foundations in liquefiable soil. Currently, Arkansas Department of Transportation (ARDOT) engineers use a standard penetration test (SPT)-based liquefaction spreadsheet developed 10 years ago to evaluate liquefaction triggering. Since this spreadsheet was developed, updates to the liquefaction triggering procedures have been published, making the spreadsheet out-of-date. In addition, recommendations regarding skin friction and end bearing of piles in liquefiable soils have been published, providing additional guidance regarding the design of these piles. Moreover, additional methods of liquefaction evaluation using the cone penetration test (CPT) and shear wave velocity (Vs) provide additional means of evaluating liquefaction potential. This project plans to update ARDOT’s liquefaction triggering evaluation methodology with the newest procedures and incorporate additional empirical liquefaction hazard estimates such as the liquefaction potential index (LPI). This will provide ARDOT with the tools necessary to design pile foundations in liquefiable soils using the most up-to-date guidance and methods.
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