Abstract:
The SR-836/I-95/I-395 Signature Bridge is a noteworthy infrastructure upgrade project currently under construction in downtown Miami. Among many firsts, it is the most significant FDOT project to date to utilize augercast piles to support elevated roadway structures in the state of Florida, with a total of more than 2,000 piles, some battered, with 30-inch to 36-inch diameters and installed to depths in excess of 100 feet.
As part of an extensive testing and QA/QC program, eleven dedicated piles were load-tested, using both the dynamic drop-hammer (CAPWAP) method as well as the bi-directional static load test (BDSLT) method. The intent was to correlate the dynamic load test results (which were also performed on 5% of the production piles) to the static load test results.
This set of data presents a unique opportunity to compare the analysis methods used in CAPWAP and BDSLT to generate an estimate of the static top-down load-settlement behavior of the pile. The results of all eleven tests are qualitatively compared.