Micropile compression test setup assumptions could be confirmed, which then allowed the installation of the production micropiles. The two test piles were loaded to 150 tons (1,335 kN), which was 200% of design load. Both test piles were successful in sustaining the applied load. Production rates on this project varied for several reasons, including the weather and the di ff icul ty restocking the construction supplies because everything had to be transported from land. Wind, weather and wave action greatly affected and hindered this operation. Items needing transport, nearly daily, included fuel, several tons of hol low bars (and components), hundreds of tons of cement and, surprisingly enough, thousands of gallons of fresh water (for mixing grout). One of the most frustrating occurrences on the proj e c t wa s when, a l though surrounded by the Atlantic Ocean, work came to an abrupt halt when crews ran out of fresh water. Conclusion After the final micropile was placed, the entire cell was filled with sand to about 18 in (450 mm) below the top of the existing sheetpile wall. The sand was encased in filter fabric to ensure that the sand would not be washed out by the surrounding waters. The filter fabric was then capped with excess grout castings, left over from the micropile installation. The final component of Phase II was the construction of a permanent dock platform to be used in the future. As funds become available, future work on the restoration effort will include placement of additional riprap around the structure. 96 • DEEP FOUNDATIONS • NOV/DEC 2017 Views of the completed surface around the lighthouse William L. Snow, Sr., is the founder and president of Palmetto Gunite Construction, located in Ravenel, S.C. He received a B.S. in civil engineering from Auburn University, is a member of several ACI committees, and has authored numerous construction related articles. William B. Wright, Sr., P.E., is a senior engineer and consultant with Terracon in the Charleston, S.C. office. He received his undergraduate degree in civil engineering and his master’s degree in geotechnical engineering from Clemson University. William L. Snow, Jr., P.E., is a staff engineer for Terracon in the Savannah, Ga. office. He obtained his undergraduate degree in civil engineering and his master’s degree in geotechnical engineering from Clemson University.
