Jet Grouting to Construct a Soilcrete Wall Using a Twin Stem Systemby Kenneth B. Andromalos, Geo-Con Inc, United States,
Herff N. Gazaway, Geo-Con Inc, United States,
Abstract: An existing coal loading pier located in Norfolk, Virginia was completed in 1961 for the purpose of loading ocean going ships. It was determined that dredging adjacent to the pier would provide an increase in loading capacity and productivity for pier operations. Since the existing pier is supported by concrete piles, there was a concern that the lateral stability of these piles would be significantly reduced by the sloughing of surrounding support soils into the adjacent dredged areas. To prevent this, a wall of some kind would be required to retain these soils and ensure the integrity of the existing piles. Analysis of data obtained from the extensive project test program, verification section, and production work indicate that the twin stem jet grouting system, in what is believed to be its first U.S. application, yielded a consistent, better quality end product than was produced with a single stem jet grouting system, in addition to substantial production rate increases.
Subject Headings: Soil grouting | Jet grouting | Walls | Piers | Load factors | Soil analysis | Soil stabilization | Concrete piles | Dredging | North America | Virginia | United States | Norfolk (Virginia)
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