Culvert Repair At Jefferson Barracks National Cemetery

Jefferson Barracks National Cemetery, just south of St. Louis, is one of the nation's largest military burial sites. Established shortly after the Civil War, it covers 331 acres (134 hectares) and 188,000 graves. The cemetery sits on the banks of the Mississippi River, and a planned expansion in 2011 revealed that box culverts running alongside the expansion area were experiencing significant groundwater infiltration.

Jefferson Barracks

URS Group concluded that more than 100 joints would require repair in the 10' wide x 5' tall and 8' wide x 5' tall culverts. Some of the joints had opened as much as 3 inches, causing the rubber water stop to fall out of the joints.

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Limited access was the biggest challenge. All the material, equipment and personnel could only reach the work site through a small number of manholes or the ends of the culvert. Cold weather conditions provided an additional challenge.

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Applied Polymerics was contracted to undertake chemical grouting to seal the leaks and restore the culverts. Given the wide gaps, the activated oakum technique was used: dry oakum was soaked in a hydrophilic polyurethane resin that forms structural foam. This was followed by injection an extremely low viscosity, hydrophilic polyurethane resin. Repaired leaks were then sealed with an epoxy gel.

More than 100 joints were ultimately repaired and fully sealed. No residual leaks remained.

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“More than 100 joints were ultimately repaired and fully sealed. No residual leaks remained”.

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