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TARGET
SOLVES UNDERWATER GROUTING
PROBLEMS IN SAN FRANCISCO BAY
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San
Francisco
is a beautiful city famous for both the bay it is named after and the
bridges that cross it. As is the case with all bridges, particularly
those over salt water and in very active seismic areas, these structures
needed upgrading. The longest of these bridges is the one between
Richmond and San Rafael.
The upgrading of this structure is a $450,000,000 U.S. project that
requires an extraordinary amount of work on the piers below the low tide
line. This is an environmentally sensitive area and the work had to be
carried out while the bridge was still in service. To address these and
other problems the owner developed a specification for the grout
required in the annular space between the existing pier and the new
seismic collars. Target
Products
got the call to design a grout to meet that design specification and the
placability requirements of the contractor. The result was Target
Anti-washout Grout.
Target
started supplying material in September of 2001 and will continue until
this phase of the project is complete, probably in 2003.
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