Near surface consolidation grouting, such as dam foundation grouting, and underground consolidation grouting should not follow the same grouting practices. Contrasting methodologies, procedures, and overall general site conditions and space limitations require differences in each process. However, all too often Contract Documents contain language within grouting specifications that dictate near surface grouting processes for use in underground applications. The differences between the two procedures are outlined as well as the governing principles that drive each method. In addition to discussing varying grouting principles, grout mixes, factors affecting cost, and equipment considerations are also discussed.
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