Besides being used for soil foundation consolidation inhydropower and water resources projects， jet grouting is much morepopularly applied to prevent seepage for these projects. Comparedwith the traditional methods of foundation strengthening， constructionof jet grouted cutoff wall possesses different features andrequirements. For several years， with the great effort of engineers，many jet grouted cutoff walls have been constructed and a plenty ofexperience has been gained in construction of hydraulic structures invarious scales and under complicated geological conditions. In orderto ensure the quality of jet grouting works， this Standard isformulated in line with the characteristics of hydraulic structures.
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