Abstract: Based on the hydrogeological and engineering geological conditions of the Dehou reservoir area, the curtain grouting field tests were conducted at the right bank of the reservoir for the mitigation the large quantity of grouting slurry loss that pumping of slurry at various locations. The objective of the insitu curtain grouting tests is to optimize the grouting parameters. The techniques used in the curtain grouting tests are top of borehole sealed, inner circulation, and sectional grouting by plugging from top of the borehole down to the bottom. This paper analyzes the problems encountered during the grouting tests and “lesson learned” suggestions are also provided. The results indicate that the curtain grouting can effectively reduce the seepage in the bedrock.

Key words: Curtain Grouting, Field Test, Groundwater Injection Tests, Effectiveness Analysis, Dehou Reservoir