Dam foundation high-pressure grouting structure

The utility model discloses a dam foundation high-pressure grouting structure. Dam foundation high-pressure grouting structure includes the grout hole of seting up from dam foundation basement rock surface downwards, and this grout hole upper portion is equipped with only starches the structure, and this grout hole sets up in joint crack or crushed zone department, the grout pipe passes only starch the structure, and the exit end setting of grout pipe is in the grout hole of only starching the structure below, the removable hood is heavy, is supported in the basement rock top by the backup pad, and is equipped with the prevention of seepage baffle between backup pad and the basement rock upper surface. The utility model discloses under the prerequisite that does not influence high-pressure consolidation grouting quality for construction progress, effective reduce cost not only have the advantage of " there have the lid to be heavy " and " the uncovered is heavy " grout technique concurrently, have overcome the shortcoming of the two moreover, while reasonable in design, simple process, convenient operation.