Dam foundation high-pressure grouting structure and method

The invention discloses a dam foundation high-pressure grouting structure and method. The dam foundation high-pressure grouting structure comprises a grouting hole formed from the dam foundation bed rock surface downwards, a grouting pipe and a movable landside seepage berm. A grout stop structure is arranged on the upper portion of the grouting hole. The grouting hole is formed in a joint fissure or a crushed zone. The grouting pipe penetrates through the grout stop structure. The outlet end of the grouting pipe is arranged in the grouting hole below the grout stop structure. The movable landside seepage berm is supported by a supporting plate on the bed rock. An anti-seepage partition plate is arranged between the supporting plate and the upper surface of the bed rock. The dam foundation high-pressure grouting structure and method accelerate construction, effectively lower the cost on the premise of not affecting high-pressure consolidation grouting quality, have the advantages of both the landside seepage berm grouting technology and landside-seepage-berm-free grouting technology, overcome the defects of both the technologies, and are reasonable in design, simple in technology and convenient to operate.