The invention discloses a construction method for dam anti-seepage curtain grouting, and relates to the technical field of water conservancy and
hydropower engineering.According to the construction method for curtain grouting, construction is conducted according to the principle of sequential densification, a segmented construction method is planned to be adopted, in the same unit, after first-order holes are constructed to be 15 m below
bedrock, later-order holes can be constructed, and the next-order holes can be constructed after the first-order holes are constructed to be 15 m below
bedrock; the method specifically comprises the steps of
pilot hole segmented drilling and
coring, water pressing, grouting and hole sealing, first-stage sequential hole segmented drilling, water pressing, grouting and imbedding, second-stage sequential hole segmented drilling, water pressing, grouting and imbedding, third-stage sequential hole segmented drilling, water pressing, grouting and imbedding, quality inspection hole drilling and
coring, segmented water pressing and full-hole grouting and hole sealing. The dam anti-seepage curtain grouting construction method has the remarkable beneficial effects in the aspects of guaranteeing the anti-seepage performance of the dam, improving the construction efficiency, ensuring the
engineering quality and long-term stable operation and the like, provides a
solid guarantee for safe and reliable operation of a water conservancy project, and has important economic, social and environmental benefits.