Design and Construction Technology of High Pressure Jet Grouting for Seepage Prevention and Reinforcement of Reservoir Dangerous Dams
This article takes the anti-seepage reinforcement treatment of a dangerous dam in a certain reservoir as an example to explore the design scheme and construction technology of high-pressure jet grouting.With P.O42.5 cement and water are prepared in a water cement ratio of 1:1.5,and 2%～3%of the mud mass is added as an admixture to improve the rapid setting and impermeability performance of the grouting material.After calculating parameters such as grouting volume and hole spacing,the"three pipe method"is selected for high-pressure jet grouting construction.30 days after the completion of construction,drill core samples from the grouting area and test the performance indicators of the core samples.The compressive strength is between 1.85 and 2.50 MPa,and the density of the core samples is between 1.72 and 1.91 g/cm3,which meets the requirements for hazard removal,reinforcement,and anti-seepage of reservoir dangerous dams.
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