What are the technical methods of dam waterproof and plugging?

(1) Water stopping and plugging technology with water: Leakage problems are common in underground buildings and submerged structure. In view of cracks, holes leaking, expansion joints leaking or seeping on the surface of the structure, our company adopts pressure and micro-pressure chemical grouting technology and expansion joint water-stopping technology to stop water and plug leakage in the case of structural seepage, which has a permanent water-stopping effect.

(2) Leaking stoppage technology under pressure: Leaking stoppage under pressure is completed by using a manual hydraulic pump through an injection gun, which involves drilling and twisting on site. Pneumatic (pneumatic) drills and pneumatic picks are used without electricity, and it is extremely safe to operate in situations where flammable and explosive media such as petrochemical production, storage and transportation enterprises and gas pipelines leak. Scope of application: This technology can be used to eliminate the external leakage of equipment, pipes, cutting doors, flanges, walls, welds, threaded connections, stuffing box expansion joints and other parts in petrochemical, electric power, gas supply, metallurgy, coal chemical industry, tap water, medicine, heating, printing and dyeing textiles, paper making, wharf, storage and transportation of storage tanks, food and other industries and departments.

(3) Grouting technology for deep cracks: grouting the deep cracks inside the structure to stop leakage and restore structural integrity, which is also a mature technology that our company has repeatedly applied to mass concrete structures such as dams and floors of high-rise buildings. At present, the deepest crack in grouting treatment has reached 2m. Random sampling core drilling test shows that the compactness and strength of concrete structure after grouting meet the requirements. The patented formula is used for back pressure plugging water pipes, which is useful for back pressure plugging. High-tech waterproof plugging technology is adopted, and polymer waterproof material is injected into the mixed slurry for back pressure, which rapidly expands and solidifies when it meets water. This elastic material is used for long-term impermeability and waterproof sealing of settlement joints in tunnels, basements, civil air defense, subways, tanks, hot wells, military tunnels and so on. The cracks that have been blocked will not leak if there are settlement or dislocation cracks in the future.

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