Service Cases
The company specializes in the research and development, sales, application, and technical services of engineering materials in the field of safety of engineering structures such as hydropower dams, high-speed railways, and subway tunnels.
Changlongshan Pumped Storage Power Station
2025-04-11
Project Name: Changlongshan Pumped Storage Power Station Water Diversion Tunnel Lining Foundation Chemical Grouting Treatment
Material Application: HK-G-2 low-viscosity epoxy grouting material, LW water-soluble polyurethane grouting material, MB-EQ impact-resistant epoxy mortar
Treatment Results: During the water filling process of the No. 2 water diversion tunnel, the ball valve, public water supply pipeline, technical water supply pipeline, maintenance drainage pipeline and equipment were inspected, and no leakage was found. The maintenance drainage system equipment can operate reliably, the operation procedures are reasonable, the quality of the installation of relevant pipelines and valves meets the design requirements, and the water filling rate of each stage meets the design requirements; below the elevation of EL626m of the third-level water filling, the drainage gallery of the underground powerhouse, the water diversion and drainage gallery, and the stoppers of No. 4 and No. 6 branch tunnels were inspected, and no obvious water seepage was found. Above the elevation of EL626m, during the water filling and pressure stabilization period, inspection of the No. 2 water diversion system showed water seepage between the concrete and rock fissures above the manhole in the flat section (average 0.44L/S), and water seepage at the stopper of the No. 2 branch tunnel. After discussion among the four participating parties, it was determined that the chemical grouting content would be determined based on the leakage situation revealed by the water filling and drainage test of the foot water supply system, and high-pressure chemical grouting would be carried out for targeted seepage prevention. HK-G-2 low-viscosity epoxy grouting material was used for grouting. After grouting, a water pressure re-inspection was carried out, which met the design requirements, and the water diversion tunnel was successfully put into use.
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