en.Wedoany.com Reported - On April 19th, the upstream cofferdam cutoff wall and curtain grouting project at the Mengdigou Hydropower Station was completed 11 days ahead of the original plan. The project cumulatively completed 2,918 square meters of cutoff wall trenching, 2,801.5 cubic meters of concrete pouring, and 4,802.11 meters of grouting. This provides seepage control assurance for the safe passage of the flood season and subsequent construction at the power station.
The Mengdigou Hydropower Station is located at the border of Jiulong County in Ganzi Prefecture and Muli County in Liangshan Prefecture, Sichuan Province. The reservoir's normal water storage level is 2,254 meters, with a total storage capacity of 885 million cubic meters. The station is situated in a high mountain gorge with complex geological conditions and strict seepage control requirements. Coupled with unfavorable factors such as low winter temperatures and strong winds, construction faced tight schedules and pressure on quality control.
To address these challenges, the construction team optimized its organization, utilized the dry season window, and employed a combination of rotary drilling and percussion drilling methods to enhance efficiency. During the first quarter, 24-hour continuous operations were implemented, with management personnel stationed on-site for supervision and technical personnel optimizing processes to ensure progress and quality. Through meticulous control of key construction procedures and dynamic adjustment of parameters, difficulties such as trench formation in complex strata and grouting density were resolved.
The early completion of the project has strengthened the cofferdam's seepage control system, improved water retention stability, and laid the foundation for flood season protection and subsequent foundation pit excavation and dam construction. The project will continue to advance subsequent construction phases, strictly controlling quality and safety.
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