en.Wedoany.com Reported - The first layer excavation of the underground powerhouse at the Xixingchong Pumped Storage Power Station in Wuhu, Anhui, was successfully completed on June 16, 2026, marking a key milestone since the start of the main project construction.

The underground powerhouse is known as the "heart" of a pumped storage power station, and its construction quality and precision directly affect the overall construction quality and subsequent operational efficiency of the station. The underground powerhouse of this project adopts a top-down layered excavation and support construction process, with the entire project divided into seven layers (I to VII) for stepped construction. The powerhouse is designed with an excavation length of 203.5 meters, a maximum excavation span of 28.3 meters, and a total excavation depth of 59.7 meters. The first layer completed is the top arch layer, with an excavation height of 9.3 meters. This is the first core procedure in the construction of the underground powerhouse and serves as the primary gateway for controlling subsequent construction safety, process interface, and achieving a high-quality project.

The Xixingchong Pumped Storage Power Station is located in the Yijiang District of Wuhu City, Anhui Province, with a total installed capacity of 1.2 million kilowatts. It is a key pumped storage project under China's 14th Five-Year Plan. Once completed, the project will primarily undertake tasks such as grid peak shaving, valley filling, frequency regulation, and emergency backup. It is expected to absorb approximately 1.6 billion kilowatt-hours of off-peak electricity annually, provide about 1.2 billion kilowatt-hours of peak electricity, save approximately 300,000 tons of coal consumption, and reduce carbon dioxide emissions by over 1.2 million tons. The successful completion of the first layer excavation has created preconditions for subsequent layered excavation, rock wall beam construction, and electromechanical installation at this pumped storage power station.

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