地下厂房顶拱开挖 主体工程顺利推进

Core Insights - The construction of the State Grid New Source Liaoning Dayahhe Pumped Storage Power Station has entered a critical phase with the excavation of the underground powerhouse roof, marking the start of the main engineering construction for this key national project with a total investment of 10.958 billion yuan [1] - The project has a total installed capacity of 1.6 million kilowatts, featuring four reversible units of 400,000 kilowatts each, and will connect to the Northeast Power Grid at a voltage level of 500 kV [1] - Upon completion, the power station is expected to generate an annual electricity output of 1.605 billion kilowatt-hours, fulfilling essential tasks such as peak regulation, phase regulation, frequency regulation, energy storage, spinning reserve, and black start [1] Construction Progress - As of now, 62% of the preparatory work for the project has been completed, including the full excavation and support of ventilation and traffic tunnels [2] - The connection road between the upper and lower reservoirs is now open for traffic, facilitating the transportation of construction materials and personnel [2] - The excavation of the underground powerhouse roof and the filling of the cofferdam at the inlet and outlet of the lower reservoir are underway, with the excavation tasks for the upper reservoir progressing as planned [2]