en.Wedoany.com Reported - The flood discharge and emptying tunnel of the lower reservoir at the Jiangshan Pumped Storage Power Station in Zhejiang, China, has achieved a full breakthrough. The project, undertaken by China Railway 23rd Bureau Group, marks a significant milestone in the construction of the lower reservoir, creating conditions for subsequent river diversion and closure acceptance and accelerating the main project.
The flood discharge and emptying tunnel is a critical control structure in the construction of the lower reservoir, with functions spanning the entire lifecycle of project construction and later operation. During the construction period, this tunnel primarily undertakes the river diversion task for dam construction, ensuring dry working conditions for the main project. After the power station is completed and operational, it will serve as the core channel for reservoir water release and flood discharge, handling functions such as flood discharge during flood seasons, daily water level regulation, and emergency drainage. It is a key barrier ensuring the flood control safety and stable operation of the reservoir area and surrounding regions.
Facing challenges such as complex geological conditions in the construction area, poor surrounding rock stability, water seepage, and fractured rock layers, the project construction team fully leveraged the role of the Party branch as a fighting fortress and the vanguard and exemplary role of Party members. They scientifically formulated construction plans, dynamically optimized excavation techniques, and adopted full-face excavation methods. For the tunnel entrance, body, and exit sections, the team implemented a comprehensive support system of "systematic rock bolts + shotcrete with wire mesh," and strictly enforced safety risk hierarchical control and quality inspection systems. This efficiently overcame construction difficulties under complex geological conditions, achieving safe, high-quality, and efficient construction throughout the process.
The breakthrough of the flood discharge and emptying tunnel further improves the flood control and drainage system of the lower reservoir and creates favorable conditions for accelerating subsequent main project construction. As a key project under Zhejiang Province's "Thousand Projects, Trillion Investments" initiative, the fully completed Jiangshan Pumped Storage Power Station will enhance the peak shaving, valley filling, and energy storage capabilities of the western Zhejiang power grid, promote regional new energy integration, optimize the energy supply structure, and drive the development of local related industries, injecting strong momentum into the green and low-carbon development of southwestern Zhejiang.
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