On March 10, the anti-erosion and wear-resistant concrete pouring of the first section of the tunnel spillway of the flood discharge system of Shuangjiangkou Hydropower Station, the world's largest section discharge tunnel under construction by China Railway Construction Bridge Bureau, was completed, marking the beginning of the lining of the tunnel spillway.
Shuangjiangkou Hydropower Station is a key project of national "14th Five-Year Plan" energy development, a key project of national clean energy and national western development. The flood discharge system engineering mainly includes tunnel spillway, deep spillway tunnel, shaft spillway tunnel and emptying tunnel, and its scale is in the forefront of the world. The main tunnel-tunnel spillway is arranged on the right bank of the dam, with a total length of 1818 meters and a maximum excavation section area of 516 square meters. The maximum single-hole flood discharge of the tunnel is 4138 cubic meters per second, and the maximum flow rate can reach 42 meters per second. In the state of extreme flood discharge, the self-weight of the whole cavern will reach 886000 tons. The project has high construction standards and great economic and social benefits, and has been included in the list of "People's Water Control and Centennial Achievements" water control projects published by the Ministry of Water Resources. Trolley deformation monitoring
in the process of
pouring faces the difficult problems of super-large section, super-high flow rate and super-high impact, and the project responds to the challenges with quality and high-quality products. In the early stage of the project construction, a special scientific and technological research class was set up to carry out research projects, and more than 60 groups of concrete mixing schemes were studied and tested. After thousands of groups of test partners, the optimal mix proportion data of abrasion-resistant and wear-resistant concrete with "smooth, wear-resistant and crack-resistant" performance were determined. By introducing the first set of "ethylene glycol + water cooling" pre-cooled aggregate temperature control mixing system in China to control temperature, adopting precise control ratio to reduce hydration heat, and taking effective measures to strictly control quality and safety, the technical problems were successfully overcome; With internal intelligent water supply and surface intelligent maintenance, the smoothness of concrete surface has been greatly improved. Nowadays, "mirror" is not only the standard of flood discharge system of Shuangjiangkou Hydropower Station, but also a synonym for high-quality construction of hydraulic tunnels.
Technicians on-site thermometry
that this year is the "breakthrough year of cohesion" of the Shuangjiangkou Project, which will start with a decisive battle and a sprint. In the labor competition of "cohesion, quick work and ensuring the goal", the project department realizes high-quality construction with the high standard of "top soldier" of railway construction, compacts the main responsibility, seizes opportunities and overcomes difficulties, and quickly sets off a construction climax with the determination and courage to win, so as to ensure the realization of the construction goal. After the completion
of Shuangjiangkou Hydropower Station, the main stream of Dadu River will increase about 6.6 billion kilowatt-hours of electricity in dry season, save about 2.96 million tons of standard coal and reduce about 7.18 million tons of carbon emissions annually, which will actively promote the overall goal of "green development and harmonious coexistence between man and nature".
浙公网安备33010802003254号