the snow-capped mountain, the Yajiang River is running, and the high dam is towering. On the morning of May 24, Huadian Xizang Company held a handover ceremony for donating the world's longest RCC core sample to the National Museum of China at its Xizang DG Hydropower Station.
In the thunderous applause of the world's highest RCC dam at 3451 meters above sea level, a collection certificate with the logo of the National Museum was issued to the power station builder, marking that the "world's longest core" was formally incorporated into the National Museum collection. It adds luster to the current vigorous learning and implementation of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era theme education. How did
the "world's longest" record come into being? What is the collection value of
this concrete core?
The reporter learned from the person in charge of the power station that the RCC core sample donated to the National Museum was 26.2 meters long and 20 centimeters in diameter, and was successfully removed from the dam of DG Hydropower Station on March 26, 2021, breaking the world record for the length of similar core samples, with smooth and dense surface and uniform distribution of aggregates. It runs through 87 thermal lift layers, which is equivalent to 87 layers of concrete "crust" with a thickness of 30 cm. In the process of construction, the majority of builders have bravely climbed the peak of science and technology, adopted the intelligent construction management and application technology system of "digital modeling-coding system-digital transfer", and implemented the dynamic control method of temperature control and crack prevention of RCC dam based on feedback simulation, temperature stress test and direct stress monitoring. It realizes the intelligent control of concrete production, warehouse control, water supply and heat preservation in all time and space of the dam, and effectively solves the problem of precise provention and control of RCC dam cracks under the harsh natural conditions of low temperature, low air pressure, strong wind, large temperature difference and strong radiation. The achievement of this world record objectively reflects that the RCC construction quality and technology of DG Hydropower Station have reached the international leading level, which indicates that China has a complete set of mature construction technology for RCC gravity dam construction in alpine and high-altitude areas, and is a witness of the high-quality development achievements of China's hydropower industry in the new era. After
acquiring the new identity of "National Museum Collection", the core sample will start from the snowy plateau, cross eight provinces and cities, and arrive at the National Museum after a journey of nearly 4000 kilometers, and is scheduled to open to the public in the second half of 2023.
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