The "Three Most" water diversion project in Guangdong will benefit approximately 18 million people
2023-07-13
Starting from the rolling Xijiang River, crossing the Yunkai Mountains and winding the coastal plain, the Guangdong Water Resources Allocation Project around the Gulf of Tonkin, which is under full construction, has entered the construction stage of the main works. It is the inter basin water diversion project with the largest water diversion flow, the longest water transmission line and the highest total investment in Guangdong history. It is an important project to weave the national water network and the Guangdong water resources allocation project around the Gulf of Tonkin. Starting from Dixin Village, Yunan County, Yunfu, on the bank of the main stream of the Xijiang River in the north, and ending at Dashuiqiao Reservoir, Xuwen County, Zhanjiang in the south, the water transmission line is 490.33km long in total, and the total construction period of the project is 96 months. After completion, it will systematically solve the problem of water shortage in four cities in western Guangdong, support the sustainable development of local economy and society, and benefit about 18 million people in western Guangdong. Overcoming multiple technical challenges, more than half of the water transmission lines are tunnels, with complex geological structures and undulating mountains, shrouded in clouds and mist, with occasional rain and sunshine. The mountains stretch across, and the first step is to drill a hole for water diversion. The maximum burial depth of the Yunkai Mountain Tunnel is about 910 meters, with a total length of 64.5 kilometers. The geological structure is complex, and the working environment is harsh, making it the 'eye of the game' of the entire project. "Zhang Jieyi, Deputy General Manager of the West High Management Department of Guangdong Yuehai Yuexi Water Supply Co., Ltd., explained. Explode! "A huge roar came from the silent mountains. On June 12th, the second blasting task was carried out at the Guizi branch of the Yunkaishan Tunnel. Drilling, charging, detonation, slag discharge, initial support, and daily excavation of the tunnel to a depth of 6 meters. The Guizi Branch Tunnel is a transportation tunnel of the Yunkaishan Tunnel, with a total length of 1868 meters. After completion, it will become a transportation channel for personnel and equipment transportation. "Zhang Jieyi introduced," The construction section is on a reverse slope, with water seepage in the mountain, and during the high temperature of summer, the ventilation inside the tunnel is not smooth, which adds many challenges to tunnel excavation. "Looking at the entire line, digging a long-distance tunnel is one of the difficulties that the project needs to overcome. A water transmission line with a total length of nearly 500 kilometers, more than 56.62% of which is a tunnel, traversing high mountains, plains, and basins, with significant terrain fluctuations. "Li Daimao, Deputy General Manager of Guangdong Yuehai Yuexi Water Supply Co., Ltd., introduced," This is equivalent to digging out a huge 'water pipe' in the terrain that is scattered with erosion, weathering, karst, and fractures. The difficulty is unimaginable, and it is easy to imagine the formation of an expert consulting team and the establishment of a doctoral workstation A series of measures have been introduced, including the establishment of seven major research topics and 21 scientific research topics, the creation of labor model innovation studios, and the collaboration with universities and research institutes to carry out scientific and technological breakthroughs. Multiple types of excavation equipment and ultra large flow and high-power centrifugal pumps have been successfully developed, ensuring the safe and efficient excavation of tunnels and the stable operation after construction. The network scheduling of rivers and reservoirs is another challenge for engineering construction. Nearly 500 kilometers of pipelines and 5 large pumping stations connect the main stream of the Xijiang River, many small and medium-sized rivers, and 10 reservoirs to form a huge water supply network. The water receiving area is wide, the water supply line is long, and the working conditions are complex. This requires considering the water regime and potential of different watersheds and regions, as well as coordinating multiple goals such as water supply, irrigation, flood control, and ecological water use. Li Daimao introduced that he is currently exploring the establishment of an engineering intelligent operation and maintenance guarantee system that integrates safety monitoring, emergency support, operation monitoring, and other aspects to ensure scientific and accurate joint scheduling. Optimizing the allocation of water resources will increase the annual water supply by over 2 billion cubic meters
Edit：XiaoWanNing Responsible editor：YingLing
Source：People's Daily
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