[Shantou Bay Tunnel Ludao No. shield machine off the production line] On February 21, 2023, a Tunjima shield machine with the pattern of a brave tiger shark painted on the cutter head was completed and rolled off the production line smoothly. This is a domestically produced large-diameter mud-water balance shield machine jointly built by China Railway 14th Bureau and China Railway Construction Heavy Industry Group. It will be used in the construction of the Shantou Bay Tunnel on the Shantou Guang'ao Port Area Railway, and will soon start a journey through the sea. Shantou Guangao Port Railway is located in Shantou City, Guangdong Province. It starts from Shantou Station of Guangmeishan Railway in the north and ends at Guangao Port in the south. The Guangzhou-Macao Port Area Railway Line 1 has a total length of 17.116 kilometers, including a tunnel, two bridges and other construction content. The Shantou Bay Tunnel is a key and difficult control project of the project, with a total length of 9965 meters, of which the shield section is 2990 meters long. The segment has an outer diameter of 12.9 meters and an inner diameter of 11.8 meters. The excavation diameter of the cutter head of the Tunnel Tunneling Machine on the Gudao Island is 13.42 meters, the total length of the shield machine is 126 meters, the weight of the whole machine is about 3,300 tons, and the total installed power is 9,300 kilowatts. The shield cutter head has the functions of normal pressure tool change, hob exchange, hob wear detection, speed detection, and temperature detection. In order to deal with the problem of low construction efficiency in hard rock formations, the distance between cutterheads and cutters of the shield machine has been further reduced, and pressure hobs have been added to help improve rock breaking efficiency. The cutter head is equipped with a total of 185 cutters, of which 89 can be replaced under normal pressure, realizing full coverage of the cutter head's excavation trajectory. Editor / Zhao E

Click to see more live >>

• 2024.05.09 16:57
• [Chongqing approved five wind power projects]
• The recently released "Jiangsu Province Carbon peak carbon neutral pilot construction plan" pointed out that the two-stage goal of carbon peak carbon neutral pilot construction: by 2025, the pilot construction work has made positive progress, and the initial formation of a number of operable, replicable and scalable innovative measures and reform experience; By 2030, remarkable progress will be made in various pilot projects for green and low-carbon transformation, key tasks, projects and reforms will be completed on schedule, and breakthroughs will be made in the application of green and low-carbon technologies. Editor/Xu Shengpeng

• 2024.05.09 16:57
• [Qinghai has optimized the allocation of clean energy in 15 provinces and cities]
• It was learned from the State Grid Qinghai Provincial Electric Power Company that in order to promote the high-level consumption and large-scale transmission of clean energy, Qinghai accelerated the integration into the national unified large market construction, explored the cross-provincial and cross-regional new energy power trading mechanism, and used the large power grid to dock with 15 provinces and cities such as Shandong, Chongqing, Shanghai, Henan, Jiangxi, etc., to achieve the optimal allocation of clean energy in Qinghai. Non-water renewable energy power consumption responsibility weight ranked first in the country. Editor/Xu Shengpeng