Central enterprises in Hunan helped the national major water conservancy project through the Shizhiyang tunnel

2022-05-04 0 By

Hua Sheng Online, February 15 (Correspondent Xu Chang, Zhang Wei, Chen Tianlong) February 13, guangdong Pearl River Delta water resources allocation project, a major national water conservancy project and an important livelihood project in the Guangdong-Hong Kong-Macao Greater Bay Area, ushered in a major progress — the underground shizhiyang tunnel was successfully completed.(The section of the underground shiyang water tunnel was successfully completed.The project is supervised by Zhongnan Consulting Co., LTD., a central enterprise of Power China Central Research Institute based in Changsha, Hunan.The shield tunnel is about 6.6 kilometers long, of which the Lianhuashan channel is about 1.5 kilometers long, with the maximum buried depth of nearly 60 meters and the maximum water depth of 27 meters.It took 595 days and nights to complete the project 212 days ahead of schedule. At this point, the connection between Nansha in Guangzhou and Sha Tin in Dongguan has been completed, laying a solid foundation for the project to complete the water supply by the end of 2023 ahead of schedule.The Pearl River Delta area is known as “geological museum”, especially in the Pearl River mouth shiyang area, hydrology, geological conditions are complex.As the key control line of the whole water resources allocation project in the Pearl River Delta, two 8.65m mixed mud-water balance shield machines are dug from Guangzhou and Dongguan, respectively, and set up GZ21# receiving well on Haiou Island in the Sea area of Lion Ocean to undertake two shield receiving across the river and across the ocean. There are several Lion Ocean fault zones along the line.Faced with multiple challenges such as large buried depth of the line, strong permeability of surrounding rock and difficulty in undersea cutter replacement, it is necessary to overcome many technical problems of deep buried high water pressure tunnel.Centering on the construction goal of “building ecological and intelligent water conservancy projects in the new era” and relying on the expert team of zhongnan Institute headquarters, the Pearl River Delta Supervision Department of Zhongnan Company has solved various problems one by one and got through the key link of tunnel tunneling of pearl River Delta water resources allocation project.Upon completion of the Pearl River Delta Water resources Allocation Project, water will be diverted from the Xijiang River system to the eastern part of the Pearl River Delta, so as to solve the shortage of water in guangzhou, Shenzhen and Dongguan, and provide Hong Kong and other places with emergency backup water resources, thus providing strategic support for the high-quality development of the Guangdong-Hong Kong-Macao Greater Bay Area.