Jiangxi-Shenzhen high-speed railway is an important part of Beijing-Hong Kong high-speed railway, and it is also Jiangxi Unicom. Guangdong-Hong Kong-Macao Greater Bay Area? Main channel. The Jiangxi-Shenzhen high-speed railway starts from Ganzhou West Station in Ganzhou City in the north, passes through Heyuan City, Huizhou City and Dongguan City in Guangdong Province, and finally reaches Shenzhen North Station, with a total length of 436.37 kilometers and a design speed of 350 kilometers per hour. Finally arrived at Shenzhen North Station. After the completion and opening to traffic, Longnan will be integrated into Shenzhen 1 hour economic circle, and Shanghai will realize the whole journey of high-speed rail travel to Shenzhen, which is of great strategic significance for alleviating the transportation pressure of Nanchang-Shenzhen section of Beijing-Kowloon Railway, promoting the deep integration of Jiangxi and Guangdong, giving play to the role of economic radiation in the Pearl River Delta region, and promoting the national economic development planning of Jiangxi, Guangdong and Fujian.
Liu Lei, manager of the Second Division of the Third Bid Section of Jiangxi-Shenzhen High-speed Railway of China Railway 16th Bureau Group, said that the entrance section of Longnan Tunnel is 2,376 meters long, and the geology is mainly granite and sandstone, and the surrounding rocks of Grade IV and V account for 1/3 of the construction tasks. There are many risks in the tunnel body, such as eccentric dangerous rock caving, fault, water inrush, shallow burial, instability of surrounding rock, collapse and so on. In order to ensure the smooth progress of the project, the project department vigorously promotes mechanized supporting construction and small process tools, so as to achieve? Tooling ensures process, process ensures quality, quality ensures safety, and safety ensures efficiency? The construction quality of tunnel lining is ensured.