Meilong Railway Mao Gongzhai Tunnel runs through

Correspondent Ma Yahui

On July 24th, the Mei (Prefecture) Long (Sichuan) Railway Mao Gongzhai Tunnel undertaken by the Twelfth Bureau of China Railway and the Mao Gongzhai Tunnel was 15th in advance, becoming the first 2000 -meter -high -level growth tunnel in the entire line. The Meilong high -speed rail was completed and opened to traffic.

Meilong Railway Mao Gongzhai Tunnel

The total length of the Meilong Railway is about 93.9 kilometers. It is connected to the existing Meishan high -speed rail and the west and the Gan -Shenzhen high -speed rail. An important traffic artery connecting the Guangdong -Hong Kong -Macao Greater Bay Area. There are 52 tunnels across the Meilong Railway, including 5 tunnels above 2000 meters. The total length of Mao Gongzhai Tunnel is 2047 meters, with a relative height of more than 100 meters. The length of the ⅴ ⅴ ⅴ accounted for more than 90%, mainly with weak and broken enclosure rocks, and the construction difficulty.

During the construction, there was a large -scale slump in the imports of the Mao Gongzhai Tunnel. The exit of the tunnel was affected by the partial pressure terrain, and it was difficult to enter the cave. The builder was set up in the "tofu dregs" geology. Through measures such as construction anti -slip piles, advanced tube sheds, temporary ranging arching and other measures, they innovatively applied to complete machinery and equipment such as the tunnels such as the tunnel and the lining vehicle of the Yangong arch, and implemented measures such as large -locking, radial grouting and high -pressure rotary spray pile reinforcement. On the basis of a solid strata, the tunnel safety excavation was achieved, and the construction section of the fault, shallow buried section and shallow burial bias successfully passed the tunnel safely and smoothly.

The mileage section of the Meilong Railway undertaken by the Twelfth Bureau of China Railway is located in the Meizhou area of ​​the eastern Guangdong. The construction of the local masses has been further promoted through the railway construction, and the development of related industries such as the production and distribution of infrastructure materials and the transportation of material transportation has been gradually formed. The service industry chain system has continued to drive the development of local economic and transportation infrastructure, creating new opportunities for Meizhou's rural revitalization, new urbanization and foreign trade development.

The victory of the Mao Gongzhai Tunnel broke the bottleneck of the entire construction of the Meilong high -speed rail, marking the new stage of the Meilong Railway construction into the last kilometer -level difficulties. After the completion of the Meilong Railway, the traffic time from Meizhou to Guangzhou will be shortened from the original 6 hours to 1.5 hours. It will greatly improve the transportation conditions from Meizhou to the Pearl River Delta. The convenient channel in the region is of great significance to improve the national medium and long -term high -speed railway network.

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