Recently, the right tunnel of the Dongkeng tunnel of Jiangxi Tongwu Expressway, which was constructed by the South China Company, was safely penetrated. The Dongkeng Tunnel is a large-section, small-distance tunnel. During the construction process, the project team strictly implemented the "18-character guideline" principle of undercut tunnel construction, strengthened safety management, paid close attention to the quality of the project, strictly organized the process, and realized the connection of the right tunnel of the tunnel.

The Dongkeng tunnel of the project is a large-section, small-distance tunnel with a net span of the same width as the roadbed and a maximum excavation span of 15.53 meters. The entrance of the right tunnel uses a cut-bamboo portal, and the exit uses an end wall portal. The left hole of the tunnel is 230 meters long and the right hole is 172 meters long. It is a short tunnel. The geology of the tunnel is mainly Ⅳ and Ⅴ surrounding rocks with poor geological conditions. The tunnel area is a hilly landform (Ⅱ), with large undulations and high construction difficulty. During the construction process, the project management team strictly implemented the "eighteen-character policy" principle, strengthened safety management, paid close attention to the quality of the project, strictly organized the process, and overcome the small mountain site, the difficulty of material transportation, the shallow burying of the cave entrance and the crushing of the surrounding rock, etc. Affected by unfavorable factors, the smooth penetration of the tunnel was realized.

Keywords: engineering construction, engineering news

The right hole of the Dongkeng Tunnel of the project is the first single-line through tunnel on the entire Tongwu Expressway, which greatly boosted the morale of the project staff and laid a solid foundation for the subsequent construction of the project. The project department will take this opportunity to set off a quick start. The construction climax, and strive to complete the project construction quickly and easily. After the completion of the Jiangxi Tongwu Expressway, the journey from Tongshan to Wuning will be shortened from 2 hours to 1 hour, which is of great significance for effectively strengthening the transportation links between Hubei and Jiangxi provinces and accelerating the economic development of the areas along the route.Editor/Xing Wentao