On the morning of January 9, the right tube of the Zhangfang Tunnel on the Shanan Expressway was successfully holed through, making it the first tunnel on the entire Shanan Expressway to achieve a single-tube breakthrough and laying a solid foundation for opening to traffic on schedule.

　　Located in Contract Section A7, the Zhangfang Tunnel is the first tunnel in the Nanping section of the Shanan Expressway to start excavation and is also a key controlling project on the entire line. The left tube is 1,541 meters long and the right tube is 1,530 meters long, with a maximum excavation span of 15.56 meters and an excavation cross-section of 118.31 square meters. The surrounding rock is mainly Grade IV and V, fractured and structurally complex, making construction difficult and safety risks high.

　　Sheng Changchang, project manager of the Shanan A7 Project Department of the Third Engineering Co., Ltd. of China Railway 14th Bureau Group, said: "Excavation of the Zhangfang Tunnel began on March 16, 2023. By combining multiple advanced geological prediction methods such as ground-penetrating radar, TSP and advanced horizontal drilling, we conducted comprehensive judgment and analysis of geological conditions, identified adverse geological conditions, their nature and scale in advance, strengthened ventilation and monitoring of toxic and harmful gases during construction, and enhanced tunnel monitoring and measurement. We overcame all difficulties and completed the tunnel breakthrough 60 days ahead of the original schedule."

　　The Shanan Expressway project is a key construction project in Fujian Province and has been included in the national expressway network. Once completed, travel time from Shaxian to Nanping will be shortened from 2.5 hours to within 1.5 hours, which is of great significance for strengthening regional cooperation and complementarity, implementing the rural revitalization strategy, and promoting the revitalization of old revolutionary base areas and former Central Soviet areas.

　　Ma Wenhua, deputy general manager of Wusha Company, said: "The Nanping section of the Shanan Expressway, a provincial key project, is 93.5 kilometers long, with 73 bridges totaling 18 kilometers and 9.5 tunnels totaling 16.6 kilometers. In Shunchang County there are 65 bridges, about 13 kilometers, of which 55% has been completed, and 8.5 tunnels, about 15 kilometers, of which 50% has been completed. For quality and safety management measures, we first adopted an integrated agent-construction and supervision model, which improved efficiency and strengthened supervision control. The entire project fully implements standardized management to ensure construction quality."