Project Introduction: Located in the ZCB1-15/16 project section of the Ningpan section of the Yanjiang Expressway, it is the exit end of the volcanic tunnel. The total investment is about 31.1 billion yuan. The right line is 3,675 meters long, and the left line is 3,660 meters long. It is an important pilot project of the "Research and Development Center of Automated Operation Technology in the Transportation Industry" of the Ministry of Transport and a strategic project of Shudao Group to implement "intelligent construction". The left line of the volcanic tunnel is 7,145m long, and the right line is 7,192m long. The tunnel has a complex geological structure with rock bursts, karst caves, fault fracture zones, and other adverse geological conditions.