Recently, the right tube of Fenglin Tunnel on the Hegang-Taiqing section of the Hegang-Harbin Expressway was successfully holed through, marking another major milestone breakthrough following the holing-through of the tunnel's left tube on November 7 last year. With this, Fenglin Tunnel has achieved the important milestone goal of full dual-tube holing-through.

Fenglin Tunnel is located deep in the Jinshantun forest region of Yichun City. The tunnel has a cumulative single-tube length of 957 meters and is a separated twin-tube tunnel. Since construction began, the project office, in light of actual conditions such as the narrow construction site, poor geological conditions at the tunnel portal, complex surrounding rock geology (including fractured zones), and winter construction, has worked closely with the design, supervision, and construction units to scientifically assess construction risks and formulated a construction plan of ensuring ten-day targets to secure monthly targets. By adopting methods such as excavators combined with weak blasting, wet-shotcrete robotic arms, follow-pipe construction, and intelligent monitoring, the construction progress has been steadily advanced. At the same time, close attention has been paid to key locations and important links of high-risk construction, on-site safety inspections have been strengthened, and comprehensive hazard identification and rectification have been carried out regularly for mechanical equipment, small machines and tools, fire safety facilities, and other items, ensuring construction quality and safety and completing the phased tunnel construction targets as planned.

Fenglin Tunnel is the shortest of the three tunnels on the Hegang-Taiqing section of the Hegang-Harbin Expressway. Through continuous exploration and innovation during construction, it has accumulated rich practical experience and a large amount of mature technology for the entire project.