The main body construction of Dawangdong No. 2 Tunnel of Yangxin Expressway, an important highway in western Guangdong, has been completed

On October 14, the Yangchun to Xinyi Expressway construction project announced a significant milestone: the final segment of the secondary lining concrete for the left tunnel of the Dawangdong No. 2 tunnel has been completed. This achievement marks the overall completion of the 1,400-meter-long Dawangdong No. 2 tunnel, laying a solid foundation for the expressway’s timely opening.

Upon completion, the Yangchun-Xinyi Expressway will create a fast corridor connecting Central Western Guangdong to the southern regions of the Guangdong-Hong Kong-Macao Greater Bay Area. This development is expected to significantly reduce travel time between Yangchun and Xinyi, greatly enhance local road freight capacity, and improve travel conditions for residents along the route. It also plays a crucial role in strengthening Guangdong’s expressway network and advancing strategic initiatives from the provincial government related to rural revitalization.

The Dawangdong No. 2 tunnel is financed by China Railway Southern Investment and constructed by China Railway Sixth Group. Located in the town of Dapo in Gaozhou City, the left line of the tunnel spans 712 meters with a maximum depth of 91 meters, while the right line measures 688 meters with a maximum depth of 91.5 meters. As a key component of the project, the completion of this tunnel sets the groundwork for the subsequent construction of the Panshuitang Bridge and Bantanling Bridge.

China Railway Sixth Group noted that the tunnel traverses soft, high-deformation sections, with the surrounding rock categorized as Level IV and V, making construction particularly challenging and risky. As of now, excavation of the Dawangdong No. 2 tunnel has reached 100% completion, with interior lining also at 100%. A remaining stretch of 767.5 meters involves water channels and cable troughs. The secondary lining work is being executed based on a principle of prioritizing drainage prevention followed by integrated arch wall lining, utilizing a full-face hydraulic template system for window pouring.