8年攻坚 跑马山二号隧道实现左洞贯通

Core Insights - The Yaye Expressway's Kangding bypass section is expected to open by the end of the year, marking a significant milestone in its 8-year construction journey [1] - The project is a crucial part of the national highway network, connecting inland areas to the Tibetan Plateau, with a total length of 17.9 kilometers and a bridge-tunnel ratio of 93% [1] - The completion of the left tunnel of the Maoma Mountain No. 2 tunnel, which is 6.77 kilometers long and located in a geologically complex area, signifies a major advancement in the construction [1] Construction Progress - The Maoma Mountain No. 2 tunnel is noted for its challenging geological conditions, having encountered multiple mud bursts and significant water inflow during construction [1] - The successful completion of the left tunnel demonstrates the feasibility of safe and controllable tunnel construction in active fault zones, clearing major technical obstacles for future work [1] Traffic Impact - Once fully operational, the expressway will reduce travel time through Kangding city from 30 minutes to under 15 minutes, alleviating traffic congestion and enhancing regional transportation capacity [2] - The project is expected to divert approximately 12,000 vehicles daily, significantly improving traffic flow in the area [2]