en.Wedoany.com Reported - Recently, the cumulative tunnel excavation along the entire line of the Sichuan Chuanzhusi to Wenchuan Expressway project has surpassed 10,000 meters, marking that this national key expressway project, which connects Sichuan, Gansu, and Qinghai and empowers the development of the Greater Jiuzhai cultural tourism region, has entered a phase of accelerated construction, improved quality, and enhanced efficiency.
The Chuanwen Expressway, located within Aba Prefecture, spans a total length of 199 kilometers, with a total tunnel length of 135.5 kilometers. The bridge-tunnel ratio along the entire line reaches as high as 93.4%, making it the project with the highest bridge-tunnel ratio among expressway projects exceeding 150 kilometers in Sichuan Province. Over 76% of the tunnels need to be excavated through soft rock strata such as metamorphic sandstone-slate and metamorphic phyllite, posing significant construction challenges.
In response to the complex geological conditions, all participating parties have comprehensively upgraded tunnel construction management and control, implementing "one-on-one" special supervision for 10 ultra-long tunnels, shifting management focus to the frontline and allocating resource elements to the tunnel face. The smart management and control system applied on-site conducts real-time assessment of geological risks and automatically issues warnings for hazards such as collapses and mud inrushes. Intelligent large-scale machinery operations are promoted for tunnels over 3 kilometers along the entire project line, increasing the average monthly advance per single tunnel face by 20% and reducing the number of workers by 60%.
As of now, construction has commenced on 32 tunnels of the Chuanwen Expressway, with 71 tunnel faces advancing simultaneously. Among them, all 10 ultra-long tunnels exceeding 5 kilometers have achieved multi-face construction. A total of 89 physical construction points have been initiated, with the main works fully underway.
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