SRBC(SH:600039) Xin Lang Cai Jing·2025-08-28 02:57Core Viewpoint - The completion of the Yong'an Long Tunnel marks a significant milestone in the construction of the "first red-themed expressway in the country," the Zhan-Guang Expressway, which is expected to enhance transportation and tourism in the region [1][6]. Group 1: Project Overview - The Yong'an Long Tunnel, located in Tongjiang County, is the longest tunnel of the Zhan-Guang Expressway, with a left tunnel length of 6,862 meters and a right tunnel length of 6,825 meters, reaching a maximum depth of 580 meters [3]. - The Zhan-Guang Expressway has a total length of 250.825 kilometers and a total investment of 48.9089 billion yuan, designed for a speed of 100 km/h [6]. Group 2: Construction Progress - Currently, the excavation, filling, tunnel, and pile foundation construction of the Zhan-Guang Expressway from the Sichuan-Shaanxi border to Wangping has exceeded 70%, with the construction of piers and caps progressing past the halfway mark [4]. - The project team has implemented a dual guarantee system of "risk prediction + precise control" to address complex geological conditions, utilizing advanced intelligent equipment for construction [3]. Group 3: Technological Innovations - The project has introduced advanced intelligent equipment, reducing the number of workers in single tunnel operations by 20% and shortening drilling and blasting operation time by 20%, while doubling the efficiency of arch installation [3]. - The use of smooth blasting technology and innovative lining techniques has achieved a lining qualification rate of over 99%, ensuring high-quality construction [3]. Group 4: Economic and Social Impact - Upon completion, the Zhan-Guang Expressway will connect several significant red tourism sites, forming a "3-hour red tourism circle" and improving travel conditions for local communities [6]. - The expressway is expected to inject new momentum into the revitalization and development of the old revolutionary areas in Sichuan and Shaanxi [6].