On February 21, the Qingdao Metro Line 8 Branch Line saw new progress: on the right line of the Haiwen section (Haier Avenue Station–Wenzhou Road Station section), the "Jiaozhou Bay No. 10" shield tunneling machine was successfully launched, giving the construction of the Metro Line 8 Branch Line an accelerated start in the Year of the Dragon.
The "Jiaozhou Bay No. 10" launched this time was constructed by the Third Construction Branch of Qingdao Metro Group Co., Ltd., and undertaken by China Communications Construction Company Limited and CCCC Second Highway Engineering Co., Ltd. It is the 10th shield tunneling machine launched on the Qingdao Metro Line 8 Branch Line, with a total length of about 85 meters. The shield machine will pass through multiple major risk sources, including the Jiao-Huang Railway, Yunxi River, and the Yunxi River Bridge on Quanzhou Road. The maximum longitudinal gradient of the line is 25‰. It will tunnel eastward with a slight northward deviation to Haier Avenue Station, completing an approximately 1.9-kilometer "underground journey," and it is also the longest section of the Metro Line 8 Branch Line that passes beneath the main urban area of Jiaozhou City.
Under the guidance of the Qingdao Municipal Public Utility Engineering Quality and Safety Supervision Station, the Third Construction Branch of Qingdao Metro Group Co., Ltd. led all participating units in careful study and thorough deployment. In the equipment selection stage, detailed analysis was carried out based on factors such as section geology and construction risks, and an expert team was organized to fully demonstrate and study the selection and finalization of the shield machine; in the equipment manufacturing stage, a shield supervision team was established to station at the factory for whole-process supervision, strictly controlling the acceptance checks for factory delivery and launch; in the equipment entry and assembly stage, shield launch work was managed via checklists, a right-line shield operation team was established, and responsibilities were assigned to individuals, successfully achieving the shield launch goal.
In the launch preparation stage, the construction unit CCCC Second Highway Engineering Co., Ltd. carried out in-depth study of the "first lesson" on work safety at the start of construction, made special arrangements for shield machine launch matters, and continuously strengthened the application of the "four news": at the shield launch end, the builders created an 11.4-meter-diameter "steel sleeve," adding ample safety assurance for shield tunneling; customized special cutters were designed for the shield machine to meet the needs of tunneling in complex strata, a coordinated lifting system with multiple high-load cranes was adopted to improve tunneling work efficiency, an intelligent laser guidance system was used to control the shield machine's tunneling direction in real time, and a segment forming quality monitoring system was used to reduce segment assembly errors. The application of multiple intelligent devices and advanced integrated technologies provided strong technical support for the efficient, high-quality, and safe construction of the metro tunnel, ensuring a "stable start" and "good start" for construction production in the first quarter.
评论 （0）