齐鲁晚报.齐鲁壹点记者王瑞超 12月30日，世界最大直径水下盾构隧道济南黄岗路黄河隧道上层车道板结构施工顺利突破3000米，标志着隧道内部结构施工正式迈入攻坚决胜阶段，为早 日实现隧道通车奠定坚实基础。 济南黄河黄岗路黄河隧道采用双层隧道布置，是国内首条穿黄单洞双层盾构隧道。隧道单洞上下设置六车道通行，可实现两洞隧道的交通功能，单块车道 板横向跨度达13米，厚度0.7米，整体贯穿长度3290米，是隧道内部"梁板柱"结构体系的顶层构件，上层车道板既是承载上层车道车辆通行荷载的"承重脊 梁"，也是管线铺设、通风设备安装等附属设施的承载基础。 据中铁十四局济南黄岗路项目工区经理褚良智介绍：车道板整体浇筑混凝土总量超3万方，体量庞大且工艺复杂。不仅车道板内部预埋构件数量多、种类 杂，精准定位与安装的误差需控制在毫米级，并且受地下空间狭窄的限制，钢筋、混凝土等主要建材无法直接运送至作业面，需通过二次转运调配，耗费 大量人力物力。此外，施工区域需同步开展盾构掘进、防撞石安装、现浇基座浇筑等多道工序，交叉作业密集，各工序间的衔接与协调难度大； 为有效破解施工困局，项目团队秉持"创新驱动、高效建造"的核心理念，引入12台液压 ...

Core Viewpoint - The successful completion of the world's largest underwater shield tunnel, the "Shanhe" shield machine, marks a significant achievement in engineering and construction, showcasing advanced technology and innovative methods in tunnel construction [2][4]. Group 1: Project Overview - The Jinan Huanggang Road Yellow River Tunnel, with a total length of approximately 5.75 kilometers and a shield section of about 3.3 kilometers, is the first single-tube double-layer shield tunnel crossing the Yellow River in China [2]. - The tunnel features a dual-direction six-lane design with a maximum speed of 60 km/h, significantly reducing the average distance between river crossings to 3 kilometers [2]. Group 2: Engineering Challenges - The construction faced significant challenges, including the need to traverse a "suspended river" where the riverbed is 5 meters above the ground level, with the tunnel's lowest point located 54 meters below the riverbed [3]. - The project encountered unpredictable geological conditions, with a large area of "calcium nodules" embedded in the clay layer, complicating the excavation process [7][8]. Group 3: Technological Innovations - The "Shanhe" shield machine, with a diameter of 17.5 meters, was specifically designed to enhance excavation efficiency, achieving a digging speed of 35 mm per minute, surpassing previous records [4][6]. - The machine is equipped with advanced features such as a telescopic main drive and a fourth-generation dual-liquid synchronous grouting technology, enabling real-time monitoring and intelligent decision-making [5][10]. Group 4: Mud Treatment and Environmental Considerations - The project implemented a self-built mud treatment facility capable of processing nearly 600 cubic meters of mud per hour, improving efficiency by 50% and ensuring zero pollution to the surrounding water sources [9][10]. - The innovative "flocculation + concentration + pressure filtration" process was developed to handle the unique challenges posed by the Yellow River's mud layers [10]. Group 5: Construction Coordination - The tunnel's design required simultaneous construction of internal structures within a confined space, leading to the development of a custom combination vehicle to facilitate efficient material transport and construction coordination [11]. - The project team optimized over ten construction processes, resulting in a 60% improvement in internal structure construction efficiency, ensuring the overall progress of the project [11].

Core Points - The Jinan Huanggang Road Yellow River Tunnel has been completed, allowing vehicles to cross the Yellow River in just 5 minutes [1] - The tunnel is approximately 5.75 kilometers long, with a shield section of about 3.3 kilometers, designed for a speed of 60 km/h and features a single-hole double-layer, bi-directional six-lane design, making it the world's largest diameter underwater shield tunnel [3] - The tunnel utilizes the "Shanhe" shield machine with a diameter of 17.5 meters, successfully tunneling beneath sensitive areas such as the Yellow River embankment [3] Economic Impact - The Jinan Huanggang Road Yellow River Tunnel is the first single-hole double-layer shield tunnel crossing the Yellow River, which saves underground space and investment [3] - With a net height of 4.2 meters, the tunnel meets the requirements for public transport, fire, management, and rescue vehicles, significantly enhancing traffic capacity [3] - The tunnel is expected to be operational by the second half of next year, reducing travel time across the river from approximately 30 minutes to about 5 minutes, thereby promoting economic exchange and cooperation between the north and south banks of the Yellow River [3]