双“龙”潜海超级工程的挑战与创新

xinwen.mobi · 发表于 2025-9-8 07:40:08

双“龙”潜海超级工程 likely refers to the Jintang Submarine Tunnel of the Yongzhou Railway, which uses two super-large-diameter shield machines to掘进 towards each other under the sea. The project faces numerous challenges and innovations as follows: ChallengesComplex geological conditions: The Jintang Submarine Tunnel has the characteristics of being the longest, deepest, with the highest water pressure, and the most complex geological conditions. It needs to pass through 28 changes in hard and soft strata, and the strength of the hard rock is as high as 200 MPa or so.High water pressure problem: The maximum burial depth of the tunnel under the sea is 78 meters, and the maximum water pressure is 8.4 bar, which poses a great test to the waterproof and pressure-resistant performance of the tunnel structure.Difficulty in shield machine hoisting and assembly: The shield launching working well is 58 meters deep, which is the deepest large-diameter shield launching working well in China at present. The hoisting difficulty is high, and the construction period is long. For example, it takes 1.5 hours for a crawler crane to hoist a component from the ground to the well and back to the ground, which is 2-3 times more than that of a normal project.High-precision docking requirement: The two shield machines need to be docked under the sea, and the central axis docking error does not exceed 20 mm. The docking accuracy requirement is extremely high.Difficulty in disaster prevention and rescue: As a super-long submarine tunnel, once an accident occurs, the disaster prevention and rescue work is extremely difficult due to the complex environment and high water pressure under the sea. InnovationsSpecial shield machine design: The "Yongzhou" and "Dinghai" shield machines are customized according to the project characteristics. They have a length of about 135 meters, a maximum excavation diameter of 14.57 meters, and a weight of 4350 tons. They are equipped with 308 special cutters. For the first time globally, they use a hob wear intelligent monitoring system, and their cutter head wear resistance and rock-breaking ability are stronger.Innovative hoisting and transportation methods: An exclusive transfer vehicle for shield machines in narrow spaces is designed. Components are assembled on the ground and then hoisted into the well as a whole, and then transported to the designated position by the transfer vehicle, which saves a lot of time and labor.Advanced geological exploration means: Advanced exploration means such as 3D geophysical exploration,海上钻探平台, and geological exploration AI management system are used to increase the drilling sampling density in the sea area where the tunnel is located, providing a reliable basis for the design and construction of the tunnel.Optimization of tunneling parameters and slurry ratio: Through continuous attempts, a set of reasonable tunneling parameters are summarized, and the slurry ratio is optimized to improve the slag-carrying capacity of the slurry, ensuring that the cut stones can be smoothly discharged through the pipeline and improving the tunneling efficiency.Innovative construction technology: The construction technology of open-cut top-down shield launching working well excavation and top-down structure construction in ultra-deep hard rock strata is researched, and a new type of standardized, modular, and reusable truss formwork system is innovatively developed, doubling the operation efficiency.

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双“龙”潜海 超级工程的挑战与创新

双“龙”潜海 超级工程的挑战与创新

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双“龙”潜海超级工程的挑战与创新

双“龙”潜海超级工程的挑战与创新