65 How Massive Undersea Tunnels Are Built – Inside the Offshore Mega Engineering Process

Описание: Discover how the Shenzhen–Zhongshan Link was built in this in-depth documentary featuring clear technical narration and real construction sound design. This next-generation offshore megastructure connects major cities across the Pearl River Delta and showcases one of the most advanced bridge and tunnel manufacturing process projects ever completed in China.
In this video, we break down the offshore manufacturing process behind deep-water foundations, massive steel box girder assembly, and the installation of immersed tunnel elements beneath busy shipping lanes. You’ll see how engineers coordinated heavy marine equipment, precision alignment systems, and high-capacity concrete operations to ensure structural stability under extreme environmental loads. Each stage of the manufacturing process is explained step by step, from seabed preparation and caisson placement to superstructure erection and final roadway finishing.
With detailed narration, this episode reveals the full-scale manufacturing process of a hybrid sea bridge and tunnel system—demonstrating how modern offshore construction technology transforms complex design into operational infrastructure.
00:00 Channel Intro (16 seconds)
00:16 Phase 1 – Offshore Surveying, Seabed Preparation and Dredging
01:45 Phase 2 – Deep-Water Foundations and Caisson Installation
03:20 Phase 3 – Main Bridge Superstructure and Steel Box Girder Assembly
05:15 Phase 4 – Immersed Tunnel Fabrication and Installation
07:05 Phase 5 – System Integration, Deck Finishing and Safety Infrastructure
08:25 Final Phase – Project Completion, Opening and Modern Traffic Operations
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