১০০ ফুট নিচে কীভাবে তৈরি হয় মেট্রো সুড়ঙ্গ? | দেখুন সম্পূর্ণ প্রক্রিয়া

১০০ ফুট নিচে কীভাবে তৈরি হয় মেট্রো সুড়ঙ্গ? | দেখুন সম্পূর্ণ প্রক্রিয়া মাটির প্রায় ১০০ ফুট নিচে, যেখানে চারপাশে জমাট মাটি আর পাথরের প্রচণ্ড চাপ—সেখানে একটি বিশাল মেশিন একদিকে মাটি কেটে এগিয়ে যাচ্ছে, আর তার ঠিক পেছনেই তৈরি হচ্ছে কংক্রিটের সুড়ঙ্গের দেয়াল! কিন্তু কীভাবে এই মেশিন মাটি কাটার পাশাপাশি সুড়ঙ্গটিকে ধসে পড়া থেকে রক্ষা করে? ------------------------------------------- How is an underground metro tunnel constructed approximately 100 feet beneath a city? This documentary follows the complete journey of tunnel construction, from the launch shaft and Tunnel Boring Machine (TBM) assembly to excavation, soil removal, and precast concrete tunnel lining installation. Discover how the cutterhead breaks through soil and rock, how hydraulic jacks propel the machine forward, and how laser guidance helps maintain the intended alignment. The journey continues through track installation, electrical power systems, signaling, communication cables, and tunnel ventilation, ending with the first metro train traveling through the completed underground railway. ------------------------------------------- SOURCES & REFERENCES ===================== 1• Tunnel Boring Machine (TBM) Mechanisms: ° The Robbins Company. (n.d.). "Earth Pressure Balance (EPB) TBMs." ° Herrenknecht AG. (n.d.). "Mechanized Tunnelling Technology." 2• Tunnel Lining & Erector System: ° British Tunnelling Society (BTS). "Precast Concrete Tunnel Lining." ° Institution of Civil Engineers (ICE). "Howtunnels are built." 3• Underground Navigation & Laser Guidance: ° VMT GmbH. "Navigation systems for tunnelling machines (TBM)." 4• Subway/Metro Fitting Out (Tracks, Power, Ventilation): ° American Public Transportation Association (APTA). "Transit Infrastructure Guide." ° Rail System Engineering: "Third Rail vs.Overhead Catenary Systems." ° ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers). "Enclosed Vehicular Facilities (Subway Ventilation)." ------------------------------------------- Disclaimer: ========== All content in this video is originally conceptualized, researched, scripted, and produced by the EDUQIS team. Our Journey-Based Education Storytelling videos may use AI, 3D visualization, digital tools, and other production technologies to help illustrate complex concepts, environments, mechanisms, historical events, and educational journeys. Each video is carefully curated, edited, and assembled by our team. The storytelling, creative direction, visual selection, pacing, audio mixing, sound design, background music, and final presentation are developed as part of our original production process. AI and digital tools are used as part of our production workflow to enhance visualization and storytelling. The final video is reviewed, edited, and creatively directed by the EDUQIS team for educational and storytelling purposes. © 2026 EDUQIS. All rights reserved. For business inquiries or copyright matters: [eduqisbusiness@gmail.com] ------------------------------------------- #MetroTunnel #TunnelBoringMachine #MetroRail #Engineering #EDUQIS