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Step inside the world of mega engineering where tunnels are carved through mountains and pipelines are welded with extreme precision. This film breaks down the repeatable tunnel excavation cycle—mesh, shotcrete, rock anchors, drilling patterns, charging explosives, and controlled blasting—then showcases dramatic TBM breakthroughs from hard-rock drives to urban metro tunneling. You’ll also see automated installation of tubular steel ribs, jumbo drill crosscut development, and fully mechanized cable bolting for safer ground support. The second half shifts to infrastructure at scale: HDPE corrugated pipe extrusion, 42-inch automated pipeline welding, CRC Evans copper backup clamps, subsea spool installation, and real-time radiography that accelerates weld inspection. Timeline: 0:00. Mega engineering overview: tunnels + pipelines at extreme scale 0:20. Tunnel support sequence: mesh placement and stabilization 0:47. Shotcrete application: sealing cracks and locking the profile 1:16. Drilling + installing rock anchors for long-term stability 2:17. Face drilling, blast prep, two-component explosives, fuse timing 3:57. TBM arrival and breakthrough moment (mountain exit) 5:24. Heron Connect TBM: 14 m cutter head, 3200 m drive, traditions 6:50. Mumbai Metro Line 3 TBM breakthrough under dense urban geology 8:33. Semi-automatic tubular steel rib support installation + concrete fill 11:00. Automated jumbo drill crosscut + cable bolting + mining cycle 19:34. HDPE double-wall corrugated pipe extrusion line (PLC controlled) 20:35. Automated 42-inch pipeline welding + CRC Evans CBUC clamp workflow 30:19. Subsea spool install, mainline pipeline stringing, bending, tie-ins 38:56. Real-time radiography (RTR) inspection for faster weld verification Hashtags: #TBM #TunnelBoringMachine #Tunneling #Shotcrete #RockBolting #DrillAndBlast #UndergroundConstruction #MumbaiMetro #PipelineConstruction #PipelineWelding #AutomatedWelding #HDPEPipe #PipeExtrusion #SubseaPipeline #NDT #RealTimeRadiography #Engineering #MegaProjects #ConstructionTechnology #HeavyConstruction Please LIKE, your LIKE will ENCOURAGE me very much. Thank you! SUBSCRIBE to watch more great video: https://bit.ly/3aDXZlr