Drill and blast method is one of the common tunnelling techniques in hard rock. The principle behind the blasting in tunnel is to create a free face at the centre of the tunnel by means of cut holes and then extending the blasting to the full face of tunnel. In simple words, blasting relies on two main factors: 1. shock wave to create cracks in the rock 2. Expansion of gas to move into the cracks to crush the rock. In our online Tunnel Engineering course, you will learn blasting techniques in tu

38K views · 400 reactions | Excavation of tunnel using a roadheader!...

The first Tunnel Boring Machine (TBM) for the T2D Project has been built, tested, approved, disassembled and shipped. ✅ Once the TBM components arrive by ship to Port Adelaide, they will be transported by truck to the Southern Precinct construction site at Clovelly Park. Tilt your phones to watch the video and learn more about these mega machines. #TBM #TunnelBoringMachine #Infrastructure #SouthAustralia #NonStopSouthRoad #T2DProject | Torrens to Darlington Project

15K views · 68 reactions | Watch the moment the tunnel boring machine completes its underground journey and the new watermain reaches the exit point. Installing the watermain underground helps reduce disruptions and keeps the project moving safely and efficiently. Learn more on our website: peelregion.ca/construction/project-14-1240 | Region of Peel | Facebook

CBBT Expansion Update: A tunnel boring machine is up and running again, carving out a new pathway for drivers crossing the Chesapeake Bay Bridge-Tunnel connecting Hampton Roads and the Eastern Shore. In 2023, crews found a ship anchor while tunneling. It took them about 9 months to remove it and do repairs. FULL STORY: https://www.13newsnow.com/article/traffic/cbbt-route-13-expansion-project-back-in-motion-after-construction-repairs/291-2faeb5d2-d5a1-4c13-9ec8-672fb04bcbab | 13News Now - WVEC