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Different drill and blast patterns are employed in tunnels, and their design should be tailored to the specific conditions of the project. Factors such as the type of rock, geological features, tunnel dimensions, and intended use dictate the selection of the most suitable pattern. If you want to learn drill and blast method in tunnelling along with all other tunnelling methods register for our Online Tunnel Engineering course. Link in bio below https://www.tunnel.engineering/challenge-page/51f74

🚀Let’s go! ✅ These two images illustrate crucial stages in tunnel construction and design, from both structural and detailed engineering perspectives. The first provides a cut section view showing how waterproofing, primary lining, and secondary lining are layered to resist both soil and water pressures. Proper sealing, joint design and drainage beneath the invert are taken into account to protect long-term durability and maintain serviceability. The second image is a technical drawing that com