🚀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

As a new season on Oak Island begins, the team begins to search for lost tunnels identified on multiple old maps while further excavation of the swamp begins. | The Curse of Oak Island

39K views · 142 reactions | AFP: Tunnels found beneath houses in Marawi | NewsWatch Plus Philippines | Facebook

Do ancient temples in Gujarat have secret underground tunnels underneath them? Do these underground passages stretch for hundreds of miles? Is there a vast subterranean area built by ancient builders of India? In this video, I show you undeniable evidence of an ancient underground network in India. | Praveen Mohan

Drill and blast method is one of the most flexible tunnelling methods in hard rock. This method can be performed in wide variety of geological condition, in any tunnel shape and dimension. Design of the drill and blast pattern is an important part of this method. Ground borne vibration, air blast and fly rock are important factors that should be considered in the design along with more common parameters such as advance rate, powder factor, drill factor, maximum instantaneous charge, rock mechani

The drill and blast method in tunnelling involves drilling a series of holes in a precise pattern, then filling them with explosives to break and remove rock. The design of the drill and blast pattern is crucial, as it determines the effectiveness and safety of the operation. It factors in rock type, tunnel size, and desired fragmentation. Proper sequencing and timing of blasts are essential to minimise vibration, control overbreak, and maintain the tunnel's structural integrity. Follow us at tu