Second giant HS2 tunnel boring machine gets ready to start digging under Birmingham, United Kingdom. This is a A team of 90 specialist engineers have completed the assembly of HS2’s giant tunnel boring machine (TBM) which will start digging the second bore of the 3.5 mile Bromford Tunnel into Birmingham next year. In an assembly operation to move sections of the machine into a 12-metre deep launch pit, two 600 tonne cranes lifted the huge 125 tonne cutterhead into place at the front of the 125 m

China's domestically developed, world's largest-diameter vertical shaft boring machine 'Qiming' was officially put into operation in Taicang City of east China's Jiangsu Province on Tuesday, for the Chongming-Taicang Yangtze River Tunnel project. #Trending #ChinaInnovates | CCTV

The drill and blast method in tunnelling involves drilling holes in the tunnel face, loading them with explosives, and blasting to break the rock. The broken material is then removed, and ground support like shotcrete or rock bolts is installed. This process is repeated to advance the tunnel. Join our comprehensive Online Tunnel Engineering course to enhance your skills and expertise in all tunnelling techniques. Register now by clicking the link below! https://tunnel.engineering/register/tunnel

TBM breakthrough into a secant pile reception shaft. When a Tunnel Boring Machine (TBM) is scheduled to break through into a secant pile or diaphragm wall reception shaft, careful consideration must be given to the design and preparation of the shaft. A critical aspect is the incorporation of a soft eye in the shaft wall, which is an area with specific reinforcement arrangement to facilitate the TBM's arrival. This soft eye is engineered to withstand the pressures of tunnelling while allowing th