The Oldest Forms of Trenches Technology
Pipe jacking involves the use of a rigid pipe thrust into the ground using hydraulic jacks. Material from the face of the excavation is removed using conventional tunneling tools such as picks, shovels, or jack hammers. Conventional tunneling differs in the construction of the protection system. Wood rib lagging, shotcrete and stamped steel liner plate are all materials placed as the tunnel is excavated and the material installation does not require the use of a jacking frame. Both pipe jacking and utility tunneling methods are still used today due to their adaptability in certain situations. Tunnel boring is a newer form of tunneling where the workers operate a rotating head at the leading edge of the tunnel. The dirt is removed with conveyors, carts or a small auger driven spoil tube. Tunnel boring is today’s newer and easier form of tunneling.
