Pipe Applications
>>
Auger boring is one of the trenchless transition alternatives. Compared to other systems, it is a much older method than others. Basically, it is applied by pushing the pipe into the tunnel opened horizontally from one of the pits opened at the entrance and exit points to the other. Although steel and concrete pipes are generally used with this method, concrete pipes are losing their use day by day and are replaced by steel pipes. We can divide the auger boring method into two: guided auger boring and unguided auger boring.
The unguided method is one of the oldest known systems. First of all, a shaft is opened at the entrance point where the machine and equipment can fit. If there is no obstacle for the shaft location, it is generally opened as 2 times the machine length. The reason for this is that the machine will be placed behind the pipe it will drive underground. In other words, the order of arrangement is arranged as pipe (in spirals), machine and support wall, starting from the front of the tunnel face. Spirals placed inside the pipes outside the shaft carry the excavation from the inside along the pipe as the pipe is driven underground and collect it by throwing it into the pit through the discharge gap at the front of the machine.
The thrust force applied in each project varies depending on the diameter of the pipe driven and the structure of the ground. In essential cases, friction-reducing and lubricating chemicals can be administered outside the pipe. With its equipment with 840 tons of pushing power, Deltek can underground pipes up to 72” (~1830mm) diameter using the auger boring method.