Umbrella arch system application has become widespread in tunnel opening in risky areas and poor ground conditions. In order to prevent the risk of damage to the buildings on the tunnel route, umbrella arch system of appropriate diameter is preferred. The pipe diameter to be used affects both the economy and the duration of the project. The 4 inch steel pipe is used in umbrella arch application by integrating with special drilling machines. The pipe diameter to be used affects the cost and duration of the project. While a special drilling machine is required in the application of a 4-inch steel pipe umbrella belt, it is possible to place the pipes with smaller diameters in the tunnel phase by means of a drilling equipment connected to the excavators. Choosing the appropriate steel pipe diameter is important in meeting the loads and stresses in front of the tunnel
Two wings model of Pilot Bit which is choosed by soil condition.
We are able to produce any size bits and ballistic, semi-ballistic or spherical button type diamonds on your demands.
Three wings model of Pilot Bit which is choosed by soil condition.
Three wings model of Pilot Bit which is choosed by soil condition.
It is the connecting part used to extend the Umbrella Pipe which is insufficient for long-length drilling operations.
It is a Ring Bit model which is designed for two wings Pilot Bit.
It is used by welding with ring bits. As the ring bit moves through the soil, the umbrella pipe settles in the soil. Then the strength is ensured by concreting the inside.
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