FOREPOLING UMBRELLA ARC SYSTEM
The umbrella arch is a temporary support system forming a structural umbrella from the insertion of an assortment of longitudinal support members installed from within the tunnel, above and around the crown of the tunnel face. The umbrella arch is often considered a pre-support technique as the support members are installed prior to the first pass of excavation. In this manner, the umbrella arch provides support to the ground ahead of and at the working face as well as the unsupported span immediately behind the working face, inside the tunnel.
PILOT BIT
It is the basic equipment that allows digging the soil and moving it through the soil. After the drilling process is completed, it separates from the ring bit and can be used again. Usually a diameter of 89 or 114 mm is preferred.
PILOT BIT 2W
Two Wings
Two wings model of Pilot Bit which is choosed by soil condition.
| DRILLING PIPE | PILOT BIT | THREAD TYPE | ||
| MODEL | OUTER DIA | THICKNESS | OUTER DIA | |
| 2UMB3,5 | 88.9mm | 3-4mm | 80mm | ISO 10208 R32,T38,R38,T45,T51 |
| 2UMB4 | 101.6mm | 4-6mm | 80mm | ISO 10208 R32,T38,R38,T45,T51 |
| 2UMB4,5 | 114,3mm | 6-8mm | 95mm | ISO 10208 R32,T38,R38,T45,T51 |
*We are able to produce any size bits and ballistic, semi-ballistic or button type diamonds on your demands.
PILOT BIT 3W
Three Wings
Three wings model of Pilot Bit which is choosed by soil condition.
| DRILLING PIPE | PILOT BIT | THREAD TYPE | ||
| MODEL | OUTER DIA | THICKNESS | OUTER DIA | |
| UMB3,5 | 88.9mm | 3-4mm | 72mm | ISO 10208 R32,T38,R38,T45,T51 |
| UMB4 | 101.6mm | 4-8mm | 84mm | ISO 10208 R32,T38,R38,T45,T51 |
| UMB4,5 | 114,3mm | 6-10mm | 90mm | ISO 10208 R32,T38,R38,T45,T51 |
*We are able to produce any size bits and ballistic, semi-ballistic or button type diamonds on your demands.
UMBRELLA PIPE ADAPTER
Pin and Box
It is the connecting part used to extend the Umbrella Pipe which is insufficient for long-length drilling operations.
RING BIT
It is commonly used with pilot bit. It remains in the soil after the drilling process is completed.
RING BIT
Two Wings
It is a Ring Bit model which is designed for two wings Pilot Bit.
| DRILLING PIPE | RING BIT | ||||
| INC | MODEL | OUTER DIA | THICKNESS | OUTER DIA | INNER DIA |
| 3,5 | 2UMB3,5 | 88.9mm | 3-4mm | 100mm | 70mm |
| 4 | 2UMB4 | 101.6mm | 6-10mm | 110mm | 70mm |
| 4,5 | 2UMB4,5 | 114,3mm | 6-10mm | 120mm | 76mm |
*We are able to produce any size bits and ballistic, semi-ballistic or button type diamonds on your demands.
RING BIT
Three Wings
It is a Ring Bit model which is designed for three wings Pilot Bit.
| DRILLING PIPE | RING BIT | ||||
| INC | MODEL | OUTER DIA | THICKNESS | OUTER DIA | INNER DIA |
| 3,5 | UMB3,5 | 88.9mm | 3-4mm | 108mm | 50mm |
| 4 | UMB4 | 101.6mm | 4-8mm | 120mm | 60mm |
| 4,5 | UMB4,5 | 114,3mm | 6-10mm | 130mm | 76mm |
*We are able to produce any size bits and ballistic, semi-ballistic or button type diamonds on your demands.
UMBRELLA PIPE
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.