Supply of umbrella / canopy tubes for tunnel fortification
OUR PRODUCTS
UMBRELLA PIPES
Umbrella pipes, also known as canopy tubes, are primarily used in underground works, both in civil engineering and in mining for tunnel openings.
This support element is designed to be used in poor quality soils and rock masses, providing immediate consistency to the ground.
Rotation and percussion are applied to the RING BIT through the PILOT BIT, leaving the CASING SHOE, to which the starter pipe is welded, free. This prevents the pipe from rotating, thus much lowering the torque requirements on the rotation head.
RING BIT welding in our workshop
Installation of Canopy Tubes in the Santiago de Chile Subway
Injection Valves
The tubes may be equipped with 12 mm or 16 mm injection valves for opening pressures of 3 bar and 5 bar respectively.
CEMENT GROUT
Cement grout is generally used to fill the space between the tubes and soil.
A lid is used in the end tube and the filler is applied using the grout. Some clients use tubes with one-way injection valves for higher pressure injections and therefore improve filler quality. Consequently, a better soil reinforcement is achieved.
BRAXIMA
QUALITY CANOPY TUBES
BRAXIMA canopy tubes are made up of high quality steel tubes that range from OD 76.1 mm to OD 139.7 mm with wall thickness ranging from 5.6 to 10 mm. Our RING BITS and PILOT BITS are designed to optimize drilling performance.
The canopy tubes are supplied in custom lengths with normal or double-entry threads to reduce installation time and with 8 mm guide entry to facilitate correct alignment in the assembly process.
BXA76.1 – BXA88.9 – BXA101.6 – BXA114.3 – BXA139.7
Starter tube, Extension tube, End tube
Starter tube, Extension tube, End tube
Ring bit, Starter tube, Pilot Bit
STEEL GRADES
| Steel grade | Yield point (Mpa) |
Tensile strength (Mpa) |
Elongation % |
|---|---|---|---|
| S355 | ≥355 | 490-630 | 22 |
| N80 | ≥552 | ≥689 | 18 |
DIMENSIONS
| Braxima Code | Max. Wall Thickness (mm) |
|---|---|
| BXA76.1 | 8 |
| BXA88.9 | 8 |
| BXA101.6 | 8 |
| BXA114.3 | 10 |
| BXA139.7 | 10 |
| Braxima Code | Casing O.D. | W.T Max. | Ring Bit I.D. | Ring Bit O.D. | Pilot Bit | Thread | Grade |
|---|---|---|---|---|---|---|---|
| BXA76.1 | 76,1 | 8 | 40 | 82 | 58 | R32 | S355/N80 |
| BXA88.9 | 88,9 | 8 | 52 | 94,5 | 70,9 | T38 | S355/N80 |
| BXA101.6 | 101,6 | 8 | 62 | 106,6 | 83 | T38 | S355/N80 |
| BXA114.3 | 114,3 | 10 | 70 | 120 | 92 | T38 | S355/N80 |
| BXA139.7 | 139,7 | 10 | 94 | 148 | 116,7 | T45 | S355/N80 |
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Contact
Don’t hesitate to contact us with any questions you may have. We will try to respond as quickly as possible.