Bulbed Cable Bolt
Functions
Cable bolt could provide higher tensile strength,anti-shearing capacity and incomparable bending capacity,
and could prevent the lateral movement of strata.
Features&Advantages
Plain cable bolt and bulb cable bolt
At the top of the bulb cable bolt, three bulbs to reinforce resin mixing, achieve point anchorage and pretension
The bulbs can be modified in frequency and diameter based on customer’s request, the diameter is 21mm~38mm
Plain or bulbs options available,bulbs available at either 0.5 m or 1 m spacing
Available in single strand or twin strand
Fish hooks fitted to top of cables for retention prior to grouting
Resin could be applied for immediate point anchorage and grout for permanent support
Mechanical Properties
| Item No. | TRCB152 | TRCB178 | TRCB189 | TRCB216 | TRCB218 |
| Diameter(mm) | 15.2 | 17.8 | 18.9 | 21.6 | 21.8 |
| Strands | 1*7 | 1*7 | 1*7 | 1*7 | 1*19 |
| Mass per meter(kg) | 1.1 | 1.5 | 1.73 | 2.24 | 2.48 |
| Cross sectional area(m㎡) | 140 | 191 | 220 | 285 | 313 |
| Steel Grade(Mpa) | 1860 | 1860 | 1860 | 1860 | 1860 |
| Tensile strength(kN) | 260(26.5T) | 335(36.2T) | 409(41.7T) | 530(54.1T) | 583(59.5T) |
| Min 0.2% extension under load(kN) | 229 | 311 | 360 | 466 | 513 |
| Min.Elongation(%) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
Fish Hooks
Expansion shell
Grouting tube
Breathing tube
Bearing plate
Application
Mines
Tunnels
Slopes
Places where need ground support
Length & Package
Length:500mm to 6200mm in pieces or in coils
Package:20 pcs each bundle
As customer’s requirement
How to work
The nature of the ground must be evaluated.
Drill a hole in the area according to bolt diameter, bolt length. The length of hole is 200mm to 500mm shorter than the bolt.
Attach a breather tube to the full length of the bolt. Breather tube protrudes about two meters from the hole.
Attach about one meter of grout tube to the end of the cable bolt with sufficient tail provided to connect to the pump.
Insert the cable bolt and seal the hole to eliminate lose of grout when pumping.
Connect the grout tube to pump and place the breather tube into a container of water when pumping start. We will seethat in the water container that air bubbles will exhaust from the breather tube, when the hole is full of grout, air bubbles will disappear.
Cable bolt can be tensioned after the grout has cured.
