220/180KN Left Thread T30/16 Self Drilling Hollow Bar For Ground
Engineering
Hollow Bar System consists of fully threaded steel bar sections,
couplers, nuts and drill bits. It can be drilled and grouted into
loose or collapsible soil without a casing. The bar sections
feature a hollow center that allows for a simultaneous drilling and
grouting operation.
Hollow Bar serves as a drill rod. It is fitted with a lost drill
bit at the front that can be adapted to different ground
conditions. After each single bar section of 1 to 6m, the
subsequent bar is coupled to the previously installed section.
During drilling, cement grout is injected into the hollow core of
the bar using an injection adapter that is mounted on the drill
rig. The cement grout exits at the bottom end through openings in
the drill bit. The injected grout initially serves as slurry to
stabilize the borehole and ensures the efficient flushing of the
drill spoils. Once the grout reached strength it bonds the bar to
the ground.
Once the required installation depth has been reached, the hollow
bar serves as a steel tendon and can carry out its function as a
soil nail, rock bolt or pile upon the grout reaching its required
strength.
Anchor bolt
Anchor bolt means a rod that transfers the structures or
geotechnical load to a stable rock formations,
it consistsof rod, drill bit,coupling, plate, grouting stopper and
nut. It has been widely used in tunnling,
mining,slope stabilization, tunneldiseasestreatment and roof
supporting of undergroundworks. It is for
loose ground(clay, sand friable etc.) Hollow anchor rod is made of
seamless tube with high strength.
Features of Hollow Grouting Anchor Bolt:
Hollow design, implement the grouting tube function, avoid the
mortar loss when the traditional grouting
tube pulled out.Grouting full, and can achieve the pressure
grouting to improve project quality.
Center is good, mortor can wrap the bolt body together, so that it
can avoid corrosion to achibe along
term supporting purposes.
Easy installation, without onsite processing of threads. It can be
easily installed an plate, nut.
Selt-Drilling Anchor Bolt Description
It may bodies drilling, grouting and anchoring as a whole.
It has a wide specifications. Diameter:25-130mm.
Qucik and easy construction, high efficiency.
Used invious surrounding rocks.
Anchor Bolt
T-Thread Anchor Bolt Technial Data
Bar Type | Outside Diameter (mm) | Inside Diameter (mm) | Cross section (mm2) | Ultimate Load KN | Yield Point KN | Weight (kg/m) | Thread Left/ Right Hand |
30/11 | 30 | 11 | 446 | 320 | 260 | 3.3 | Lift or right |
30/14 | 30 | 14 | 395 | 260 | 220 | 2.9 | Lift or right |
30/16 | 30 | 16 | 382 | 220 | 180 | 2.7 | Lift or right |
40/16 | 40 | 16 | 879 | 660 | 525 | 7.0 | Lift or right |
40/20 | 40 | 20 | 726 | 539 | 430 | 5.6 | Lift or right |
52/26 | 52 | 26 | 1337 | 929 | 730 | 10.0 | Lift or right |
73/53 | 73 | 53 | 1160 | 1630 | 970 | 12.3 | Lift or right |
73/56 | 73 | 56 | 1094 | 1414 | 785 | 11.1 | Lift or right |
73/45 | 73 | 45 | 2265 | 1630 | 1180 | 17.8 | Lift or right |
