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R32 Hollow Anchor Bar for Self-Drilling Anchor System
| Model No. : | R32 |
|---|---|
| standard : | Bs,Gb,Astm,Jis,Api,Din |
Product description
Product Introduction
Hollow anchor bar means a rod that transfers the structures or geotechnical load to a stable rock formations, anchor bolt consists of bar, drill bit, coupling, plate, grouting stopper and nut. Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It’s irreplaceable in narrow construction environment. Hollow anchor bar is made of seamless tube with high strength.
Advantages and Characteristics:
2.Fast drilling and installation, because drilling, installation and grouting are in a single operation.
3.Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bond with the borehole gout.
4.The hollow core not only serves for flushing during drilling, but also for grouting after drilling.
5.Continuous threads ensure the bars can be cut and coupled at any point, or extended.
6.Different anchor bits are available for different ground conditions.
7.Duplex anti-crossin process, hot-dip galvanized and epoxy coating system.
Product Specification
R-Thread Anchor Rod Technial Data
|
|
R25N |
R32N |
R32S |
R38N |
R51L |
R51N |
T76N |
T76S |
|
Outside diameter (mm) |
25 |
32 |
32 |
38 |
51 |
51 |
76 |
76 |
|
Internal diameter (mm) |
14 |
19 |
16 |
19 |
36 |
33 |
52 |
45 |
|
Ultimate load capacity (KN) |
200 |
280 |
360 |
500 |
550 |
800 |
1600 |
1900 |
|
Yield load capacity (KN) |
150 |
230 |
280 |
400 |
450 |
630 |
1200 |
1500 |
|
Tensile strength, Rp0.2 (N/mm2) |
800 |
800 |
800 |
800 |
800 |
800 |
800 |
800 |
|
Yield strength, Rp0.2 (N/mm2) |
650 |
650 |
650 |
650 |
650 |
650 |
650 |
650 |
|
Weight (Kg/m) |
2.3 |
3.2 |
3.6 |
5.5 |
6.5 |
8.0 |
16.0 |
19.7 |
|
Thread type (left-hand) |
ISO 10208 |
ISO 1720 |
MAI T76 Standard |
|||||
|
Steel grade |
En10083-1 (Alloy structure steel) |
|||||||
|
Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical. |
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R thread anchor bar or called rock rod, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.
Thread size: R25, R32, R38, R51, T76.
Thread standard: ISO10208, ISO1720 etc.
T-Thread Anchor Rod 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 |
|
T30/11 |
30 |
11 |
446 |
320 |
260 |
3.3 |
Lift or right |
|
T30/14 |
30 |
14 |
395 |
260 |
220 |
2.9 |
Lift or right |
|
T30/16 |
30 |
16 |
382 |
220 |
180 |
2.7 |
Lift or right |
|
T40/16 |
40 |
16 |
879 |
660 |
525 |
7.0 |
Lift or right |
|
T40/20 |
40 |
20 |
726 |
539 |
430 |
5.6 |
Lift or right |
|
T52/26 |
52 |
26 |
1337 |
929 |
730 |
10.0 |
Lift or right |
|
T73/53 |
73 |
53 |
1160 |
1630 |
970 |
12.3 |
Lift or right |
|
T73/56 |
73 |
56 |
1094 |
1414 |
785 |
11.1 |
Lift or right |
|
T73/45 |
73 |
45 |
2265 |
1630 |
1180 |
17.8 |
Lift or right |
T thread anchor bar surface with a trapezoidal thread, this design of connection is much stronger and reliable when compared with rope thread, we supply full sizes from T30 to T103.
Thread size: T30, T40, T52, T73, T103, T127, T130.
Thread standard: ISO10208, ISO1720 etc.
Product Display
We can produce different sizes, thicknesses, widths and materials according to your requirements
Technology Process
The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.
1. Connect the alloy drill and anchor rod one end, on the other end, connect the drill sleeve and shank adapter, then connect the drilling rig or hand-held drill. Then start drilling, fill the cooling water while drilling.( If you want to lengthen the anchor rod, can connect the coupling, and then drilling)
2. Take down the drill, put the stop-grouting plug into the rod, and insert it to the hole, then ready to grout. Special circumstances like surrounding rock grouting tension is over or surrounding rock is too broken, can use anchor agent to seal the hole.
3. Connect quick grouting coupling and anchor rod end, connect other end of grouting machine.
4. Start grouting, when grouting full and reach design value then power off. Grouting pressure according to the design parameters and grouting machine performance determine, Cement/sand reference values is 1:0 ~ 1:1, water/cement reference value is 0.45:1 ~ 0.5:1.
5. Install anchor plate and nuts, and tighten nuts.
Packaging And Transportation
The packaging is packaged in tarpaulins and wooden boxes to ensure that it will not rust and corrode in the process of encountering water.
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