Anchor bolt
Anchor bolt means a rod that transfers the structures or geotechnical load to a stable rock
formations, it consists of rod, drill bit, coupling, plate, grouting stopper and nut. It has been
widely used in tunnling, mining, slope stabilization, tunneldiseases treatment 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 grounting anchor bolt
• Particularly suitable for difficult ground conditions.
• A high rate of installation since drilling, placing and grouting can be performed in one single operation.
• Self drilling system eliminates the requirement for a cased borehole.
• Installation with simultaneous drilling and grouting possible.
• Easy installation in all directions, also upwards.
• Suitable for working in limited space, height and in areas of difficult access.
• Simple post grouting system. • Hot-dipped galvanizing for corrosion protection
Applications in Tunneling & Ground Engineering
• Radial bolting
• Slope stabilization
• Forepoling
• Micro injection pile
• Face stabilization
• Temporary support anchor
• Portal preparation
• Soil nailing
Self-Drilling Anchor Bolt Description
| |
R25N |
R32N |
R32S |
R38N |
R51L |
R51N |
T76N |
| Outside Diameter (mm) |
25 |
32 |
32 |
38 |
51 |
51 |
76 |
| Internal Diameter (mm) |
14 |
19 |
16 |
19 |
36 |
33 |
52 |
| Ultimate Load Capacity (kN) |
200 |
280 |
360 |
500 |
550 |
800 |
1600 |
| Yield Load Capacity (kN) |
150 |
230 |
280 |
400 |
450 |
630 |
1200 |
| Tensile Strength, Rm (N/mm2) |
800 |
800 |
800 |
800 |
800 |
800 |
800 |
| Yield Strength, Rp0.2 (N/mm2) |
650 |
650 |
650 |
650 |
650 |
650 |
650 |
| Weight (Kg/m) |
2.3 |
3.2 |
3.6 |
5.5 |
6.5 |
8.0 |
16.0 |
| Steel Grade |
EN10083-1 (Alloy Structure Steel) |
| Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical. |
Drill Bit
| |
R25N |
R32N |
R32S |
R38N |
R51L |
R51N |
T76N |
T76S |
| diameter(mm) |
41,51 |
51,76,90 |
90,100,110,115,130 |
130,150,160,180,200 |
| Hardened cross bit
(EX) |
Hardened cross bit for loose to medium dense condition with small boulders. |
| Tungsten cross bit
(EXX) |
TC cross bit for soft to medium rock for mations |
| Hardened button bit
(ES) |
Hardened buuton bit for unconsolidated rock with boulders. |
| Tungsten carbon button bit
(ESS) |
Button bit with TC inserts for medium rock for formations. |
| Hardened arch bit
(EC) |
Hardened drill bit with optimized geometry for unconsoliddated soil
with small boulders. |
| Tungsten carbon arch bit
(ECC) |
TC drill bit with optimized geometry for soft to medium rock formations. |
| Hardened drop center bit
(EY) |
Hardened cross bit for loose to medium dense ground conditions |
| TC drop center bit
(EY) |
TC drill bit for soft to medium rock formations. |
| Casting clay bit
(EW) |
Casting clay bit with optimized geometry for very soft to soft caly. |
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
|
