R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

Model NO.
R25 R32 R38 R51 T76
Yield Strength
>125kn
Tensile Strength
>180kn
Heat Treatment
Annealed
Tolerance
+0/-0.2mm
Transport Package
Standard Seaworthy Packing
Trademark
GZ steel
Origin
China
HS Code
8431432000
Production Capacity
5000tons/Month
Reference Price
$ 657.00 - 675.00
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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 rod, 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   :
1.No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.
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 pro c ess,   hot-dip galvanized and epoxy coating system.
 

R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

Product Specification

Anchor Bar

R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor
  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.
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.

Anchor Plate
  R25N R32N R32S R38N R51L R51N T76N T76S
Dimention(mm) 150*150 200*200 200*200 200*200 200*200 250*250 250*250 250*250
Thickness(mm) 8 10 12 12 20 40 40 40
Hole diameter(mm) 30 35 35 41 60 60 80 80
Weight(KG/PC) 1.4 3 3.7 3.6 8.8 18.5 18 18
Cold deformed with geometry

Anchor Coupling
  R25N R32N R32S R38N R51L R51N T76N T76S
Outside diameter(mm) 35 42 42 52 63 63 95 95
Length(mm) 120 145 160or190 180 180 200 200 200
Weight 0.45 0.7 0.75 1.4 1.7 1.9 6.4 6.4
Machined steel coupling middle stop
The hollow bar is continuously threaded, it can be cut and coupled anwhere along its length.
The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.

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 uncon   solid   dated 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.
Machined steel bit or Casring steel bit
The sacrificial drill bit is an important part of the self drilling anchoring system.
Choose suitable bits according to different soil type.

Anchor Nut
  R25N R32N R32S R38N R51L R51N T76N T76S
Key size(mm) 41 46 46 50 75 75 100 100
Length(mm) 135 45 45 55 70 70 80 80
Weight(kg/pc) 0.25 0.35 0.35 0.5 1.55 1.55 3.6 3.6
Machined steel nut or casting steel nut
The hexagonal and spherical nuts are made from high precision steel (40Cr,HRC 20-25) to meet the stringent demands on anchor specifications and the daily uses of reinforcement work.
All nuts exceed the ultimate strength of the rod.

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
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 And Factory Display

R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

Product Test

R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

Technology Process
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.

Application:
During the constructions of underground works, it is very common to encounter soft rock, fractured zone and large deformation due to high ground stress. In the case of serious collapsing, extra-long anchor is needed instead of ordinary one.
R38 Mining Anchor Hollow Grouting Anchor Bolt Threaded Rod Screw High Strength and Toughness Anchor

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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PNEUTEC.IT, 2023