R51 Self Drilling Anchor Bolts
R51 Self Drilling Anchor Bolts, diameter is 51mm, the diameter to be chamfered is 55mm, and the chamfer length is 160mm. R51 Self Drilling Anchor Bolts are suitable for underground projects with larger borehole diameters, such as large tunnels, water conservancy projects, etc.
Description
R51 Self Drilling Anchor Bolts, diameter is 51mm, the diameter to be chamfered is 55mm, and the chamfer length is 160mm.
R51 Self Drilling Anchor Bolts are suitable for underground projects with larger borehole diameters, such as large tunnels, water conservancy projects, etc.
Self-drilling anchor bolts are an anchor support device that integrates drilling, grouting, and anchoring functions. They are mainly used in rock reinforcement projects under complex geological conditions such as tunnel advance support, slope treatment, and high ground stress and large deformation. Through integrated design, it solves the technical problems of traditional anchor bolts that are prone to collapse or cannot be constructed with long anchor bolts in weak surrounding rocks and broken strata.
Features of R51 Self Drilling Anchor Bolts:
R51 Self Drilling Anchor Bolts (outer diameter 51mm) are hollow grouting anchor bolts that integrate drilling, grouting, and anchoring, suitable for complex formations such as fractured and loose strata.
1. High load-bearing capacity: R51 Self Drilling Anchor Bolts have a yield load of 450–630 kN and an ultimate tensile strength of 550–800 kN (depending on the model, such as R51L/R51N), significantly higher than steel perforated pipes of the same diameter;
2. Integrated drilling, grouting, and anchoring: The hollow rod body serves as both the drill rod and the grouting pipe, eliminating the need for rod extraction and casing wall protection, enabling simultaneous drilling and grouting, resulting in high construction efficiency (measured drilling speed of approximately 1.42 m/min);
3. Wide applicability to various geological conditions: R51 Self Drilling Anchor… Bolts, equipped with various drill bits (Phillips, ball-tooth alloy/all-steel, etc.), can handle soft soil, gravel, mudstone, weathered rock, and even pebble-bearing strata.
4. Customizable Structure: Common specifications for R51 Self Drilling Anchor Bolts are R51L (11mm wall thickness) and R51N (9mm wall thickness), with ISO1720 standard R-type threads (left-hand/right-hand selectable). Lengths can be spliced as needed.
5. Superior Overall Benefits: Although material costs are approximately 14%–18% higher, the elimination of hole cleaning, pipe installation, and bolt removal processes shortens the construction period by approximately 45%, resulting in lower overall project costs.
6. Full-Length Wavy Thread: R51 Self Drilling Anchor Bolts provide anchoring force and shear resistance, forming a strong connection system with washers and nuts. After grouting, it can improve the surrounding rock and form a load-bearing arch.
7. R51 Self Drilling Anchor Bolts are typically used in challenging drilling scenarios such as tunnel pre-pipe roofing, slope support, foundation pit anchoring, and roadway reinforcement.
Specifications of the Self Drilling Anchor Bar:
|
Size
|
Outer Dia.(mm)
|
Ultimate Lad(kN)
|
Yield Load(kN)
|
Weight(kg/m)
|
|
25
|
200
|
150
|
2.35
|
|
|
32
|
210
|
160
|
2.8
|
|
|
38
|
500
|
400
|
5.45
|
|
|
51
|
800
|
630
|
8.15
|
|
|
T30L
|
30
|
220
|
180
|
2.9
|
|
T40S
|
40
|
660
|
525
|
6.8
|
|
52
|
929
|
730
|
10.2
|
|
|
T73L
|
73
|
1160
|
970
|
13.2
|
|
76
|
1900
|
1500
|
19.7
|
|
|
T103N
|
103
|
2270
|
1800
|
23.5
|
|
T111N
|
111
|
3650
|
2750
|
34.5
|
|
T127L
|
127
|
2400
|
1810
|
30.5
|
|
T130S
|
130
|
7940
|
5250
|
78
|
|
T150S
|
150
|
8400
|
5600
|
108
|
|
T200S
|
200
|
14230
|
9500
|
183
|
PRODUCT DISPLAY
|
SELF DRILLING ANCHOR BAR
|
||||
|
category
|
model
|
Outer diameter (mm)
|
suitable for geological conditions
|
|
|
Cross all-steel drill
|
HSR32/51
|
51
|
Mudstone, gravel soil, chalk soil, lime soil, calcareous clay, artificial fill, soft mudstone
|
|
|
HSR32/76
|
76
|
|||
|
Cross alloy drill
|
HSR32/51
|
51
|
Soft to medium hard rock, e.g. gravel with boulders, fractured rock formations, unreinforced concrete
|
|
|
mud drill
|
HSR32/76
|
76
|
Clay, soft soil, sandy soil, gravel, mixed fill
|
|
|
Ball tooth all-steel drill
|
HSR32/51
|
51
|
Crushed formations, soft sandstone, limestone, gravel, soft rock formations
|
|
|
HSR32/76
|
76
|
|||
|
Ball tooth alloy drill
|
HSR32/51
|
51
|
Soft to medium hard weathered rock formations, boulders, gravel such as mudstone, schist, volcanic rocks, etc.
|
|
APPLICATION
Mainly used in slope engineering, foundation and foundation engineering, tunnels and underground engineering,etc., such as various slope support, foundation pit support, tunnel pipe shed support, basic support of transmissiontowers or wind power towers, old Building repairs and reinforcement of existing structures, etc.
PACKING & DELIVERY
Shipping By Sea
1. Standard packaging
2. Packaging according to customer requirements
FAQ
Q: Can I get samples before order ?
A: Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.
Q: Can I go to your factory to visit?
A: Of course, we welcome customers from all over the world to visit our factory.
Q: What product information do I need to provide?
A: You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q: Does the product have quality inspection before loading?
A: Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept third party inspection.
Q: How do we trust your company?
A: We specialise in steel business for years, headquarter locates in Liaocheng, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO9001 certificate, quality can be guaranteed.
