R22 Self Drilling Anchor Bolt
R22 Self Drilling Anchor Bolt, diameter is 22mm, the diameter to be chamfered is 25mm, and the chamfer length is 70mm. R22 Self Drilling Anchor Bolt is suitable for different construction occasions, including rock geology, underground construction, coal mining, etc.
Description
R22 Self Drilling Anchor Bolt, diameter is 22mm, the diameter to be chamfered is 25mm, and the chamfer length is 70mm.
R22 Self Drilling Anchor Bolt is suitable for different construction occasions, including rock geology, underground construction, coal mining, etc.
Chamfering is an indispensable part of self-drilling anchor bolts, which can improve construction efficiency and project quality, and also help reduce the occurrence of accidents. It should be noted that different types of self-drilling anchor bolts require different chamfer lengths and diameters, and a comprehensive analysis of the construction site is required before selection.
Features of the R22 Self Drilling Anchor Bolt:
The R22 Self Drilling Anchor Bolt (nominal diameter approximately 22mm) is a hollow, fully threaded anchor bolt that integrates drilling, grouting, and anchoring functions. It is suitable for complex formations such as fractured and easily collapsed boreholes.
1. Integrated Structure: The R22 Self Drilling Anchor Bolt consists of a hollow rod body (with international standard threads), a self-drilling bit, a washer plate, a nut, and a connecting sleeve. It eliminates the need for casing, achieving simultaneous drilling, grouting, and anchoring.
2. Applicable Geological Conditions: The R22 Self Drilling Anchor Bolt is specifically designed for weak, loose, fractured, or easily collapsed formations (such as mixed fill, weathered rock, and sand layers). Grouting is performed simultaneously during drilling, effectively consolidating the borehole wall.
3. High Efficiency: The R22 Self Drilling Anchor Bolt integrates the drill rod and anchor bolt into one unit, eliminating the need for casing installation, drill rod extraction, and anchor bolt insertion. This makes it suitable for confined spaces or rapid support projects (such as slopes, foundation pits, and tunnel pre-support pipe roofs).
4. Grouting Method: The hollow rod body serves as both a grouting channel and a venting channel, supporting pure pressure or reverse circulation grouting to ensure full grout coverage and tight anchoring.
5. Limitations: Due to its relatively small diameter, it is not suitable for highly prestressed or large-deformation surrounding rock. It is primarily used for temporary support, soil nailing, or lightweight 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.
