R25 Self Drilling Anchor Bar
R25 Self Drilling Anchor Bar, diameter is 25mm, the diameter to be chamfered is 28mm, and the chamfer length is 80mm. R25 self-drilling anchor bar is suitable for construction occasions that require large diameter drilling, such as tunnel support, underground warehouses, underground garages, etc.
Description
R25 Self Drilling Anchor Bar, diameter is 25mm, the diameter to be chamfered is 28mm, and the chamfer length is 80mm.
R25 self drilling anchor bar is suitable for construction occasions that require large diameter drilling, such as tunnel support, underground warehouses, underground garages, etc.
Self-drilling anchor bar is a new type of anchoring material. Self-drilling anchor bolts can drill holes by themselves, which greatly reduces the difficulty and labor intensity of installation. Since the self-drilling anchor bar uses a hydraulic arm to drill deep into the soil layer and then tensions the anchor bar, self-stress is generated, which greatly improves the bearing capacity of the anchor bar. The anchoring area of the self-drilling anchor bar is larger than that of ordinary anchor bars, and the bearing capacity is higher.
Features of the R25 Self Drilling Anchor Bar:
The R25 Self Drilling Anchor Bar (25mm outer diameter) is a hollow grouting anchor bar that integrates drilling, grouting, and anchoring. It is primarily used for rapid support in easily collapsible boreholes, loose or fractured strata, and is commonly found in slope, tunnel, foundation pit, and roadway engineering.
1. Functional Integration: The R25 Self Drilling Anchor Bar integrates the drill rod, grouting pipe, and anchor bar into a single unit, eliminating the need for casing. Drilling, grouting, and anchoring are completed simultaneously, resulting in high construction efficiency.
2. Mechanical Properties: The R25 Self Drilling Anchor Bar has a typical yield load of 150 kN and an ultimate load of 200 kN. The bar body is mostly R-type thread or corrugated thread, providing good anchoring force; the wall thickness is approximately 5.5mm, and the weight is approximately 2.3 kg/m.
3. High Adaptability: The R25 Self Drilling Anchor Bar is suitable for difficult-to-drill formations such as soft soil, sand, gravel, and weathered rock, including foundation pits, slopes, tunnel pre-support, and narrow spaces (such as basements and tunnels).
4. Flexible Structure: The hollow rod body can be cut and connected arbitrarily (with connecting sleeves), supporting customized lengths (commonly 1.5–6m), adaptable to different drilling rigs and working conditions; compatible with various drill bits (such as alloy drill bits and auger bits) to suit different soil and rock types.
5. Optimized Grouting: Bottom grout return or side hole grouting design ensures grout fully fills fissures and consolidates surrounding rock, improving anchoring quality and pull-out resistance; optional hot-dip galvanizing and epoxy coating for enhanced durability.
6. Convenient Construction: Drilling and grouting are completed in one step, shortening the construction period and reducing overall costs, especially suitable for projects where machinery is difficult to access or where deadlines are tight.
Applications of R25 Self Drilling Anchor Bar:
1. Slope Protection: R25 Self Drilling Anchor Bar is suitable for steep slopes, rockfall protection, and retaining wall reinforcement, especially in easily collapsible geological conditions such as sand layers and miscellaneous fill, allowing for drilling and grouting without casing.
2. Tunnels and Underground Engineering: R25 Self Drilling Anchor Bar is used for advanced pipe roof support, anchor bolts, and roof system anchoring, particularly in shallow buried sections and weak surrounding rock, forming a load-bearing arch and controlling settlement.
3. Foundation Pit and Ground Reinforcement: Used as an anti-buoyancy anchor or soil restraint component, offering high construction efficiency in confined spaces (such as basements and under bridges).
4. Mine Roadways: Provides immediate anchoring, and when used with hollow grouting to fill fissures, enhances the stability of the surrounding rock.
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.
