R38 Self Drilling Anchor Bolt
R38 Self Drilling Anchor Bolt, diameter is 38mm, the diameter to be chamfered is 40mm, and the chamfer length is 125mm. R38 Self Drilling Anchor Bolt is suitable for underground projects that require high drilling depth and precision, such as highway support, foundation pit support, etc.
Description
R38 Self Drilling Anchor Bolt, diameter is 38mm, the diameter to be chamfered is 40mm, and the chamfer length is 125mm.
R38 Self Drilling Anchor Bolt is suitable for underground projects that require high drilling depth and precision, such as highway support, foundation pit support, etc. In various underground projects, there are complex geological conditions such as weak surrounding rock, fault fracture zone, high ground stress and large deformation, which bring great difficulties to rock anchor construction, especially in the case of serious collapse and the need for extra-long anchor rods, the general anchor rods are powerless.
Self-drilling anchor rods integrate the functions of drilling, grouting and anchoring, and can improve the surrounding rock well in tunnel advance support and various slope treatment, high ground stress and large deformation and other disease treatment projects to achieve ideal support effect.
Features and Applications of the R38 Self Drilling Anchor Bolt:
The R38 Self Drilling Anchor Bolt is a hollow grouting anchor bolt that integrates drilling, grouting, and anchoring, specifically designed for fractured and easily collapsed formations.
1. Integrated Functions: The R38 Self Drilling Anchor Bolt combines the functions of a drill rod, grouting pipe, and anchor bolt, enabling simultaneous drilling and grouting without the need for casing, thus preventing borehole collapse and improving drilling efficiency.
2. Strong Mechanical Properties: The R38 Self Drilling Anchor Bolt has a typical yield load of 400–450 kN, an ultimate tensile load of 500–550 kN, and a tensile strength of 500–550 kN (depending on specific models such as HER38N/S), making it suitable for high-load-bearing applications.
3. Adaptable to Complex Geological Conditions: The R38 Self Drilling Anchor Bolt, equipped with cross-head and ball-tooth alloy drill bits, is suitable for drilling in difficult environments such as soft soil, sand, gravel, weathered rock, and fill containing construction waste.
4. Highly Efficient and Convenient Construction: The R38 Self Drilling Anchor Bolt can be cut and connected (via connecting sleeves), supporting operations in confined spaces (such as foundation pits, tunnels, and under bridges), eliminating multiple steps of “drilling – casing installation – drill removal – anchor bolt installation – grouting,” shortening the construction period by 30%–50%.
5. Full-Length Corrugated Thread: Enhances anchoring and gripping force. After grouting, the grout can diffuse along the thread grooves, improving the surrounding soil and rock, achieving full-length bonded anchoring.
6. Standard Specifications: R38 Self Drilling Anchor Bolt, outer diameter 38 mm, wall thickness approximately 8–10.5 mm (corresponding to inner diameter 17–22 mm), weight approximately 5.2–6.3 kg/m, material mostly 40Cr or equivalent alloy steel, threaded left/right (R type), corrosion protection options include hot-dip galvanizing or epoxy coating.
7. R38 Self Drilling Anchor Bolt is widely used in slope protection, tunnel pre- and radial support, foundation pit reinforcement, mine roadways, and existing building foundation repair, especially in strata with abundant groundwater, loose and fractured soil, or high-stress disturbance.
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.
