what is Self-drilling Hollow anchor bar?
In tunneling and underground projects, self-drilling hollow rock bolts play a crucial role in initial support and stabilization. These rock bolts provide high-pressure grouting to fortify soil or rock masses, ensuring surface stability and structural integrity within tunnels.
Technical features
Hollow anchor, the anchor body adopts hollow design, the hole in the body serves as a channel for drilling high-pressure wind and water and grouting channel, compared with the solid body, the hollow body design can obtain better stiffness and shear strength. The outer surface of the anchor body is full-length standard large-pitch threaded structure, the threaded structure is convenient for cutting and lengthening of the anchor, and compared with the smooth body, it increases the bonding area between the anchor body and the grouting material and thus improves the anchoring force.
Hollow anchor rod rod tensile strength reached more than 300MPa; torque greater than 40N-m, its strong tensile, light weight; and can be cut, not easy to damage the cutter, the surface of the anti-static, flame retardant, cutting does not produce sparks, corrosion resistance, heat insulation insulation, long-lasting durability. The following engineering experts from the anchor business of Zhongfu Mining Support Factory will summarize some of the advantages of hollow anchors in the anchoring environment for you
Types of Threads
Hollow anchor bars come in two primary thread types: R thread and T thread. The R thread conforms to the ISO10208 standard, offering reliable performance in standard applications. However, the T thread, with its deeper teeth, provides even greater support force and is particularly advantageous in applications where high frictional resistance is required. The adhesive friction force of T thread bars is typically double that of R thread bars of the same diameter, making them the preferred choice for self-drilling anchor bolts, especially in micropile applications.
Installation Speed and Efficiency
When speed and efficiency are paramount, hollow anchor bars offer a distinct advantage. The self-drilling capability of these bars eliminates the need for separate drilling and grouting stages, significantly reducing installation time. In contrast, the grouting process associated with threaded bars can be more time-consuming, although it provides a high level of stability.
Products Application
Applications of Self-Drilling Hollow Rock Bolts
Radial reinforcement
Hollow anchors replace traditional mortar anchors for radial reinforcement, which can completely solve many defects such as incomplete grouting and inability to achieve pressure grouting during the construction process of traditional mortar anchors, ensuring the quality of the project.
Slope reinforcement
Using hollow anchors to reinforce unstable slopes not only has a simple process and low cost, but also is convenient and quick to construct and has remarkable effects.
Foundation pit support
Hollow anchors are used to reinforce foundation pits of buildings, which not only has a simple process, but also can realize pressure grouting and improve the surrounding rock conditions of foundation pits.
Specification
|
Product name |
Self-drilling hollow anchor bar |
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Place of Origin |
China |
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Hebei |
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Brand Name |
Brand Name |
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Material |
Q235 |
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Type |
Anchor rock bar |
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Color |
Silver, Black |
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Length |
Customers' Requirement |
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Certification |
ISO |
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Payment Term |
30%TT Advance + 70% Balance |
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Delivery Time |
7-14 days |
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Function |
Underground Mining Tunnel Arch Reinforcement |
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Feature |
Easily install |
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Application |
In tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement |
Packing and delivery
We are always at your service when you need
Although at this stage, mining hollow anchors still have some big or small shortcomings, such as high cost, the rod body materials still need some improvement, anchor embossing and other production processes need to be improved, etc., but on the whole the flaws do not cover up the faults, hollow anchors for the support of the environment to bring a kind of high efficiency and convenient trend, especially with the use of resin anchors, the effect is the icing on the cake.
Because of the high process requirements, the choice of hollow anchor manufacturers is also a difficult problem. Be sure to look at the qualifications of the manufacturer, such as Handan Zhongfu Industrial and Mining Support, is a deep plowing in the field of support for 14 years of veteran manufacturers, with a team of experienced research and development of hollow anchor, in many areas of the country have harvested praise and praise. If you have the need in this area, you may want to contact this manufacturer in the rich.
active members
years experience
events & challenges
expert instructors
application scenarios
Self Drilling Anchor Bolt is mainly used in slope stabilization, tunneling pre-support, foundations with micropiles, it is also widely used in the railway system, metro project etc.
Do you have a specific context in mind where you're considering their use? Then call me now?
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