R Thread Self Drilling Anchor System

Self drilling anchor bolt integrates drilling, injection and anchoring, which can improve construction efficiency and reduce composite cost.

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Hollow anchor bar has a full-length thread, which can be cut arbitrarily and lengthened by coupler according to your requirement.

Continuous wave-thread, better bonding effect with cement slurry and better anchoring effect.

Varieties of drill bits can be applied to complex geology in different projects.

How do You Know about Self-drilling Anchor Bars

Thread

The self-drilling anchor bar's thread is designed as a through-body continuous thread, and this design is instrumental in realizing arbitrary cutting connections. This means that these threads run continuously along the entire length of the anchor bar, allowing for flexible and custom connections. The continuous thread design makes it easy for construction professionals to cut the anchor bar to the desired length while maintaining the integrity of the threaded connection. This convenience is a significant advantage in various construction scenarios, where adaptability is key.

One of the key aspects of the thread design is the ability to meet the diverse demands of customers.

R-type threads are designed with reference to the ISO standard. They are primarily suitable for small-diameter self-drilling anchor systems. The reference to this standard ensures that R-type threads adhere to recognized industry norms, providing consistency and reliability for smaller diameter anchor bolts.

T-type threads, on the other hand, are enterprise-standard threads designed with reference to the threads of fine-rolled threaded steel bars. These threads are full of teeth, ensuring a strong adhesion to the slurry. The robust connection formed by T-type threads enhances the overall strength of the anchoring system, making them ideal for more substantial construction applications.

 

Structure

At the core of anchor bar structure is the specially designed chamfer at the bar's end. This chamfer takes the form of a right angle combined with a beveled angle. This design serves multiple essential purposes in the construction process.

First and foremost, the right angle and beveled angle chamfer make the installation of the anchor bar remarkably convenient, especially when used with couplers. This streamlined installation process reduces the time and effort required for construction, contributing to overall project efficiency.

Another crucial advantage of this chamfer design is its positive impact on sealing effectiveness. By incorporating a sealing ring that fits snugly into the beveled angle, the risk of damage to the sealing ring during installation is minimized. This not only improves the sealing effect during construction but also enhances the long-term durability and reliability of the anchor system.

 

Specification

Our independent research and development has a large diameter anchor rolling machine, that can process anchor bar diameter up to 200mm, and anchor bar tensile force from 200kN to kN ranging from the customer construction of specifications and performance needs.
 

Type

In order to meet the customer's demand for products in different scenarios and with different service life, we have different series of self-drilling anchor system products to choose from, both stainless steel products suitable for corrosion-resistant geology and low carbon products with high impact requirements, both conventional products suitable for the mass market and more cost-effective economic products, so that the customers can choose according to their own needs.

Self-drilling anchor can be installed for pre-support, acting as steel structure for load-bearing, or thought it grouting to achieve better geological condition.

Features

Stable quality;

Thread is compatible with ISO and other international standards;

Precision-manufactured anchors with &#; 0.20 mm tolerance;

Good toughness, Agt &#; 10%;

Premium material and special thread rolling process granting good mechanical performance.

Applications

Pre-supporting, micropiling for foundation underpinning, slope anchorage, etc.

Characteristics

No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.

Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bond with the borehole gout.

Fast drilling and installation, drilling, installation and grouting processes are in a single operation.

The hollow core not only serves for flushing during drilling, but also for grouting after drilling.

Continuous threads ensure that the bars can be cut and coupled or extended at any point.

Self-drilling anchor systems for tunnel stabilization

Self-Drilling Anchor systems are used when the bond behavior is critical for the level of safety required on tunneling contraction. Self-drilling Anchors are successfully used for reinforcement ahead of the tunnel face in terms of spiles or spile umbrella support, additional reinforcement, and supplementary anchor works.

The advantages of the Self-drilling system are:

If you are looking for more details, kindly visit R Thread Self Drilling Anchor Bars.

       &#; Variable applications.

       &#; Especially advantageous in rock/soils with low cohesion.

       &#; Simple to install in unstable boreholes.

       &#; No stalling when drilling across clefts.

       &#; Drilling and installation in one cooperation.

       &#; Grouting assured over full depth of the borehole.

       &#; No need to extract drill strings.

The main applications of Self Drilling Anchor Systems in Tunnel Construction

Self-drilling spiles

&#; For stabilization ahead of working face

&#; For safeguarding operations at the working face

Rock bolts

&#; Anchoring system can accommodate rock pressure

&#; Local stabilization of blocks and fault zones

&#; Follow-up rock stabilization

Tunnel face anchors

&#; Stabilization of working face in squeezing rock masses.

&#; Stabilization of working face when using pipe umbrellas

Tunnel floor reinforcement

&#; For strengthening the base of the tunnel arch

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