T52 Hollow Grouting Anchor Bar | Self-Drilling Rock Bolt System

1.Technical Specifications

2. Available Components

2.1 Anchor Bar

The T52 anchor bar is the main reinforcement element. Its hollow design allows grout to be injected through the center of the bar, while the external thread improves bonding and supports connection with matching accessories.

2.2 Nut

2.3 Coupler

2.4 Bearing Plate

Centralizer 

Drill Bit Adapter

3. Applications

Our T52 hollow grouting anchor system is most commonly used in:

• Tunnel support & reinforcement
• Mining roadway support
• Metro and subway projects
• Hydropower construction
• Weak ground support
• Rock mass support and reinforcement
• Foundation support work
• Underground excavation support

4. Installation Process

4.1 Preparation
Determine the required length of T52 anchor rod, thread direction, steel grade and any accessories as required by the project design.

4.2 Work Area Preparation
Clear and level the construction surface area to allow smooth drilling and insertion of anchor.

4.3 Drill hole
Drill into the required depth and direction. Borehole depth and diameter must correspond with anchor length and planned anchoring method.

4.4 Insert the T52 hollow anchor bar into the hole
Once completed, insert T52 hollow anchor bar into hole. T52 anchors can simultaneously drill and advance when used in self-drilling applications.

4.5 Inject grout through anchor bar
Pump grout through hollow centre of anchor into borehole to fill void and further solidify contact between anchor and surrounding ground.

4.6 Cure grout and protect anchor from disturbance.
Allow grout to cure as required by project material specifications and site conditions. Keep anchor away from disturbances until project completion.

5. Surface Protection Options

Available coatings and surface protection options include:
• Hot dip galvanizing per ISO 14 061 standards.
• Epoxy resin coating.
• Bending test performance: ISO 15 19
• Impact test performance: ASTM D27 94.
• Adhesion test perforamnce: ISO 24 09:2007.

6. FAQ

6.1 What does T52 hollow grouting anchor mean?
T52 refers to the diameter of the threaded portion of the steel anchor body. Our T52 hollow grouting anchors have a hollow centre and are used with grout injection.

6.2 Can I use the T52 hollow anchor for self-drilling?
Yes. This anchor can be used in self-drilling applications to minimize construction time in poor ground conditions.

6.3 What industries use the T52 hollow grouting anchor system?
Tunnel support, mining, metro/subway, hydropower, weak ground support and rock support.

6.4 How much can T52/26 anchor hold?
Ultimate Load 929kN, Yield Load: 730kN.

6.5 What accessories are available for T52 anchors?
Nut, Coupler, Bearing plate, centralizer, drill bit adapter.

Need an effective and reliable hollow grouting anchor system for tunnel, mining or underground projects?

Get in touch with our team to learn more about T73 anchor bar sizes, support and get a free quotation today.