Self Drilling Rock Bolt Soil Nail Roof Anchor Bolt Expansion Shells For Micropile Full Threaded IBO Grouting Bar

1,The adoption of hot rolling automated production line ensures that the elongation of the rod body meets the requirements of iron standard TB/T3356-2014 and TB/T3208-2008.
2, the shape of the rod body is divided into 12.7mm pitch waveform thread, 10mm pitch trapezoidal thread, large pitch (pitch 20mm) trapezoidal thread, the rod body thread can be left or right-handed.
3, the rod material is divided into four kinds of Q345B, Q400, 40cr, 45 # steel, the rod diameter is mainly Φ25 and Φ27mm two kinds.
4. According to different applications, the body can be equipped with its own drill bit, shell anchor head and connecting sleeve to form different hollow grouting anchors.
5,It can be customized according to different construction requirements of mines.

Translated with DeepL.com (free version)

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.

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.

 

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.

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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.

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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.

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