Hollow grouting anchor bolt

Hollow anchor is a common geotechnical engineering support material. The following is a detailed introduction about it:

Structural features

Hollow design: The anchor body is a hollow steel pipe or other metal material. The hollow part in the center can be used for grouting, so that the slurry can be injected into the surrounding rock and soil through the anchor to enhance the bonding force between the anchor and the rock and soil.

Improve support effect.

With threaded or other connection device：Both ends of the rod body are usually threaded so that they can be used in conjunction with connecting parts such as pads and nuts. They can be easily installed and prestressed to apply active support force to the rock and soil.

How it works

Suspension: The unstable rock and soil is suspended on the deep stable rock and soil through anchor rods to prevent it from collapsing or sliding.

Composite beam action: In layered rock and soil, anchor rods can combine several thin rock layers into a thicker composite beam, thereby improving the bending resistance of the rock layer and increasing the stability of the rock and soil.

Reinforcement: After grouting, the slurry fills the pores and cracks in the rock and soil mass, improving the strength and integrity of the rock and soil mass. At the same time, the anchor rod and the grouting body form a whole and jointly bear the pressure of the rock and soil mass.

advantage

Easy construction: The hollow anchor is relatively light, easy to carry and install, and can be used in a small space. At the same time, its grouting process is simple, and grouting can be directly injected through the hollow part of the anchor without the need for additional grouting pipes.

Good support effect：Can quickly provide support force, effectively control the deformation of rock and soil, and prevent collapse. After grouting, it can be closely combined with the rock and soil to form a composite support structure, improving the overall stability of the support system.

Highly adaptable：The length, diameter, spacing and grouting parameters of the anchor rod can be adjusted according to different geological conditions and engineering requirements. It is suitable for various geotechnical engineering projects such as tunnels, slopes, foundation pits, etc.

Application Areas

Tunnel Engineering。

Slope Engineering。

Foundation pit engineering。

Construction technology

drilling。

Chiang Khong。

Insert anchor。

Grouting。

Mounting plate and nuts。

Quality control points

Raw material quality。

Drilling quality。

Anchor installation quality。

Grouting quality。

Development Trend

High strength and durability。

Intelligent monitoring。

Green and Environmentally Friendly。

Hollow anchors can be divided into the following categories according to different classification standards:

Classification by material

Ordinary steel hollow anchor。

Stainless steel hollow anchor。

Fiber reinforced plastics (FRP) hollow anchor。

Classification by rod shape

Equal diameter hollow anchor。

Variable diameter hollow anchor。

Classification by connection method

Threaded hollow anchor。

Welding connection hollow anchor。

Classification by grouting method

Atmospheric pressure grouting hollow anchor。

High pressure grouting hollow anchor。

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