Hollow anchor rod with external resin

Abstract

The utility model discloses an external resin hollow anchor rod, which comprises a hollow rod body, and a stop-grouting plug, a base plate, a spherical washer and a nut which are sequentially sleeved at the tail end of the hollow rod body, and an anchoring agent plastic pipe filled with a resin anchoring agent is arranged at the front end of the hollow rod body. Compared with the prior art, the anchor rod has the advantages that anchoring agents are arranged outside the rod body, the hollow rod body is directly assembled with the anchoring agent plastic pipe through threads, the product structure is simple, and the utilization rate of the anchoring agents is effectively improved; the inner diameter of the anchoring agent plastic pipe is slightly smaller than the outer diameter of the anchoring agent, interference fit is formed during assembly, the anchoring agent is prevented from falling off in the anchor rod installation process, and mechanical installation can be adapted; the pipe body of the plastic pipe and the tail internal thread are plugged through a solid material, so that the anchoring agent is prevented from flowing back into the rod body; the stirring effect of the anchoring agent can be effectively improved, and the anchoring success rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a resin external type hollow anchor rod, which is suitable for the construction technical field of traffic tunnels, underground spaces, oil storage and the like with hard rock or medium-hard rock layers. BACKGROUND

[0002] In traffic tunnels, underground spaces, oil storage and the like, anchor rods, as an important supporting product, are widely used in rock layer reinforcement and stabilization. Existing anchor rod products are mainly divided into two categories: mechanical anchor rods and resin anchor rods. The mechanical anchor rod is anchored in time by expanding a mechanical anchoring member in an anchor hole, but the mechanical anchoring member has a large size and requires a high degree of completeness of the anchor hole. The resin anchor rod is anchored by bonding a resin anchoring agent with the rock layer, and has a good anchoring effect, but in actual application, the resin anchoring agent is not uniformly stirred and distributed, resulting in unstable anchoring effect. In the prior art, the installation of the resin anchor rod usually needs manual operation, the anchor hole needs to be cleaned before the installation of the anchoring agent, and the installation efficiency is low, and it is difficult to ensure the uniform distribution of the anchoring agent. The anchor rod with the anchoring agent built-in the rod body does not need to clean the anchor hole and separately install the anchoring agent, but in the process of pushing out the anchoring agent, there is a hidden danger that the anchoring agent cannot be completely pushed out due to the blockage of the slurry outlet hole by stone slag or anchoring agent packaging materials. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a resin external type hollow anchor rod.

[0004] The utility model discloses a resin external type hollow anchor rod, which comprises a hollow rod body and a stop plug, a pad plate, a spherical gasket and a nut which are sequentially sleeved at the tail end of the hollow rod body, and an anchoring agent plastic pipe containing a resin anchoring agent is arranged at the front end of the hollow rod body.

[0005] Compared with the prior art, the utility model has the following positive effects:

[0006] 1. In the anchor rod structure of the utility model, the hollow rod body is directly assembled with the anchoring agent plastic pipe through threads, and the product structure is simple. Compared with the built-in resin anchor rod which cannot completely push out the anchoring agent, the utility model places the anchoring agent outside the rod body, thereby effectively improving the utilization rate of the anchoring agent.

[0007] 2. The utility model extrudes and breaks the anchoring agent by crushing the plastic pipe, the tail part of the plastic pipe is provided with internal threads, and cooperates with the rod body. The solid material is used to block the gap between the pipe body and the internal threads of the tail part, thereby preventing the backflow of the anchoring agent into the rod body.

[0008] 3. The inner diameter of the anchoring agent plastic pipe in the utility model is slightly smaller than the outer diameter of the anchoring agent, and an interference fit is formed during assembly, thereby preventing the anchoring agent from falling off during the installation of the anchor rod, and the anchor rod can be adapted to mechanical installation.

[0009] 4. The plastic tube in this invention is a brittle and hard material. While it effectively protects the anchoring agent inside during anchor bolt installation, it will break under certain pressure. The crushed plastic tube fragments help to damage the anchoring agent packaging. The threaded section of the plastic tube has sharp protrusions on its exterior, increasing the contact area between the plastic tube and the anchoring agent. The uneven outer surface increases the flow resistance of the anchoring agent. During the rotation and advancement of the anchor bolt, these protrusions act like a mixer, agitating the anchoring agent. This effectively improves the mixing effect of the anchoring agent and increases the success rate of anchoring. Attached Figure Description

[0010] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0011] Figure 1 This is a schematic diagram of the overall composition of this utility model;

[0012] Figure 2 This is a schematic diagram of the installation process of this utility model;

[0013] Figure 3 This is a schematic diagram of the process of crushing plastic pipes and stirring anchoring agent according to this utility model;

[0014] Figure 4 This is a schematic diagram of the grouting process of this utility model;

[0015] The attached figures include: 1. Resin anchoring agent, 2. Anchoring agent plastic tube, 3. Grout outlet, 4. Grout stop plug, 5. Gasket, 6. Spherical washer, 7. Nut, 8. Hollow rod, 9. Outer sleeve, 10. Inner sleeve. Detailed Implementation

[0016] A resin-insulated hollow anchor bolt, such as Figure 1 As shown, it includes: resin anchoring agent 1, anchoring agent plastic tube 2, grout outlet 3, grout stop plug 4, pad 5, spherical washer 6, nut 7, and hollow rod body 8, wherein:

[0017] The anchoring agent plastic tube 2 is divided into a hollow section and a threaded section. The hollow section is a tubular structure used to contain the resin anchoring agent 1, ensuring the strength of the plastic tube itself to bear the anchoring agent and effectively protecting the anchoring agent from damage due to friction between the inner wall of the anchor hole and the anchoring agent during installation. The threaded section has internal threads and is directly connected to the hollow rod body 8 via threads, making assembly convenient and quick. Sharp protrusions are provided on the outside of the threaded section to fully stir the anchoring agent. The hollow section and the threaded section are sealed with solid material to prevent the anchoring agent from flowing back into the hollow rod body. The inner diameter of the anchoring agent plastic tube 2 is slightly smaller than the outer diameter of the resin anchoring agent 1, forming an interference fit during assembly to prevent the anchoring agent from falling out during anchor installation, and is suitable for mechanized installation.

[0018] The installation of the resin external hollow anchor bolt of this utility model includes the following steps:

[0019] Step 1: Anchor bolt assembly. Follow the instructions... Figure 1 The structure is used to assemble the anchor bolts, and the assembled anchor bolts are placed in the anchor bolt magazine of the anchor bolt trolley; the specific assembly method is as follows:

[0020] The grout stop plug 4, gasket 5, spherical washer 6, and nut 7 are sequentially fitted onto the hollow rod body 8 from the tail end. The threaded section of the anchoring agent plastic tube 2 is then assembled with the front end of the hollow rod body via threads. Finally, the resin anchoring agent 1 is inserted into the hollow section at the front end of the anchoring agent plastic tube 2.

[0021] Step 2: Drilling;

[0022] Step 3: Anchor Bolt Installation. Use the anchor bolt trolley's robotic arm to pick up the anchor bolt, aligning the plastic tube containing the anchoring agent at the front end of the bolt with the anchor hole. Connect the inner sleeve 10 of the trolley to the tail of the hollow bolt body 8, and drive the trolley forward until the resin anchoring agent 1 is pushed to the bottom of the anchor hole. Figure 2 As shown;

[0023] Step 4: Extruding and mixing the anchoring agent. Drive the anchor trolley to rotate counterclockwise, causing the inner sleeve 10 and outer sleeve 9 to follow. The inner sleeve drives the hollow rod body (left-hand thread) to rotate counterclockwise and move forward. During this process, the anchoring agent plastic tube 2 is crushed, and the fragments of the crushed resin anchoring agent 1 are extruded after being cut. After pushing the anchor rod to the bottom of the hole, keep the anchor trolley rotating counterclockwise (inner sleeve and outer sleeve following), and mix the anchoring agent to fill the space between the hollow rod body and the anchor hole. Figure 3 As shown;

[0024] Step 5: Pre-tightening. After the anchoring agent has solidified, drive the inner sleeve 10 to retract and tension the anchor rod. After reaching the designed prestress value, drive the outer sleeve 9 to turn counterclockwise and tighten the nut 7 against the spherical washer 6 to complete the application of anchor rod prestress.

[0025] Step Six: Grouting. The premixed cement mortar is pumped into the hollow rod body 8 through the inner sleeve 10 and flows out from the grout outlet 3 at the front end of the rod body, thus achieving grouting of the anchor rod. Figure 4 As shown.

[0026] The working principle of this utility model:

[0027] 1. The anchor bolt structure in this utility model is simple (e.g. Figure 1 As shown, the plastic tube has an internal thread that directly connects to the hollow rod, simplifying the structure and making the anchoring agent and the hollow rod a whole. This allows for mechanized installation with large machines, improving construction efficiency, reducing manual operation, and lowering construction difficulty and cost.

[0028] 2. The utility model discloses a brand -new plastic pipe structure (such as Figure 2 As shown), size design meets " three path match " theory, and the outer diameter of anchoring agent plastic pipe 2 cooperates anchor hole design, the front end is hollow tubular structure, is used for loading anchoring agent (the inner diameter of anchoring agent plastic pipe 2 is slightly less than the outer diameter of resin anchoring agent 1, and anchoring agent is fixed in plastic pipe through interference fit mode), and the tail part is provided with internal thread connection hollow rod body, and the plastic pipe body and internal thread adopt solid material to block, prevent anchoring agent backflow.

[0029] 3. The plastic pipe material in the utility model is brittle hard material, and the processed plastic pipe can protect anchoring agent from being scratched by the broken stone in anchor hole during the process of putting anchor rod into anchor hole, and the outside of threaded section is designed with sharp convex structure, can fully stir anchoring agent, guarantee anchoring effect, and improve the success rate of anchor rod installation.

[0030] 4. The resin external type hollow anchor rod supporting anchor rod trolley of the utility model can realize the mechanization installation of anchor rod, reduces construction risk, and can effectively promote construction progress.

Claims

1. A resin-external hollow anchor rod, characterized by: The hollow rod body, the stop plug, the backing plate, the spherical washer and the nut are sequentially arranged at the tail end of the hollow rod body, and a plastic pipe filled with resin anchoring agent is arranged at the front end of the hollow rod body.

2. A resin-external hollow anchor rod according to claim 1, characterized in that: The anchoring agent plastic pipe is divided into a hollow section and an internally threaded section.

3. A resin-external hollow anchor rod according to claim 2, characterized in that: The hollow section and the internally threaded section are sealed by solid material.

4. A resin-external hollow anchor rod according to claim 2, characterized in that: A sharp protruding structure is arranged on the outer surface of the internally threaded section.

5. A resin-external hollow anchor rod according to claim 2, characterized in that: The front end of the hollow rod body is assembled with the internally threaded section of the anchoring agent plastic pipe through threads.

6. A resin-external hollow anchor rod according to claim 1, characterized in that: The inner diameter of the anchoring agent plastic pipe is slightly smaller than the outer diameter of the resin anchoring agent, and the resin anchoring agent is fixed through interference fit.

7. A resin-external hollow anchor rod according to claim 1, characterized in that: The anchoring agent plastic pipe is made of brittle and hard material.

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