Experimental device for manufacturing variable thread anchor hole

Abstract

The utility model discloses an experimental device for manufacturing a variable threaded anchor hole, which comprises a variable threaded pipe and a rope, and a hollow pipe is arranged in the variable threaded pipe; a notch is formed in the outer portion of the variable threaded pipe, the notch is formed by a plurality of annular grooves or oval rings in parallel, and two through holes are formed in the notch and the variable threaded pipe so that the notch can be communicated with the interior of the variable threaded pipe. And the rope is wound outside the variable threaded pipe or / and penetrates through the through hole. The beneficial effects of the utility model are that the thread spacing can be adjusted according to the rope winding spacing, and the digging shapes of anchor holes with different thread spacings can be simulated according to different thread spacings, so that different test results can be obtained; the device is used for testing anchor holes with different thread pitches and different anchoring forces under the same action conditions of an anchor rod, an anchoring agent and the like, so that guidance is provided for digging of the anchor holes in actual engineering.

Description

Technical Field

[0001] The utility model relates to a deep well anchor rod, in particular to a manufacturing device for testing the bite force of an anchor rod and an anchor hole. Background Art

[0002] The deep formation is now mainly supported by active anchor bolts, and the anchoring effect of the anchor bolt anchoring section directly affects the stability of the support structure. With the gradual deepening of mining, the anchor failure rate of the thousand-meter deep well increases, and the stress deformation of the anchor bolt is complex, especially the stress damage deformation of the anchoring interface of the anchor body is complex. Studies have shown that the bonding force of the anchoring interface is mainly composed of the bonding force of the interface, the mechanical bite force of the interface, and the interface friction force. Among them, the interface bonding force is related to the two bonding materials of the interface. Because the bonding materials of the anchoring interface are basically fixed, the bonding force on the interface is basically the same. In addition, the friction force on the interface mainly generates friction when the two materials on the interface have relative slip. By analyzing that the bite force of the two materials on the interface is the main component of the interface bonding force, based on the above analysis, the anchor bolt anchoring effect of the surrounding rock in the actual deep formation is optimized. Therefore, the variable thread anchor hole is tested to determine whether the anchor holes with different thread spacings will have different anchoring forces under the same conditions of anchor bolts and anchoring agents, so as to provide guidance for the excavation of anchor holes in actual engineering.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to solve the problem that there is no test on the anchoring effect of the anchor rod in the surrounding rock in the deep stratum, and it is impossible to provide support for the excavation design of the anchor hole in the actual project.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] An experimental device for making a variable thread anchor hole includes a variable thread tube and a rope. The variable thread tube is a hollow tube. A notch is provided on the outside of the variable thread tube. The notch is formed by a plurality of annular grooves or elliptical rings arranged in parallel. The notch and the variable thread tube have two through holes to achieve communication between the notch and the inside. The rope is wound around the outside of the variable thread tube and / or passes through the through hole.

[0007] In the utility model, lubricating coating is applied on the surface of the rope, and the rope is wound around a variable threaded tube to form an appearance similar to a threaded shape. The rope is immersed in the coating to increase the lubrication force for subsequent extraction, and the rope is placed as a whole in the place where a threaded anchor hole is needed in the experiment, and then the surrounding rock is filled and waited for the surrounding rock to solidify; after solidification, the rope can be pulled out first, and then the entire variable threaded tube can be pulled out to form a threaded anchor hole in the shape of a thread, and then the anchor rod is placed and filled with anchoring agent for subsequent experiments. According to the spacing of the rope winding, the spacing of the thread can be adjusted, and the shapes of the anchor holes with different thread spacings can be simulated according to different thread spacings, so as to obtain different test results, in order to judge the anchor holes with different thread spacings and different anchoring forces under the same anchor rod and anchoring agent, so as to provide guidance for the excavation of anchor holes in actual engineering.

[0008] Preferably, the rope is a nylon rope.

[0009] Preferably, the rope is wound along the outside of the variable thread tube along adjacent notches or with at least one notch spaced therebetween.

[0010] Preferably, the rope is wound around the outside of the variable thread tube in a manner of passing through the through hole along half of adjacent notches or at least half of an interval of at least one notch.

[0011] The full thread form or half thread form can be set as needed to increase the test samples.

[0012] Preferably, one end of the variable threaded tube is a blind end.

[0013] The blind end prevents gravel and soil from falling into the anchor hole and entering the variable threaded pipe, and also compacts the bottom of the anchor hole to reduce falling.

[0014] Preferably, the other end of the variable threaded tube is connected to an extension tube, and the extension tube is a round tube.

[0015] Preferably, the other end of the extension tube is connected to the clampable end.

[0016] The clamping end may be a structure that is convenient for external clamping, such as a pipe section with internal threads, a block structure with a clamping surface, etc., but is not limited thereto. It can be set according to actual conditions, with convenient clamping as the basic requirement.

[0017] Preferably, the depth of the notch is smaller than the diameter of the rope.

[0018] To ensure that the thread can be formed, the rope can protrude relative to the surface of the variable thread tube after being placed in the notch.

[0019] Preferably, the variable threaded tube is a straight tube.

[0020] Preferably, the spacings between the notches are the same or different.

[0021] The advantages of the utility model are:

[0022] 1. In the utility model, lubricating coating is applied to the surface of the rope, and the rope is wound around a variable threaded tube to form an appearance similar to a thread. The rope is immersed in the coating to increase the lubrication force for subsequent extraction. The rope is placed as a whole in the place where a threaded anchor hole is needed in the experiment, and then the surrounding rock is filled and waits for the surrounding rock to solidify. After solidification, the rope can be pulled out first, and then the entire variable threaded tube can be pulled out to form a threaded anchor hole in the shape of a thread. Anchor rods are then placed and filled with anchoring agents for subsequent experiments. The thread spacing can be adjusted according to the spacing of the rope windings, and the shapes of anchor holes with different thread spacings can be simulated according to different thread spacings, thereby obtaining different test results. This is to determine anchor holes with different thread spacings and different anchoring forces under the same anchor rod and anchoring agent conditions, thereby providing guidance for the excavation of anchor holes in actual projects.

[0023] 2. You can set the full thread form or half thread form as needed to increase the test samples;

[0024] 3. The blind end prevents the falling of gravel and soil in the anchor hole into the variable threaded pipe, and also compacts the bottom of the anchor hole to reduce falling;

[0025] 4. The clamping end can be a structure that is convenient for external clamping, such as a pipe section with internal threads, a block structure with a clamping surface, etc., but it is not limited to this. It can be set according to actual conditions, with convenient clamping as the basic requirement;

[0026] 5. To ensure that the thread can be formed, the rope can protrude relative to the surface of the variable thread tube after being placed in the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an experimental device for making a variable thread anchor hole according to an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of an experimental device (hidden rope) for making a variable thread anchor hole according to an embodiment of the utility model;

[0029] Figure 3 This is a front view of an experimental device (with hidden rope) for making a variable thread anchor hole according to an embodiment of the utility model;

[0030] Figure 4 yes Figure 3 Sectional view at AA;

[0031] Figure 5 yes Figure 3 Sectional view at the middle BB;

[0032] Figure 6This is a schematic diagram of the rope winding along adjacent notches in the first embodiment of the utility model;

[0033] Figure 7 It is a schematic diagram of the rope in the first embodiment of the present utility model being wound in a manner with one notch spaced apart;

[0034] Figure 8 It is a front view of the rope winding along adjacent notches and through holes in the second embodiment of the utility model;

[0035] Fig. 9 It is a rear view of the rope wound along adjacent notches and through holes in the second embodiment of the utility model;

[0036] Fig.10 It is a test schematic diagram of the experimental device of the variable thread anchor hole of the embodiment of the utility model after the thread anchor hole is formed;

[0037] Numbers in the figure:

[0038] 1. variable threaded tube; 11. notch; 12. through hole;

[0039] 2. Rope; 3. Plate; 4. Extension tube; 5. Clampable end; 6. Anchoring agent; 7. Anchor rod; 8. Threaded anchor hole; 9. Surrounding rock. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] Embodiment 1:

[0042] like Figure 1-Figure 4 As shown, an experimental device for making a variable threaded anchor hole includes a variable threaded tube 1 and a rope 2, wherein the variable threaded tube 1 is a hollow tube; a notch 11 is provided on the outside of the variable threaded tube 1, wherein the notch 11 is formed by a plurality of annular grooves or elliptical rings arranged in parallel, and the notch 11 and the variable threaded tube 1 have two through holes 12 to achieve communication between the notch 11 and the interior; the rope 2 is wound around the outside of the variable threaded tube 1 and / or passes through the through hole 12.

[0043] Specifically, in this embodiment, the variable threaded pipe 1 is made of a PVC pipe, and the PVC pipe is evenly grooved as required to obtain an integral pipe fitting with a notch 11, which is not easy to deform.

[0044] It should be noted that the notch 11 is an annular groove. Figure 3 The horizontal groove 11 shown in FIG. 1 is as shown in FIG. Figure 3 The groove shown is tilted to form an elliptical groove.

[0045] In this embodiment, the slots 11 can be made with the same or different spacings in the vertical direction as required, so as to form a thread anchor hole 8 with a constant pitch or a variable pitch.

[0046] The variable threaded tube 1 is a straight tube, and the bottom end of the variable threaded tube 1 is a blind end. Specifically, the bottom end of the variable threaded tube 1 can be closed by filling or bonding a plate 3. The blind end prevents gravel and soil from falling into the anchor hole and entering the variable threaded tube 1, and also compacts the bottom end of the anchor hole to reduce falling.

[0047] The top of the variable threaded tube 1 is connected to the extension tube 4, which is a round tube. The top of the extension tube 4 is connected to the clampable end 5. The extension tube 4 is used to extend the variable threaded tube 1 for easy clamping, and the clampable end 5 is a structure that is easy to clamp externally. Figure 4 The pipe section with internal threads shown may be a block structure with a clamping surface, etc., but is not limited thereto, as long as it is set according to actual conditions, with convenient clamping as the basic requirement. The end is extended by an extension tube 4 and a clampable end 5 is placed to quickly and effectively remove the mold.

[0048] In this embodiment, the rope 2 is a nylon rope.

[0049] There are many ways to wind the rope 2, such as Figure 6 As shown, the rope 2 is wound along the outside of the variable thread tube 1 along the adjacent notches 11; it can also be as Figure 7 As shown, the rope 2 is wound along the outside of the variable thread tube 1 in a manner of being spaced apart by a notch 11 .

[0050] like Fig.10 As shown, in the use process of this embodiment, the variable threaded tube 1 and the rope 2 are coated with lubricating paint on the surface. By coating the lubricating paint on the whole and on the variable threaded tube 1 and the rope 2, it is easy to pull out later. By winding the rope 2 on the variable threaded tube 1, a thread-like appearance shape is formed. The rope 2 is immersed in the paint to increase the lubrication force for subsequent extraction. The whole is placed in the place where the threaded anchor hole 8 needs to be prepared in the experiment (before the threaded anchor hole 8 is prepared, a straight hole can be drilled by a drilling rig) and then filled with surrounding rock 9, waiting for the surrounding rock 9 to solidify; after solidification, the rope 2 can be pulled out first, and then the clampable end 5 can be clamped externally to pull out the variable threaded tube 1 as a whole, so that the threaded anchor hole 8 with a thread shape can be formed, and then the anchor rod 7 is placed and filled with anchoring agent 6 for subsequent experiments.

[0051] In this embodiment, the pitch of the threads can be adjusted according to the pitch of the rope 2 wound, and the shapes of the anchor holes with different thread pitches can be simulated according to the different thread pitches, so as to obtain different test results. In order to judge the anchor holes with different thread pitches and different anchoring forces under the same conditions of anchor rod 7 and anchoring agent 6, guidance is provided for the excavation of anchor holes in actual projects.

[0052] Embodiment 2:

[0053] like Figure 8 , Fig. 9 As shown, the winding method of the rope 2 in this embodiment is different from that in the first embodiment;

[0054] In this embodiment, the rope 2 is wound around the outside of the variable threaded tube 1 by winding along half of the adjacent notches 11 and passing through the through hole 12. Figure 8 The figure shows the shape of the rope 2 exposed outside the variable threaded tube 1 when passing through the through hole 12. Fig. 9 The figure shows the back side, where only one point of the rope 2 at the through hole 12 can be seen.

[0055] Therefore, the above embodiment can be set to a full thread form or a half thread form as needed to increase the test samples.

[0056] Preferably, the depth of the notch 11 is smaller than the diameter of the rope 2. To ensure that the thread can be formed, the rope 2 can protrude relative to the surface of the variable thread tube 1 after being placed in the notch 11.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An experimental device for making variable thread anchor holes, characterized in that: It includes a variable threaded tube and a rope, wherein the variable threaded tube is a hollow tube; a notch is provided on the outside of the variable threaded tube, wherein the notch is formed by a plurality of annular grooves or elliptical rings arranged in parallel, and the notch and the variable threaded tube have two through holes to achieve communication between the notch and the inside; the rope is wound around the outside of the variable threaded tube and / or passes through the through hole.

2. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: The rope is a nylon rope.

3. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: The rope is wound along the outside of the variable thread tube along adjacent notches or with at least one notch spaced therebetween.

4. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: The rope is wound around the outside of the variable thread tube in a manner of passing through the through hole along half of the adjacent notches or at least half of the notches.

5. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: One end of the variable threaded tube is a blind end.

6. The experimental device for making variable thread anchor holes according to claim 5 is characterized in that: The other end of the variable threaded tube is connected to an extension tube, and the extension tube is a round tube.

7. The experimental device for making variable thread anchor holes according to claim 6 is characterized in that: The other end of the extension tube is connected to the clampable end.

8. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: The depth of the notch is smaller than the diameter of the rope.

9. The experimental device for making variable thread anchor holes according to claim 1 is characterized in that: The variable threaded pipe is a straight pipe.

10. The experimental device for making variable thread anchor holes according to claim 1, characterized in that: The spacings between the notches are the same or different.

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