Hollow anchoring drawing method for pipe seam type anchor rod

Abstract

The invention discloses a hollow anchoring and drawing method for a pipe seam type anchor rod. The hollow anchoring and drawing method comprises the following steps that S1, the anchor rod is installed; s2, anchoring with an anchor rod; s3, connecting a drawing instrument; the exposed section of the anchor rod is connected with the drawing instrument through a connecting nut, and then the mounting state of a connecting assembly is adjusted so that the connecting assembly can make contact with the rock wall to support the drawing instrument; s4, drawing the anchor rod; and drawing the anchor rod by using a drawing instrument, and recording the maximum drawing force of the anchor rod when the anchor rod is pulled off or broken. An anchoring agent is injected in the process that the anchor rod is rotationally installed, the anchoring agent can be fully stirred so that anchoring stress of the anchor rod can be uniform, on the basis, the connecting assembly is installed to be connected with the drawing instrument, and the connecting assembly stably supports the drawing instrument to conduct drawing work on the anchor rod; and the pipe seam type anchor rod installed through the method can be drawn at will, restricting factors are few, and using is easier and more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel anchor support, and in particular relates to a method for pulling out a hollow anchor of a pipe seam type anchor. Background Art

[0002] The pipe-slit anchor construction has the characteristics of fast and simple installation. It is widely used in non-coal mines and is an important anchor support technology. Its principle is to use an anchor drill to drive the pipe-slit anchor into a borehole smaller than the outer diameter of the pipe-slit anchor, and use the elasticity of the pipe-slit anchor steel pipe to generate radial pressure on the hole wall, so that friction resistance is generated between the pipe-slit anchor and the hole wall, and the compressive stress of the anchor support plate puts the tunnel surrounding rock under a three-dimensional stress state, thereby achieving the effect of reinforcing and controlling the stability of the surrounding rock.

[0003] After the pipe seam anchor is installed, it is necessary to regularly check the pull-out force of the pipe seam anchor, and the pull-out force can be used to feedback the construction quality and anchoring effect of the pipe seam anchor. At present, there are two main methods for the pull-out force test of the pipe seam anchor: welding and pre-installation of pull-out structural parts. The welding method requires hot work, and the pre-installation of pull-out structural parts can only be used for the specified pipe seam anchor in advance. Both methods have complicated procedures, are subject to many constraints, and are very inconvenient to operate. Summary of the invention

[0004] The present invention aims to solve the problem that the pulling operation of the hollow anchor of the anchor rod in the prior art is complicated and inconvenient, and proposes the following technical solution:

[0005] A hollow anchoring and pulling method of a pipe seam anchor rod comprises the following steps:

[0006] S1. Anchor installation;

[0007] After drilling the installation hole with a drill, install the end of the anchor rod into the installation hole and inject anchoring agent into the installation hole;

[0008] S2, anchor bolting;

[0009] Use the torque nut to connect the exposed section of the anchor rod to the stirrer. The drill rig cooperates with the stirrer to rotate the anchor rod to stir the anchoring agent and push the anchor rod to the bottom of the installation hole. After the anchoring agent solidifies, remove the stirrer.

[0010] S3, connect the pulling instrument;

[0011] Use the connecting nut to connect the exposed section of the anchor rod to the puller, and then adjust the installation state of the connecting assembly so that it contacts the rock wall to support the puller;

[0012] S4, anchor rod pulling;

[0013] Use a puller to pull the anchor rod. When the anchor rod is pulled off or broken, record the maximum pull-out force of the anchor rod.

[0014] As a preferred embodiment of the above technical solution, the connection assembly includes a mounting seat and a plurality of connection frames, one end of the connection frame is rotatably inserted in the mounting seat, the other end of the connection frame is rotatably inserted with a screw rod, one end of the screw rod is provided with an adjustment block, and the other end of the screw rod is provided with an abutment member;

[0015] After the puller is connected to the anchor rod, multiple connecting frames are pushed to deflect and make them parallel to the anchor rod, and the adjusting block is used to rotate the screw rod so that its end abutment contacts the rock wall. The puller is supported by the connecting assembly to stably set it on the rock wall.

[0016] As a preferred embodiment of the above technical solution, the connecting assembly also includes a fixing part, which includes a fixing block movably inserted into the connecting frame, a return spring is fixedly connected between the fixing block and the connecting frame, a pushing block is provided on one side of the fixing block, and the pushing block is fixedly connected to the screw rod.

[0017] As a preferred embodiment of the above technical solution, the bottom of the pushing block is conical, and the end of the fixed block matches the pushing block.

[0018] As a preferred embodiment of the above technical solution, the abutment member includes a mounting block and a rotating block rotatably inserted in the mounting block, the mounting block is rotatably sleeved on the surface of the screw rod, and the abutment block is rotatably inserted inside the rotating block.

[0019] As a preferred embodiment of the above technical solution, a blocking block is provided on one side of the abutment block, and a screw rod which is threadably connected to the mounting block is rotatably inserted on one side of the blocking block.

[0020] As a preferred embodiment of the above technical solution, a limiting rod is arranged on the top of the mounting block, and one end of the limiting rod is movably inserted in the connecting frame.

[0021] As a preferred embodiment of the above technical solution, the connecting assembly includes a connecting tube, one end of which is provided with a supporting plate that fits against the rock wall, and the other end of the connecting tube is fixedly connected to the pulling instrument.

[0022] The beneficial effects of the present invention are:

[0023] 1. In the process of rotating and installing the anchor rod, the anchoring agent is injected, and the anchoring agent can be fully stirred to make the anchor rod anchoring force uniform. On this basis, the connecting component is installed to connect it with the pulling instrument. The connecting component stably supports the pulling instrument to pull the anchor rod, and the pipe seam anchor rod installed by this method can be pulled arbitrarily, with fewer restrictive factors and simpler and more convenient to use;

[0024] 2. The connection assembly can adjust the position of the abutment at the end of the screw rod so that it can contact the uneven rock wall at different lengths, thereby stably supporting the puller and preventing the puller from moving suddenly during the test, which may cause damage to the equipment or injury to personnel. It can also reduce errors caused by equipment instability, making the test results more accurate.

[0025] 3. The abutment member can adjust the fitting surface to maintain the maximum contact area with the rock wall surface, so as to adapt to the use of rock walls in more complex environments. There is no need to level the rock wall, and the pulling of the anchor rod is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The diagram shows the anchoring state of the anchor rod in Example 1;

[0027] Figure 2 The figure shows the pulling state of the anchor rod in Example 1;

[0028] Figure 3 Shown is a front view of the connection assembly in Example 2;

[0029] Figure 4 The figure shows the non-working state of the connection component in Example 2;

[0030] Figure 5 Shown is a front cross-sectional view of the connection assembly in Example 2;

[0031] Figure 6 What is shown is a schematic diagram of the structures of the various parts of the connection assembly in Example 2.

[0032] In the figure: 11, anchor rod; 12, anchoring agent; 13, torque nut; 14, agitator; 15, connecting nut; 16, pulling instrument; 20, connecting assembly; 21, mounting seat; 22, connecting frame; 23, screw rod; 24, adjusting block; 25, abutment; 251, mounting block; 252, rotating block; 253, abutment block; 254, blocking block; 255, screw rod; 256, limiting rod; 26, fixing member; 261, fixing block; 262, return spring; 263, pushing block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0034] Example 1

[0035] Figure 1-Figure 2 A hollow anchoring and pulling method of a pipe seam anchor rod 11 comprises the following steps:

[0036] S1, installation of anchor rod 11;

[0037] After drilling the installation hole using a drilling machine, the end of the anchor rod 11 is installed into the installation hole and the anchoring agent 12 is injected into the installation hole;

[0038] S2, anchor rod 11 anchoring;

[0039] Use the torque nut 13 to connect the exposed section of the anchor rod 11 to the stirrer 14. The drilling rig cooperates with the stirrer 14 to rotate the anchor rod 11 to stir the anchoring agent 12 and push the anchor rod 11 to the bottom of the installation hole. After the anchoring agent 12 solidifies, remove the stirrer 14.

[0040] S3, connecting the pulling instrument 16;

[0041] Use the connecting nut 15 to connect the exposed section of the anchor rod 11 to the puller 16, and then adjust the installation state of the connecting assembly 20 so that it contacts the rock wall to support the puller 16;

[0042] S4, pulling of anchor rod 11;

[0043] The anchor rod 11 is pulled out using a puller 16. When the anchor rod 11 is pulled out or broken, the maximum pull-out force of the anchor rod 11 is recorded.

[0044] Figure 2 In the figure, the connecting assembly 20 includes a connecting tube, one end of which is provided with a supporting plate that fits against the rock wall, and the other end of the connecting tube is fixedly connected to the pulling device 16.

[0045] The pulling device 16 is composed of an oil cylinder, a connecting rod, a manual pump, a mounting gasket and a nut.

[0046] After the anchor rod 11 is installed, a support plate is rotated into its tail, and the support plate fits with the flat rock wall surface. When the puller 16 is installed, the exposed section of the anchor rod 11 is connected to the connecting rod through the connecting nut 15, and then the connector and the cylinder are put on the connecting rod in turn. After the connecting assembly 20 is tightly against the support plate, the gasket and nut are installed in turn on the rear end section of the connecting rod exposed in the cylinder, and the cylinder is connected to the manual pump through the oil pipe. At this point, the connection and installation process of the exposed section of the anchor rod 11 and the puller 16 is completed. The pulling work can be carried out by turning on the manual pump. The connecting assembly 20 supports the puller 16, so that the pulling of the anchor rod 11 by the puller 16 is more stable.

[0047] The anchoring agent 12 is injected during the process of rotating and installing the anchor rod 11, and the anchoring agent 12 can be fully stirred to make the anchoring force of the anchor rod 11 uniform. On this basis, the connecting component 20 is installed to connect it with the pulling device 16. The connecting component 20 stably supports the pulling device 16 to pull the anchor rod 11, and can arbitrarily pull the pipe seam anchor rod 11 installed by this method, with fewer constraints and simpler and more convenient use.

[0048] Example 2

[0049] Figure 3-Figure 6 In the embodiment, the connection assembly 20 includes a mounting seat 21 and a plurality of connection frames 22. One end of the connection frame 22 is rotatably inserted into the mounting seat 21. The other end of the connection frame 22 is rotatably inserted with a screw rod 23. One end of the screw rod 23 is provided with an adjustment block 24. The other end of the screw rod 23 is provided with an abutment member 25.

[0050] After the puller 16 is connected to the anchor rod 11, the multiple connecting frames 22 are pushed to deflect and make them parallel to the anchor rod 11. The adjusting block 24 is used to rotate the screw rod 23 so that its end abutment 25 contacts the rock wall. The puller 16 is supported by the connecting assembly 20 to be stably set on the rock wall.

[0051] The connecting assembly 20 also includes a fixing member 26, which includes a fixing block 261 movably inserted into the connecting frame 22, a return spring 262 is fixedly connected between the fixing block 261 and the connecting frame 22, and a pushing block 263 is provided on one side of the fixing block 261, and the pushing block 263 is fixedly connected to the screw rod 23.

[0052] The bottom of the pushing block 263 is conical, and the end of the fixing block 261 matches the pushing block 263 .

[0053] After the puller 16 is installed, the multiple connecting frames 22 are pushed to deflect and make them parallel to the anchor rod 11. The adjusting block 24 is used to rotate the screw rod 23 to move the end abutment 25, and the pushing block 263 moves accordingly and contacts the pushing block 263. Since the bottom of the pushing block 263 is conically set and the end of the fixed block 261 matches the pushing block 263, the fixed block 261 is pushed by the pushing block 263 and inserted into the mounting seat 21. The connecting frame 22 is fixed and restricted on the mounting seat 21 to remain parallel to the anchor rod 11. When the abutment 25 contacts the rock wall, the puller 16 is supported by the connecting assembly 20 to stably set it on the rock wall.

[0054] The provided connection assembly 20 can adjust the position of the abutment 25 at the end of the screw rod 23 so that it contacts the uneven rock wall at different lengths, thereby stably supporting the puller 16 and preventing the puller 16 from moving suddenly during the test, which may cause equipment damage or personal injury, and can reduce errors caused by equipment instability, making the test results more accurate.

[0055] Figure 3-Figure 6 In the embodiment, the abutment member 25 comprises a mounting block 251 and a rotating block 252 rotatably inserted in the mounting block 251 . The mounting block 251 is rotatably sleeved on the surface of the screw rod 23 , and the abutment block 253 is rotatably inserted in the rotating block 252 .

[0056] A blocking block 254 is disposed on one side of the abutting block 253 , and a screw rod 255 threadably sleeved with the mounting block 251 is rotatably inserted into one side of the blocking block 254 .

[0057] When the abutment 25 comes into contact with the rock wall, the rotating block 252 is adjusted to change the deflection and fitting direction of the bottom abutment block 253. After a part of the surface of the abutment block 253 comes into contact with the rock wall, the abutment block 253 is automatically deflected and adjusted to maintain the maximum contact area with the surface of the rock wall. Then, the screw 255 is rotated to move the position of the blocking block 254, and the blocking block 254 blocks the reverse movement path of the abutment 25 to avoid unstable support.

[0058] The abutment member 25 can adjust the fitting surface to maintain the maximum contact area with the rock wall surface, so as to adapt to the use of rock walls in more complex environments. There is no need to level the rock wall, and the pulling work of the anchor rod 11 is simpler.

[0059] Figure 3-Figure 6 In the embodiment, a limiting rod 256 is provided on the top of the mounting block 251 , and one end of the limiting rod 256 is movably inserted into the connecting frame 22 .

[0060] The limiting rod 256 is used to limit the moving path of the mounting block 251 , so as to prevent the mounting block 251 from rotating along with the rotation of the screw rod 23 , thereby ensuring the stability of the movement of the abutment member 25 .

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A hollow anchoring and pulling method for a pipe seam anchor rod (11), characterized in that: The following steps are involved: S1, anchor rod (11) installation; After drilling a mounting hole using a drilling machine, the end of the anchor rod (11) is inserted into the mounting hole and an anchoring agent (12) is injected into the mounting hole; S2, anchoring with anchor rod (11); The exposed section of the anchor rod (11) is connected to the stirrer (14) using a torque nut (13). The drilling rig cooperates with the stirrer (14) to rotate the anchor rod (11) to stir the anchoring agent (12) and push the anchor rod (11) to the bottom of the installation hole. After the anchoring agent (12) solidifies, the stirrer (14) is removed. S3, connecting the pulling instrument (16); The exposed section of the anchor rod (11) is connected to the puller (16) using a connecting nut (15), and then the installation state of the connecting assembly (20) is adjusted so that it contacts the rock wall to support the puller (16); S4, pulling out the anchor rod (11); The anchor rod (11) is pulled out using a pulling instrument (16). When the anchor rod (11) is pulled out or broken, the maximum pulling force of the anchor rod (11) is recorded.

2. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 1, characterized in that: The connection assembly (20) comprises a mounting seat (21) and a plurality of connection frames (22), one end of the connection frame (22) is rotatably inserted into the mounting seat (21), the other end of the connection frame (22) is rotatably inserted with a screw rod (23), one end of the screw rod (23) is provided with an adjustment block (24), and the other end of the screw rod (23) is provided with an abutment member (25); After the puller (16) is connected to the anchor rod (11), the plurality of connecting frames (22) are pushed to deflect so as to make them parallel to the anchor rod (11), and the screw rod (23) is rotated using the adjustment block (24) so ​​that its end abutment piece (25) contacts the rock wall. The puller (16) is supported by the connecting assembly (20) and stably set on the rock wall.

3. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 2, characterized in that: The connecting assembly (20) further comprises a fixing member (26), wherein the fixing member (26) comprises a fixing block (261) movably inserted into the interior of the connecting frame (22), a return spring (262) being fixedly connected between the fixing block (261) and the connecting frame (22), and a pushing block (263) being provided on one side of the fixing block (261), and the pushing block (263) being fixedly connected to the screw rod (23).

4. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 3, characterized in that: The bottom of the pushing block (263) is conical, and the end of the fixing block (261) matches the pushing block (263).

5. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 2, characterized in that: The abutment member (25) comprises a mounting block (251) and a rotating block (252) rotatably inserted into the mounting block (251); the mounting block (251) is rotatably sleeved on the surface of the screw rod (23); and the abutment block (253) is rotatably inserted into the interior of the rotating block (252).

6. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 5, characterized in that: A blocking block (254) is provided on one side of the abutment block (253), and a screw rod (255) threadedly sleeved with the mounting block (251) is rotatably inserted on one side of the blocking block (254).

7. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 5, characterized in that: A limiting rod (256) is provided on the top of the mounting block (251), and one end of the limiting rod (256) is movably inserted into the connecting frame (22).

8. A hollow anchoring and pulling method for a pipe seam anchor rod (11) according to claim 2, characterized in that: The connection assembly (20) comprises a connection tube, one end of which is provided with a support plate that fits against the rock wall, and the other end of which is fixedly connected to the pulling instrument (16).

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