Dynamic pre-stressed anchor rod structure

Abstract

The utility model discloses a dynamic type pre-stressed anchor rod structure which comprises an anchor rod body which is arranged to be of a linear type rod-shaped structure, and further comprises an anchor head structure used for serving as an anchor rod end head part, an anchoring structure used for meeting the anchoring requirement of the anchor rod and a tensioning structure used for meeting the tensioning requirement of the anchor rod. The anchor head structure is assembled at one end of the anchor rod main body, the anchoring structure is arranged at one end, far away from the anchor head structure, of the anchor rod main body, and the tensioning structure is arranged between the anchor head structure and the anchoring structure. The installation stability of the pre-stressed anchor rod can be guaranteed, rapid installation and disassembly of the pre-stressed anchor rod can be achieved, the fastening effect is good, the anchoring capacity of the pre-stressed anchor rod can be effectively improved through the anchoring structure and the dynamic torsion structure, the tensioning structure is arranged, adaptive deformation can be generated according to the stress change of the anchoring environment, and the sudden change resisting capacity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting anchor rods, in particular to a dynamic prestressed anchor rod structure. Background Art

[0002] In the prior art, in highway tunnel engineering and mine construction, anchor rods are often used for support to maintain the unformed surrounding rock, creating a safe working environment for tunnel excavation and mine stability. The types of anchor rods commonly used in the industry currently include mortar anchor rods, drug coil anchor rods, grouting anchor rods, self-propelled anchor rods, combined anchor rods, resin anchor rods, wedge-type end-anchored anchor rods and prestressed anchor rods. The anchor rods use the anchoring force to connect the surrounding rock to be supported with the stable rock formation to form an overall force, thereby improving the stability of the surrounding rock. Therefore, enhancing the anchoring force of the anchor rod to prevent the anchor rod from becoming unstable is the focus of anchor rod support. Prestressed anchor rods mainly use high-strength precision-rolled threaded steel as the main load-bearing components, and are composed of anchor heads, rod bodies and pads. By prestressing and locking the steel bars, the anchoring force generated by the anchor heads is used to apply a certain pre-compressive stress to the surrounding rock, and the surrounding rock is actively reinforced. Prestressed anchor rod frames are mainly used for anchoring strata that are in the form of fragments and above, and the effect is better. However, the existing prestressed anchor rod structure is relatively complex, and the operation steps during construction are relatively cumbersome. In addition, its prestress is fixed and cannot be changed according to the stress changes in the anchoring environment. When the stress in the anchoring environment changes, its anchoring force and anchoring effect will decrease, affecting the support stability of the anchor rod.

[0003] The Chinese utility model patent with application number: 202120168077.5 discloses a prestressed anchor rod, including an anchor rod body, a fastening bolt is arranged on one side of the main body, a support plate is arranged on one side of the fastening bolt and on the main body, a support tube is connected to one side of the support plate, an exhaust pipe is connected to one side of the support tube, a grouting pipe is connected to the other side of the support tube, a sleeve is connected to the support tube inside and on the main body, a plugging plate is arranged on one side of the sleeve and on the main body, an oil injection pipe is arranged on one side of the plugging plate, a plugging cone is connected to the other side of the plugging plate, a protective tube is arranged on the inside of the plugging cone and on the main body, a plurality of oil outlet holes are arranged circumferentially on one side of the protective tube, and a fixing ring plate is arranged on the other side of the protective tube and on the main body. However, the structure of this kind of prestressed anchor rod is relatively complex, more parts are required, and the installation method is relatively cumbersome. It is made of a combined multi-stage structure, the installation stability is poor, it cannot produce adaptive deformation according to the stress changes of the anchoring environment, and the anti-sudden change ability is poor. Utility Model Content

[0004] The utility model aims to provide a dynamic prestressed anchor rod structure.

[0005] In order to achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A dynamic prestressed anchor rod structure comprises an anchor rod body, which is configured as a linear rod-shaped structure, and also comprises an anchor head structure used as an end portion of the anchor rod, an anchor structure used to meet the anchoring requirements of the anchor rod, and a tensioning structure used to meet the tensioning requirements of the anchor rod, wherein the anchor head structure is assembled at one end of the anchor rod body, the anchor structure is arranged at one end of the anchor rod body away from the anchor head structure, and the tensioning structure is configured between the anchor head structure and the anchor structure.

[0007] The anchor head structure includes an anchor head body and a limiting end block, wherein the anchor head body is arranged at one end of the anchor rod body and is sleeved with the anchor rod body, the limiting end block is arranged on one side of the anchor head body and is integrally formed with the anchor head body, and the limiting end block is sleeved with the anchor rod body.

[0008] It also includes an installation thread, which is arranged on the side of one end of the anchor rod body corresponding to the anchor head body and the limiting end block, and the installation thread is an external thread. The interior of the anchor head body and the limiting end block is provided with an internal thread, and the anchor head body and the limiting end block are threadedly connected to one end of the anchor rod body through the internal thread and the installation thread.

[0009] The anchor head body is composed of an integrally formed annular portion and a hemispherical portion. The annular portion is arranged at one end of the anchor head body close to the limiting end block, and the spherical surface of the hemispherical portion is arranged on the side of the annular portion away from the limiting end block. The annular portion and the hemispherical portion together form a hemispherical end block structure.

[0010] The limiting end block is set as a hexagonal prism structure and its interior is set as a hollow structure. The corner of one end of the limiting end block away from the anchor head body is set as an arc chamfered structure, and the connection between the limiting end block and the anchor head body is set as an arc chamfered structure.

[0011] The anchoring structure includes a knot and a connecting part. The knot is provided with two groups, each group of the knot is composed of a number of adjacent staggered protrusions, the two groups of the knots are intertwined and arranged on the side of one end of the anchor rod body away from the anchor head body, the connecting part is arranged at one end of the knot close to the anchor head body, and the knot and the connecting part are integrally formed.

[0012] The two groups of twisted knots are intertwined to form a dynamic torsion structure, and the dynamic torsion structure is a cut twist-shaped structure.

[0013] The tensioning structure includes an anti-tensile knot and a tensioning part. The anti-tensile knot is provided with two groups. Each group of the anti-tensile knots consists of two twisted and staggered protrusions. The two groups of the anti-tensile knots are adjacently arranged at one end of the connecting part away from the kink and are integrally formed with the connecting part. The tensioning part is arranged at one end of the anti-tensile knot away from the connecting part and is integrally formed with the anti-tensile knot.

[0014] The tensioning portion is a straight rod structure, and the mounting thread, the tensioning portion, the anti-tension knot, the connecting portion and the kink are sequentially arranged adjacent to each other and integrally formed to form the anchor rod body.

[0015] The hemispherical portion of the anchor head body is arranged toward the tensioning portion.

[0016] The beneficial effects of the utility model are:

[0017] The structure is simple and is equipped with an anchor head structure, which together with the anchor body constitutes a detachable prestressed anchor structure, which can ensure the installation stability of the prestressed anchor and realize its rapid installation and disassembly, with good fastening effect. It is equipped with an anchoring structure, and its dynamic torsion structure can effectively improve the anchoring capacity of the prestressed anchor. It is equipped with a tensioning structure, which can produce adaptive deformation according to the stress changes of the anchoring environment, and has strong anti-mutation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the anchor head structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the coordination between the anchor head structure and the anchor rod body of the utility model;

[0021] Figure 4 It is a schematic diagram of the cooperation between the anchor head body and the installation thread of the utility model.

[0022] In the figure: 1. Anchor rod body; 2. Anchor head body; 3. Limit end block; 4. Installation thread; 5. Twist knot; 6. Connection part; 7. Anti-tensile knot; 8. Tensioning part. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] A dynamic prestressed anchor structure includes an anchor body 1, the anchor body 1 is a linear rod-shaped structure, and also includes an anchor head structure used as an anchor end portion, an anchor structure used to meet the anchoring requirements of the anchor, and a tensioning structure used to meet the tensioning requirements of the anchor. The anchor head structure is assembled at one end of the anchor body 1, the anchor structure is arranged at one end of the anchor body 1 away from the anchor head structure, and the tensioning structure is arranged between the anchor head structure and the anchor structure. The overall structural schematic diagram of the utility model is as shown in FIG. Figure 1 shown.

[0025] The anchor head structure includes an anchor head body 2 and a limiting end block 3, the anchor head body 2 is arranged at one end of the anchor rod body 1 and is sleeved with the anchor rod body 1, the limiting end block 3 is arranged on one side of the anchor head body 2 and is integrally formed with the anchor head body 2, the limiting end block 3 is sleeved with the anchor rod body 1, the anchor head structure cooperates with the anchor head body 2 and the limiting end block 3, and the anchor head structure cooperates with the anchor head body 2 and the limiting end block 3 to jointly constitute the end portion of the prestressed anchor rod, wherein the anchor head body 2 is used to provide installation support for the limiting end block 3, and the limiting end block 3 is used to jointly constitute the end portion of the prestressed anchor rod with the anchor head body 2. The schematic diagram of the anchor head structure of the utility model is shown as follows Figure 2 shown.

[0026] The mounting thread 4 is also included. The mounting thread 4 is arranged on the side of one end of the anchor rod body 1 corresponding to the anchor head body 2 and the limiting end block 3, and the mounting thread 4 is an external thread. The interior of the anchor head body 2 and the limiting end block 3 is provided with an internal thread. The anchor head body 2 and the limiting end block 3 are threadedly connected to one end of the anchor rod body 1 through the internal thread and the mounting thread 4. The mounting thread 4 is used as a mounting structure on the anchor rod body 1, thereby providing mounting support for the anchor head structure to realize the rapid disassembly and assembly connection between the anchor rod body 1 and the anchor head structure. The schematic diagram of the coordination between the anchor head structure and the anchor rod body 1 of the utility model is shown in Figure 3 shown.

[0027] The anchor head body 2 is composed of an integrally formed annular portion and a hemispherical portion, the annular portion is arranged at one end of the anchor head body 2 close to the limiting end block 3, the spherical surface of the hemispherical portion is arranged on the side of the annular portion away from the limiting end block 3, the annular portion and the hemispherical portion together form a hemispherical end block structure, wherein the hemispherical anchor head is used as a limiting structure at the end of the anchor head structure, while limiting the limiting end block 3, the structure of the limiting end block 3 is optimized to improve its smoothness of use, the schematic diagram of the coordination of the anchor head body 2 and the mounting thread 4 of the utility model is shown in Figure 4 shown.

[0028] The limiting end block 3 is configured as a hexagonal prism structure and its interior is configured as a hollow structure, the corner of the end of the limiting end block 3 away from the anchor head body 2 is configured as an arc chamfered structure, and the connection between the limiting end block 3 and the anchor head body 2 is configured as an arc chamfered structure, wherein the corners of the limiting end block 3 are all configured as arc chamfered structures, which can improve the overall appearance and smoothness of the anchor head structure, and prevent the anchor head structure from causing scratches to the user during use, thereby improving the safety of the anchor head structure.

[0029] The anchoring structure includes a knot 5 and a connecting portion 6. The knot 5 is provided with two groups, and each group of the knot 5 is composed of a number of adjacent staggered protrusions. The two groups of knots 5 are intertwined and arranged at the side of one end of the anchor rod body 1 away from the anchor head body 2. The connecting portion 6 is arranged at the end of the knot 5 close to the anchor head body 2. The knot 5 and the connecting portion 6 are integrally formed. The two groups of knots 5 are intertwined to form a dynamic torsion structure. The dynamic torsion structure is a cut-type twist-like structure. The anchoring structure cooperates with the knot 5 and the connecting portion 6 to form a dynamic anchoring structure, wherein the knot 5 is used to improve the strength and tensile strength of the prestressed anchor rod, thereby improving the anchoring effect of the prestressed anchor rod. The connecting portion 6 is used to connect the anchoring structure with the tensioning structure to form a dynamic anchoring structure. The dynamic torsion structure of the cut-type twist-like structure can enhance the anchoring force and increase the elongation, and is suitable for support systems with faults in rock strata in tunnel support.

[0030] The tensioning structure includes a tensioning knot 7 and a tensioning portion 8. The tensioning knot 7 is provided with two groups, each group of the tensioning knot 7 is composed of two torsionally staggered protrusions, the two groups of the tensioning knots 7 are adjacently arranged at one end of the connecting portion 6 away from the kink 5 and are integrally formed with the connecting portion 6, the tensioning portion 8 is arranged at one end of the tensioning knot 7 away from the connecting portion 6 and is integrally formed with the tensioning knot 7, the tensioning structure is coordinated by the tensioning knot 7 and the tensioning portion 8 to form the tensioning portion 8 of the prestressed anchor rod to produce adaptive deformation according to the stress change of the anchoring environment, wherein the tensioning knot 7 is used as the tensioning knot 7 structure of the tensioning portion 8 of the prestressed anchor rod, and the tensioning portion 8 is used to produce adaptive deformation according to the stress change of the anchoring environment, thereby improving the anti-sudden change ability of the prestressed anchor rod.

[0031] The tensioning portion 8 is a straight rod structure, and the mounting thread 4, the tensioning portion 8, the anti-tension knot 7, the connecting portion 6 and the kink 5 are arranged adjacent to each other in sequence and integrally formed to form the anchor rod body 1, and the hemispherical portion of the anchor head body 2 is arranged toward the tensioning portion 8, wherein the anchor rod body 1 is integrally formed, which can ensure the simplicity of the prestressed anchor rod structure while improving its anchoring effect and anti-sudden change ability.

[0032] Working principle:

[0033] The prestressed anchor rod is anchored in the rock layer that needs to be supported. Under the supporting state, the anchor head structure abuts against the rock layer through the tray to achieve the anchoring of the prestressed anchor rod. The anchoring structure is anchored to the rock layer through the dynamic torsion structure. Under the same conditions, the anchoring effect of the dynamic torsion structure is better than that of the linear anchor rod structure. When the stress of the anchoring environment changes, the tensioning structure deforms with the stress change to prevent the prestressed anchor rod from breaking or falling off, thereby ensuring the support effect and anti-mutation ability of the prestressed anchor rod.

[0034] The beneficial effects of the utility model are that the structure is simple and an anchor head structure is provided, which together with the anchor rod body constitutes a detachable prestressed anchor rod structure, which can ensure the installation stability of the prestressed anchor rod and realize its rapid installation and disassembly, and has a good fastening effect. An anchor structure is provided, and the anchoring capacity of the prestressed anchor rod can be effectively improved through its dynamic torsion structure. A tensioning structure is provided, which can produce adaptive deformation according to the stress changes of the anchoring environment, and has strong anti-mutation ability.

[0035] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A dynamic prestressed anchor rod structure, comprising an anchor rod body (1), wherein the anchor rod body (1) is configured as a linear rod-shaped structure, characterized in that: It also comprises an anchor head structure used as the end head of the anchor rod, an anchor structure used to meet the anchor rod anchoring requirements, and a tensioning structure used to meet the anchor rod tensioning requirements, the anchor head structure is assembled at one end of the anchor rod body (1), the anchor structure is arranged at one end of the anchor rod body (1) away from the anchor head structure, and the tensioning structure is arranged between the anchor head structure and the anchor structure; The anchor head structure comprises an anchor head body (2) and a limiting end block (3), wherein the anchor head body (2) is arranged at one end of the anchor rod body (1) and is sleeved with the anchor rod body (1), and the limiting end block (3) is arranged at one side of the anchor head body (2) and is integrally formed with the anchor head body (2), and the limiting end block (3) is sleeved with the anchor rod body (1); The anchoring structure comprises a knot (5) and a connecting portion (6), wherein the knot (5) is provided with two groups, each group of the knot (5) is composed of a plurality of adjacent protrusions arranged in an alternating manner, the two groups of the knots (5) are intertwined and arranged at the side of one end of the anchor rod body (1) away from the anchor head body (2), the connecting portion (6) is arranged at one end of the knot (5) close to the anchor head body (2), and the knot (5) and the connecting portion (6) are integrally formed.

2. A dynamic prestressed anchor structure as claimed in claim 1, characterized in that: The invention also comprises a mounting thread (4), wherein the mounting thread (4) is arranged on the side of one end of the anchor rod body (1) corresponding to the anchor head body (2) and the limiting end block (3), and the mounting thread (4) is an external thread, and the interior of the anchor head body (2) and the limiting end block (3) is provided with an internal thread, and the anchor head body (2) and the limiting end block (3) are threadedly connected to one end of the anchor rod body (1) through the internal thread and the mounting thread (4).

3. A dynamic prestressed anchor structure as claimed in claim 2, characterized in that: The anchor head body (2) is composed of an integrally formed annular portion and a hemispherical portion. The annular portion is arranged at one end of the anchor head body (2) close to the limiting end block (3), and the spherical surface of the hemispherical portion is arranged on a side of the annular portion away from the limiting end block (3). The annular portion and the hemispherical portion together form a hemispherical end block structure.

4. A dynamic prestressed anchor structure as claimed in claim 3, characterized in that: The limiting end block (3) is configured as a hexagonal prism structure and its interior is configured as a hollow structure; the corner of one end of the limiting end block (3) away from the anchor head body (2) is configured as an arc chamfered structure; and the connection between the limiting end block (3) and the anchor head body (2) is configured as an arc chamfered structure.

5. A dynamic prestressed anchor structure as claimed in claim 4, characterized in that: The two groups of twisted knots (5) are intertwined to form a dynamic twisting structure, and the dynamic twisting structure is a cut twist-shaped structure.

6. A dynamic prestressed anchor structure as claimed in claim 5, characterized in that: The tensioning structure comprises an anti-tension knot (7) and a tensioning portion (8), wherein the anti-tension knot (7) is provided with two groups, each group of the anti-tension knot (7) is composed of two protrusions arranged in a twisted and staggered manner, the two groups of the anti-tension knots (7) are adjacently arranged at one end of the connecting portion (6) away from the kink (5) and are integrally formed with the connecting portion (6), and the tensioning portion (8) is arranged at one end of the anti-tension knot (7) away from the connecting portion (6) and is integrally formed with the anti-tension knot (7).

7. A dynamic prestressed anchor structure as claimed in claim 6, characterized in that: The tensioning portion (8) is a straight rod structure, and the mounting thread (4), the tensioning portion (8), the anti-tension knot (7), the connecting portion (6) and the kink (5) are arranged adjacent to each other in sequence and integrally formed to form the anchor rod body (1).

8. A dynamic prestressed anchor structure as claimed in claim 7, characterized in that: The hemispherical portion of the anchor head body (2) is arranged toward the tensioning portion (8).

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