A high-strength hollow grouting anchor rod and a hollow grouting anchor rod assembly

Abstract

The utility model provides a high-strength hollow grouting anchor rod and a hollow grouting anchor rod assembly, which can improve the anchoring performance of traditional grouting anchor rods and are easy to drill. The hollow grouting anchor rod comprises: a grouting pipe, a plurality of threaded ribbed steel bars, a combination head and an anchor head, wherein one or more grouting hole groups are arranged on the pipe wall of the grouting pipe; the threaded ribbed steel bars are welded to the pipe wall of the grouting pipe, and the threaded ribbed steel bars occupy the remaining pipe wall positions except the grouting hole groups; the combination head is arranged at one end of the grouting pipe and the threaded ribbed steel bars, and the first end heads of the grouting pipe and the threaded ribbed steel bars are accommodated in the combination head; the anchor head is arranged at the other end of the grouting pipe and the threaded ribbed steel bars, and the second end heads of the grouting pipe and the threaded ribbed steel bars are accommodated in the anchor head.

Description

Technical Field

[0001] The utility model relates to the field of grouting anchor rods, in particular to a high-strength hollow grouting anchor rod and a hollow grouting anchor rod assembly. Background Art

[0002] Grouting anchor is a product developed according to the actual needs of my country's tunnel engineering, slope control engineering, coal mine tunnel engineering, etc. The anchor body of the grouting anchor adopts a hollow design. The hole in the rod body is used as a high-pressure drilling channel and a grouting channel. Compared with a solid rod body, the hollow rod body design can obtain better rigidity and shear strength. The outer surface of the anchor body has a full-length standard large-pitch thread structure. The thread structure facilitates the cutting and extension of the anchor. Compared with a smooth rod body, it increases the bonding area between the anchor body and the grouting material, thereby improving the anchoring force.

[0003] However, during the drilling process, it is not suitable to drill when encountering a relatively hard rock formation. When encountering a soft rock or loose rock formation environment, since the traditional grouting anchor rod only has threads on the outer wall, especially the gap between the anchoring material and the grouting anchor rod is relatively smooth, the anchoring between the rock formation, the anchoring material and the grouting anchor rod is prone to failure. Utility Model Content

[0004] The utility model aims to provide a high-strength hollow grouting anchor rod and a hollow grouting anchor rod assembly, which can improve the anchoring performance of traditional grouting anchor rods and are easy to drill.

[0005] The embodiment of the utility model is achieved as follows:

[0006] A high-strength hollow grouting anchor rod comprises: a grouting pipe, a plurality of threaded ribbed steel bars, a combined head and an anchor head, wherein one or more grouting hole groups are arranged on the pipe wall of the grouting pipe; the threaded ribbed steel bars are welded to the pipe wall of the grouting pipe, and the threaded ribbed steel bars occupy the remaining pipe wall positions except the grouting hole groups; the combined head is arranged at one end of the grouting pipe and the threaded ribbed steel bars, and the first end heads of the grouting pipe and the threaded ribbed steel bars are received in the combined head; the anchor head is arranged at the other end of the grouting pipe and the threaded ribbed steel bars, and the second end heads of the grouting pipe and the threaded ribbed steel bars are received in the anchor head.

[0007] In a preferred embodiment of the utility model, the inner and outer walls of the two end ends of the grouting pipe are respectively provided with a first thread and a second thread, and the first end of the grouting pipe is longer than the first end of the threaded ribbed steel bar.

[0008] In a preferred embodiment of the utility model, the above-mentioned combination head includes: a combination nut, a combination bolt and an annular clamp, a first threaded hole is provided in the middle of the combination nut for the first end of the grouting pipe to be screwed in or partially screwed in, a first groove is also provided in the center of one end of the combination nut, which is recessed along the axial direction, and the radius of the first groove is larger than the sum of the diameter of the threaded ribbed steel bar and the radius of the grouting pipe; a second groove is also provided in the center of the other end of the combination nut, which is recessed along the axial direction; the combination bolt enters from the first threaded hole and is screwed into the grouting pipe, and the combination bolt is hidden in the second groove; the annular clamp is inserted into the combination nut from the direction of the first groove to fill the gap between the combination nut and the grouting pipe and the threaded ribbed steel bar.

[0009] In a preferred embodiment of the utility model, the above-mentioned annular clamp includes: an annular body, a triangular clamp and a fan-shaped annular clamp, and a disconnected section is provided on the annular body; a plurality of triangular clamps are provided on the outer ring surface of the annular body, and the number of triangular clamps matches the number of threaded ribbed steel bars; the fan-shaped annular clamp is provided on the outer ring surface of the annular body, and the disconnected section is located in the fan-shaped annular clamp area.

[0010] In a preferred embodiment of the utility model, the above-mentioned anchor head is an alloy anchor head, and a third groove recessed along the axial direction is further provided at the center of one end of the alloy anchor head, and a second threaded hole is provided through the center of the third groove to the other end, and the alloy anchor head is threadedly connected to the grouting pipe; the other end of the alloy anchor head is provided with an olive-shaped stirring blade distributed in a circular array based on the second threaded hole; the second threaded hole of the anchor head is provided with a locking screw connected to the grouting pipe.

[0011] A high-strength hollow grouting anchor assembly comprises any of the above-mentioned hollow grouting anchors, and the anchor assembly further comprises: a grouting stop valve, a pad, and an anchor bolt anchor which are sequentially sleeved on the hollow grouting anchor, and the combined head is exposed outside the anchor bolt anchor.

[0012] In a preferred embodiment of the utility model, the above-mentioned bolt anchor comprises: a YGM anchor and a clip arranged in the YGM anchor, the clip comprises a first clip and a second clip, and a fan-shaped gasket is arranged on the inner side of the second clip.

[0013] The beneficial effects of the embodiments of the utility model are:

[0014] 1. The grouting anchor in the utility model is provided with a plurality of threaded ribbed steel bars on the outer wall of the pipe. With the help of the external spiral ribs of the threaded ribbed steel bars, the occlusal surface of the grouting anchor and the adhesive is increased, so that the anchoring effect of the grouting anchor is better;

[0015] 2. During the grouting process, the spiral ribs on the outer wall of the threaded ribbed steel bar are also conducive to the discharge of slurry, avoiding adverse effects such as pores during the grouting process;

[0016] 3. By setting the combined head and anchor head, the threaded ribbed steel bar and the grouting anchor rod are welded firmly, forming the threaded ribbed steel bar and the grouting anchor rod into a whole, avoiding on-site assembly, and achieving better drilling, grouting and anchoring effects;

[0017] 4. The anchor head is set to a structure that is easier to break the soil layer, which makes construction easier than the traditional hydraulic insertion method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the high-strength hollow grouting anchor structure of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the split structure of the high-strength hollow grouting anchor rod according to an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the grouting pipe and threaded ribbed steel bar structure of an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the anchor head structure of an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the annular clamp structure of an embodiment of the utility model;

[0024] Figure 6 This is a schematic structural diagram of a high-strength hollow grouting anchor rod assembly according to an embodiment of the utility model.

[0025] Icons: grouting pipe 110; grouting hole group 111; first thread 112; second thread 113; threaded ribbed steel bar 120; combination head 130; combination nut 131; combination bolt 132; annular clamp 133; first groove 134; second groove 135; annular body 136; triangular clamp 137; fan annular clamp 138; anchor head 140; second threaded hole 141; third groove 142; stirring blade 143; locking screw 144; slurry stop valve 200; pad 300; anchor rod anchor 400; YGM anchor 410; clip 420; first clip 421; second clip 422; fan annular gasket 423. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] First embodiment

[0033] See also Figure 1-5 The present embodiment provides a high-strength hollow grouting anchor rod, which includes a grouting pipe 110, a plurality of threaded ribbed steel bars 120 arranged on the outer ring of the grouting pipe 110, a combined head 130 and an anchor head 140 used to connect the grouting pipe 110 and the threaded ribbed steel bars 120 and arranged at both ends of the pipe.

[0034] Specifically, the structure of the grouting pipe 110 is not much different from the traditional grouting pipe 110. One or more grouting hole groups 111 are arranged on the pipe wall of the grouting pipe 110 for injecting concrete anchoring slurry or injecting resin anchoring slurry in the early stage.

[0035] The threaded ribbed steel bars 120 are welded to the pipe wall of the grouting pipe 110, and the threaded ribbed steel bars 120 occupy the remaining pipe wall positions except the grouting hole group 111, or occupy the remaining pipe wall positions outside the grouting hole group 111, so that the grouting pipe 110 and the threaded ribbed steel bars 120 form a drilled whole.

[0036] Specifically, the inner and outer walls of the two end ends of the grouting pipe 110 are respectively provided with a first thread 112 and a second thread 113, and the first end of the grouting pipe 110 is longer than the first end of the threaded ribbed steel bar 120. In the present embodiment, the threaded ribbed steel bar 120 is a whole threaded ribbed steel bar 120. In other embodiments, considering the cost and other issues, the threaded ribbed steel bar 120 can also be provided on the outer wall of a part of the grouting pipe 110. For example, the front, middle and rear grouting pipes are each provided with a section of threaded ribbed steel bar 120 surrounding the outer wall of the grouting pipe.

[0037] Among them, the combination head 130 is arranged at one end of the grouting pipe 110 and the threaded ribbed steel bar 120, and the first end heads of the grouting pipe 110 and the threaded ribbed steel bar 120 are accommodated in the combination head 130. The combination head 130 is used to provide protection to prevent the threaded ribbed steel bar 120 from injuring people when being assembled on the grouting equipment.

[0038] Specifically, the combination head 130 includes a combination nut 131, a combination bolt 132 and an annular clamp 133. A first threaded hole is provided in the middle of the combination nut 131 for the first end of the grouting pipe 110 to be screwed in or partially screwed in. A first groove 134 is also provided in the center of one end of the combination nut 131, which is recessed along the axial direction. The radius of the first groove 134 is larger than the sum of the diameter of the threaded ribbed steel bar 120 and the radius of the grouting pipe 110; a second groove 135 is also provided in the center of the other end of the combination nut 131, which is recessed along the axial direction; the combination bolt 132 enters from the first threaded hole and is screwed into the grouting pipe 110, and the combination bolt 132 is hidden in the second groove 135; the annular clamp 133 is inserted into the combination nut 131 from the direction of the first groove 134 to fill the gap between the combination nut 131 and the grouting pipe 110 and the threaded ribbed steel bar 120.

[0039] During assembly, the grouting pipe 110 and one end of the threaded ribbed steel bar 120 are screwed into the combination nut 131, the external thread of one end of the grouting pipe 110 is connected to the first threaded hole of the combination nut 131, and then the combination bolt 132 is screwed into the combination nut 131 from another direction, so that the thread of the combination bolt 132 is connected to the internal thread of the grouting pipe 110, thereby forming a whole. Then the annular clamp 133 is inserted into the combination nut 131.

[0040] The annular clamp 133 includes: an annular body 136, a triangular clamp 137 and a fan-shaped annular clamp 138, and a disconnected section is provided on the annular body 136; a plurality of triangular clamps 137 are provided on the outer ring surface of the annular body 136, and the number of triangular clamps 137 matches the number of threaded ribbed steel bars 120; the fan-shaped annular clamp 138 is provided on the outer ring surface of the annular body 136, and the disconnected section is located in the fan-shaped annular clamp 138 area.

[0041] The annular clip 133 in this embodiment is in a disconnected form to facilitate insertion of the clip. The triangular clip 137 is used to fill the gap between the threaded ribbed steel bar 120 and the inner wall of the combination nut 131. The fan-shaped clip is used to fill the gap between the grouting pipe 110 and the inner wall of the combination nut 131.

[0042] In this embodiment, the anchor head 140 is arranged at the other end of the grouting pipe 110 and the threaded ribbed steel bar 120, and the second end heads of the grouting pipe 110 and the threaded ribbed steel bar 120 are received in the anchor head 140. The anchor head 140 is mainly used to improve the drilling effect and shorten the drilling time during the drilling process of the high-strength hollow grouting anchor.

[0043] Specifically, the anchor head 140 in this embodiment is an alloy anchor head, and a third groove 142 is also provided at the center of one end of the alloy anchor head 140, which is recessed along the axial direction. A second threaded hole 141 is provided through the center of the third groove 142 to the other end, and the alloy anchor head 140 is threadedly connected to the grouting pipe 110; an olive-shaped stirring blade 143 is provided at the other end of the alloy anchor head 140, which is distributed in a circular array based on the second threaded hole 141; and a locking screw 144 is provided in the second threaded hole 141 of the anchor head 140, which is connected to the grouting pipe 110. After the alloy anchor head 140 is connected to the external thread of the grouting pipe, the locking screw 144 is screwed into the alloy anchor head and fixedly connected to the internal thread of the grouting pipe.

[0044] This embodiment also provides a high-strength hollow grouting anchor assembly, see Figure 6 , which includes the above-mentioned hollow grouting anchor rod, and the anchor rod assembly also includes: a grouting stop valve 200, a pad 300, and an anchor rod anchor 400 which are sequentially sleeved on the hollow grouting anchor rod, and the combined head 130 is exposed outside the anchor rod anchor 400.

[0045] The bolt anchor 400 comprises: a YGM anchor 410 and a clip 420 disposed in the YGM anchor 410 , wherein the clip 420 comprises a first clip 421 and a second clip 422 , and a fan-shaped gasket 423 is disposed inside the second clip 422 .

[0046] To sum up, the advantages of the new grouting anchor in this embodiment are: the grouting anchor is provided with multiple threaded ribbed steel bars 120 on the outer wall of the pipe. With the help of the external spiral ribs of the threaded ribbed steel bars 120, the bite surface of the grouting anchor and the adhesive is increased, so that the anchoring effect of the grouting anchor is better; during the grouting process, the spiral ribs on the outer wall of the threaded ribbed steel bars 120 are also conducive to the discharge of slurry, avoiding the adverse effects such as the generation of air holes during the grouting process; by setting the combined head 130 and the anchor head 140, the threaded ribbed steel bars 120 are firmly welded to the grouting anchor, and the threaded ribbed steel bars 120 and the grouting anchor are formed into a whole, avoiding on-site assembly, and the drilling, grouting and anchoring effects are better; the anchor head 140 is set to a structure that is easier to break the soil layer, and the construction is easier than the traditional hydraulic insertion method.

[0047] This specification describes examples of embodiments of the utility model, and it is not intended that these embodiments illustrate and describe all possible forms of the utility model. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings do not need to be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the utility model in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any of the drawings can be combined with the features illustrated in one or more other drawings to form embodiments that are not explicitly described or described. The described combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the utility model can be used for specific applications or implementations as needed.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-strength hollow grouting anchor, characterized in that: The hollow grouting anchor comprises: A grouting pipe, wherein one or more grouting hole groups are arranged on the pipe wall of the grouting pipe; A plurality of threaded ribbed steel bars, wherein the threaded ribbed steel bars are welded to the wall of the grouting pipe, and the threaded ribbed steel bars occupy the remaining positions of the wall except the grouting hole group; A combination head, which is arranged at one end of the grouting pipe and the threaded ribbed steel bar, and the first end of the grouting pipe and the threaded ribbed steel bar is received in the combination head; An anchor head is arranged at the other end of the grouting pipe and the threaded ribbed steel bar, and the second end heads of the grouting pipe and the threaded ribbed steel bar are accommodated in the anchor head.

2. The high-strength hollow grouting anchor according to claim 1, characterized in that: The inner and outer walls of the two end pipes of the grouting pipe are respectively provided with a first thread and a second thread, and the first end of the grouting pipe is longer than the first end of the threaded ribbed steel bar.

3. The high-strength hollow grouting anchor according to claim 2, characterized in that: The combined head comprises: A combination nut, wherein a first threaded hole is provided in the middle of the combination nut for the first end of the grouting pipe to be screwed in or partially screwed in, a first groove is also provided at the center of one end of the combination nut, which is concave along the axial direction, and the radius of the first groove is larger than the sum of the diameter of the threaded ribbed steel bar and the radius of the grouting pipe; a second groove is also provided at the center of the other end of the combination nut, which is concave along the axial direction; A combination bolt, the combination bolt enters from the first threaded hole and is screwed into the grouting pipe, and the combination bolt is hidden in the second groove; An annular clamp is inserted into the combination nut from the direction of the first groove to fill the gap between the combination nut and the grouting pipe and the threaded ribbed steel bar.

4. The high-strength hollow grouting anchor according to claim 3, characterized in that: The annular clip comprises: An annular body, wherein a disconnecting section is provided on the annular body; Triangular clips, a plurality of triangular clips are arranged on the outer annular surface of the annular body, and the number of the triangular clips matches the number of the threaded ribbed steel bars; The fan-shaped annular clamp is arranged on the outer annular surface of the annular body, and the disconnected section is located in the fan-shaped annular clamp area.

5. The high-strength hollow grouting anchor according to claim 2, characterized in that: The anchor head is an alloy anchor head, and a third groove recessed along the axial direction is provided at the center of one end of the alloy anchor head, and a second threaded hole is provided through the center of the third groove to the other end, and the alloy anchor head is threadedly connected to the grouting pipe; the other end of the alloy anchor head is provided with an olive-shaped stirring blade distributed in a circular array based on the second threaded hole; the second threaded hole of the anchor head is provided with a locking screw connected to the grouting pipe.

6. A high-strength hollow grouting anchor assembly, characterized in that: The hollow grouting anchor comprises any one of claims 1 to 5, wherein the anchor assembly further comprises: a grouting stop valve, a pad, and an anchor bolt which are sequentially sleeved on the hollow grouting anchor, and the combined head is exposed outside the anchor bolt.

7. The high-strength hollow grouting anchor assembly according to claim 6, characterized in that: The bolt anchor comprises: a YGM anchor and a clip arranged in the YGM anchor, the clip comprises a first clip and a second clip, and a fan ring gasket is arranged on the inner side of the second clip.

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