CN222771465U - Novel body-expanding anchor rod - Google Patents
Novel body-expanding anchor rod Download PDFInfo
- Publication number
- CN222771465U CN222771465U CN202421363034.2U CN202421363034U CN222771465U CN 222771465 U CN222771465 U CN 222771465U CN 202421363034 U CN202421363034 U CN 202421363034U CN 222771465 U CN222771465 U CN 222771465U
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- grouting pipe
- sleeve
- end part
- novel
- anchor rod
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Abstract
The utility model provides a novel expansion anchor rod, which comprises a sleeve and a grouting pipe sleeved in the sleeve, wherein the end part of the grouting pipe at the anchoring side of the novel expansion anchor rod is provided with a variable-diameter enlarged end part, the other end of the grouting pipe is provided with external threads, the end part of the grouting pipe provided with the external threads is provided with a rotary handle, the inner side of the rotary handle is provided with internal threads to be matched with the external threads on the grouting pipe, the end part of the sleeve at the anchoring side of the novel expansion anchor rod is provided with a plurality of pointed ends, and the free ends of the pointed ends at least do not exceed the variable-diameter enlarged end part of the grouting pipe in an initial state. Through improvement stock anchor end structure, improve the anchoring effect, do not need to enlarge drilling aperture or increase drilling degree of depth and reach required anchor power, reduce the construction degree of difficulty, reduce the cost, easy and simple to handle simultaneously, easily promote, can change the shape and the length of sleeve incision (pointed end) in a flexible way according to the country rock geological conditions, satisfy the needs of different constructions.
Description
Technical Field
The utility model relates to the field of engineering construction, in particular to a novel body-expanding anchor rod.
Background
The anchor rod is one of the most basic components of the tunnel and foundation pit support, and is widely applied to engineering construction to strengthen side slopes, tunnels and dam bodies. The anchor bolt support is used as an active support, so that the proper deformation of surrounding rock is allowed, the bearing capacity of the rock mass is improved, and the stability of the surrounding rock is fully exerted.
The whole anchor rod is divided into a free section and an anchoring section. The anchoring force has decisive effect on the bearing of the anchor rod, and the size of the anchoring force depends on the combination state of the anchoring section and the surrounding rock-soil body, including the size, shape and rock-soil body property of the surface area of the anchoring section, the binding force and friction resistance between the anchoring section and the surrounding rock-soil body. For a particular surrounding rock, the designed anchoring force is typically obtained by adjusting the size of the surface area of the anchoring section, the length of the anchoring section or the shape of the anchoring section. In practical construction, a longer anchoring section or a larger aperture is often required to obtain the required anchoring force, however, the hole is difficult to form in weak and broken stratum by enlarging the aperture or increasing the depth of the drilled hole, and the hole is extremely easy to collapse. The grouting time and the grouting amount are difficult to control. This not only increases the cost but also increases the difficulty of construction, limiting the application of the anchor rod.
Disclosure of utility model
The utility model mainly aims to provide a novel expansion anchor rod, which is expected to effectively solve the problems in the background technology.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A novel expansion anchor rod is characterized by comprising a sleeve and a grouting pipe sleeved in the sleeve, wherein the grouting pipe is provided with a reducing expansion end part at the end part of one anchoring side of the novel expansion anchor rod, the other end of the grouting pipe is provided with external threads, the end part of the grouting pipe provided with the external threads is provided with a rotary handle, the inner side of the rotary handle is provided with internal threads to be matched with the external threads of the grouting pipe, the end part of the sleeve at the anchoring side of the novel expansion anchor rod is provided with a plurality of pointed ends, and the free ends of the pointed ends at least do not exceed the reducing expansion end part of the grouting pipe in an initial state.
The utility model can also adopt or combine the following technical proposal when adopting the technical proposal:
As a preferable technical scheme of the utility model, the diameter-changing enlarged end part is a wedge-shaped bolt, and the joint of the wedge-shaped bolt and the grouting pipe is wedge-shaped.
As a preferable technical scheme of the utility model, the diameter-variable enlarged end part is of a hollow structure.
As a preferable technical scheme of the utility model, the diameter-variable enlarged end part is made of high-strength carbon steel.
As a preferable technical scheme of the utility model, a plurality of grouting holes are arranged on the side wall of the grouting pipe.
As a preferable technical scheme of the utility model, the plurality of grouting holes are arranged in a quincunx shape.
As a preferable technical scheme of the utility model, a gasket is arranged between the rotary handle and the sleeve.
As a preferable technical scheme of the utility model, the diameter of the sleeve is 25mm, the length of the sleeve is 4m, and the diameter of the grouting pipe is 18mm, and the length of the grouting pipe is 4.2m.
As a preferable technical scheme of the utility model, the sleeve is a seamless steel pipe, and the grouting pipe is a seamless steel pipe.
The utility model provides a novel expansion anchor rod, which has the advantages that the variable diameter expansion end part of a grouting pipe at an anchoring end is pulled into a sleeve by rotating a rotary handle, so that the sleeve is expanded, the friction bond between the outer side wall of the sleeve and a rock-soil body is enhanced, meanwhile, the tip end of the end part of the sleeve can be inserted into the rock-soil body, the anchoring effect of the anchor rod and the rock-soil body is further improved, the anchoring length required by the anchor rod design is reduced, the drilling hole diameter is not required to be enlarged or the drilling depth is not required to be increased to achieve the required anchoring force, the construction difficulty is reduced, the manufacturing cost is reduced, the operation is simple and convenient, the popularization is easy, the shape and the length of a sleeve notch (tip end) can be flexibly changed according to surrounding rock geological conditions, and the requirements of different constructions are met.
Drawings
FIG. 1 is a cross-sectional view of a novel expanded anchor provided by the present utility model;
FIG. 2 is a partial cross-sectional view of a sleeve with a tip;
FIG. 3 is a schematic view of the sleeve tip when open;
FIG. 4 is a top view;
In the figure, 1-sleeve, 2-grouting pipe, 3-rotary handle, 4-gasket, 11-tip, 21-grouting hole and 22-reducing enlarged end.
Detailed Description
The utility model will be described in further detail with reference to the drawings and specific embodiments.
As shown in figures 1-4, the novel expanding anchor comprises a sleeve 1 and a grouting pipe 2 sleeved in the sleeve 1, wherein the end part of the grouting pipe 2 on the anchoring side of the novel expanding anchor is provided with a variable diameter expansion end part 22, the other end of the grouting pipe 2 is provided with external threads, the grouting pipe 2 is provided with a rotary handle 3 on the end part with the external threads, the inner side of the rotary handle 3 is provided with internal threads to be matched with the external threads on the grouting pipe 2, the end part of the sleeve 1 on the anchoring side of the novel expanding anchor is provided with a plurality of tips 11 (in the embodiment, a plurality of cuts are formed on the anchoring end of the sleeve 1, the cuts form the tips, and in other embodiments, a plurality of tips 11 can be directly arranged on the side wall of the anchoring end of the sleeve 1), and the free end of the tip 11 does not exceed the variable diameter expansion end part 22 of the grouting pipe 2 at least in the initial state.
The diameter-variable enlarged end 22 is a wedge bolt, and the junction between the wedge bolt and the grouting pipe 2 is wedge-shaped.
The diameter-variable enlarged end 22 is hollow.
The enlarged diameter end 22 is high strength carbon steel.
A plurality of grouting holes 21 are arranged on the side wall of the grouting pipe 2.
The plurality of grouting holes 21 are arranged in a quincunx shape.
A gasket 4 is arranged between the rotary handle 3 and the sleeve 1.
The diameter of the sleeve 1 is 25mm and the length is 4m, and the diameter of the grouting pipe 2 is 18mm and the length is 4.2m.
The sleeve 1 is a seamless steel pipe, and the grouting pipe 2 is a seamless steel pipe.
Specifically, the novel expansion anchor rod is implemented in the following manner:
Drilling holes according to the designed aperture and depth, flushing the drilled holes by high-pressure air or high-pressure water, placing the expanded anchor rod into the drilled holes, rotating the rotary handle 3, applying force to the rotary handle 3 in the anchoring direction during rotation to enable the rotary handle 3 and the sleeve 1 to be relatively fixed, screwing the grouting pipe 2 out to drive the bottom variable-diameter expanded end 22 into the sleeve 1, expanding the sleeve 1, inserting the tip 11 of the sleeve 1 into a rock-soil body, pressing and pouring prepared cement slurry into the grouting pipe 2 by a slurry pump to perform grouting, and injecting the slurry into the rock-soil body through the bolt and the notch on the sleeve 1 after the slurry flows into the rod body from the grouting hole 21, so that the expanded anchor rod and the surrounding rock-soil body form an integral structure after final setting. Grouting can improve the mechanical properties of the anchoring body and the deep surrounding rock, improve the integrity of the surrounding rock, and simultaneously improve the anchoring effect of the anchor rod by improving the mechanical properties of the anchoring body.
The above detailed description is intended to illustrate the present utility model by way of example only and not to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the precise embodiments disclosed, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. The novel body-expanding anchor rod is characterized by comprising a sleeve (1) and a grouting pipe (2) sleeved in the sleeve (1);
The grouting pipe (2) is provided with a reducing and expanding end part (22) at the end part of the anchoring side of the novel expanding anchor rod, and the other end of the grouting pipe (2) is provided with external threads;
The grouting pipe (2) is provided with a rotary handle (3) at the end part with external threads, and the inner side of the rotary handle (3) is provided with internal threads to be matched with the external threads on the grouting pipe (2);
The sleeve (1) is provided with a plurality of tips (11) at the end part of the anchoring side of the novel expanding anchor rod, and in an initial state, the free ends of the tips (11) at least do not exceed the reducing expansion end part (22) of the grouting pipe (2).
2. The novel expanded anchor as claimed in claim 1, wherein the diameter-variable expanded end portion (22) is a wedge-shaped bolt, and the junction between the wedge-shaped bolt and the grouting pipe (2) is wedge-shaped.
3. A novel expanded anchor according to claim 1 or 2, characterized in that the diameter-variable enlarged end portion (22) is of hollow construction.
4. The novel expanded anchor as claimed in claim 1, wherein the enlarged diameter end portion (22) is high strength carbon steel.
5. A novel expanded anchor according to claim 1, characterized in that a plurality of grouting holes (21) are formed in the side wall of the grouting pipe (2).
6. A novel expanded anchor according to claim 1, characterized in that the plurality of grouting holes (21) are arranged in a quincuncial shape.
7. The novel expanded anchor as claimed in claim 1, wherein a spacer (4) is arranged between the rotary handle (3) and the sleeve (1).
8. The novel expanded anchor as claimed in claim 1, wherein the sleeve (1) has a diameter of 25mm and a length of 4m, and the grouting pipe (2) has a diameter of 18mm and a length of 4.2m.
9. A novel expanded anchor according to claim 1 or 8, characterized in that the sleeve (1) is a seamless steel tube and the grouting pipe (2) is a seamless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421363034.2U CN222771465U (en) | 2024-06-14 | 2024-06-14 | Novel body-expanding anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421363034.2U CN222771465U (en) | 2024-06-14 | 2024-06-14 | Novel body-expanding anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222771465U true CN222771465U (en) | 2025-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421363034.2U Active CN222771465U (en) | 2024-06-14 | 2024-06-14 | Novel body-expanding anchor rod |
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| Country | Link |
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| CN (1) | CN222771465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118704454A (en) * | 2024-06-14 | 2024-09-27 | 中国电建集团华东勘测设计研究院有限公司 | A new type of expanded anchor |
-
2024
- 2024-06-14 CN CN202421363034.2U patent/CN222771465U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118704454A (en) * | 2024-06-14 | 2024-09-27 | 中国电建集团华东勘测设计研究院有限公司 | A new type of expanded anchor |
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