CN219953401U - Tunnel mortar anchor rod with packer and anchoring structure thereof - Google Patents
Tunnel mortar anchor rod with packer and anchoring structure thereof Download PDFInfo
- Publication number
- CN219953401U CN219953401U CN202320628636.5U CN202320628636U CN219953401U CN 219953401 U CN219953401 U CN 219953401U CN 202320628636 U CN202320628636 U CN 202320628636U CN 219953401 U CN219953401 U CN 219953401U
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- Prior art keywords
- air bag
- grouting
- packer
- mortar
- pipe
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 70
- 238000004873 anchoring Methods 0.000 title claims abstract description 43
- 230000008093 supporting effect Effects 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011435 rock Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a tunnel mortar anchor rod with a packer and an anchoring structure thereof. According to the utility model, the packer is matched with the mortar anchor rod, so that the anchoring effect of the tunnel mortar anchor rod is further improved, the packer can be repeatedly used, and the popularization is strong.
Description
[ field of technology ]
The utility model relates to the field of tunnel supporting engineering, in particular to a tunnel mortar anchor rod with a packer and an anchoring structure thereof.
[ background Art ]
The supporting anchor rod is an important component of a tunnel surrounding rock anchoring supporting structure, the common supporting anchor rod is of the types of a mortar anchor rod, a hollow anchor rod and the like, the mortar anchor rod is used for quickly inserting the anchor rod into an anchor hole after mortar is poured into the anchor hole, and the hollow anchor rod is used for carrying out pressure grouting through the hollow anchor rod after the anchor rod structure is installed; the anchoring structure formed by the two anchor rods has low bonding degree between the anchoring mortar and surrounding rock around the anchor hole, and the bonding degree between the anchoring mortar and surrounding rock around the anchor hole is improved to a certain extent by pressure grouting adopted in the construction grouting of the hollow anchor rod, but the grouting pressure is generally between 0.5MPa and 1MPa, so that the grouting pressure is not large enough, the bonding degree is limited, and the price of the hollow anchor rod relative to the mortar anchor rod is relatively higher.
In the foreign tunnel engineering project, in order to improve the bonding strength of an anchor bolt supporting system and surrounding rocks around an anchor hole, repair surrounding rock cracks around the anchor hole, when a mortar anchor rod is constructed, grouting is carried out by combining a packer, the packer is of an air bag structure, the anchor hole can be plugged, so that pressure grouting is carried out on a sealed section, the pressure grouting can be carried out according to the condition and construction requirements of the surrounding rocks, grouting pressure is adjusted by adjusting the plugging effect of the packer, the grouting pressure can reach more than 5MPa, the anchoring system can be well combined with the surrounding rocks tightly, the surrounding rock cracks are repaired, the anchoring effect and the stability of the surrounding rocks are further improved, but the packer is matched with the construction of the mortar anchor rod, the anchor hole is required to be subjected to pressure grouting section by section, the anchor rod is implanted after the completion of the grouting of the anchor hole, the construction efficiency is low, and the implementation effect is weakened due to the fact that the grouting is carried out firstly and then the surrounding rock is planted.
[ utility model ]
The utility model aims to provide a tunnel mortar anchor rod with a packer and an anchoring structure thereof, wherein the packer structure is combined with the mortar anchor rod to realize an anchoring process of firstly planting the rod and then grouting section by section, so that the construction efficiency is effectively improved, the anchoring effect is improved, and the construction cost is lower.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
the tunnel mortar anchor rod with the packer comprises a mortar anchor rod, the packer, an anchor hole and anchoring mortar, wherein the packer is arranged on the mortar anchor rod, and the anchoring mortar is filled in the anchor hole through the packer;
the mortar anchor rod body is of a threaded structure;
the packer is characterized by comprising a front-end air bag, a rear-end air bag, a connecting ring, an air bag supporting frame, a vibrator, vibrating steel wires, a grouting pipe and a grouting movable pipe, wherein the air bag supporting frame is arranged in the front-end air bag and the rear-end air bag, the front-end air bag is connected with the rear-end air bag through the connecting ring, the vibrator is arranged at the end part of the front-end air bag, far away from an anchor hole orifice, the vibrating steel wires are connected onto the vibrator, and the grouting pipe and the grouting movable pipe sequentially penetrate through the rear-end air bag, the front-end air bag and the vibrator and are communicated with an anchor hole space of the packer.
According to further improvement, the front-end air bag and the rear-end air bag are made of rubber with the same thickness, are of hollow cylindrical structures, the outer diameter of the front-end air bag and the diameter of the anchor hole are consistent, the length of the front-end air bag and the rear-end air bag after inflation is 30 cm-35 cm, and threaded protruding blocks matched with the mortar anchor rod body are arranged on the inner sides of the front-end air bag and the rear-end air bag.
Further improvement, the gasbag support frame is the spring structure that adopts the diameter to be 2mm ~ 3mm steel wire to make, and both ends are equipped with restriction end plate, restriction end plate and front end gasbag, rear end gasbag both ends end laminating are fixed for restriction front end gasbag, rear end gasbag are the anchor eye pore wall when inflating, can closely build in on the anchor eye after guaranteeing front end gasbag, rear end gasbag to inflate, and the external diameter of gasbag support frame and front end gasbag thickness sum be the anchor eye aperture.
Further improvement, the connecting ring is a contractible and foldable folding ring, and the extension length of the connecting ring is 1.5 m-2.5 m.
Further improvement, the outer side of the pipe wall of the grouting pipe is attached and fixed with the front-end air bag, is attached and not fixed with the rear-end air bag, and can freely stretch and retract at the rear-end air bag.
Further improvement, the movable grout outlet pipe consists of a movable pipe and a grout outlet pipe, wherein the movable pipe is a folding telescopic pipe, the movable pipe is connected with a front-end air bag and a rear-end air bag, and the grout outlet pipe is connected with the movable pipe.
Further improvement, the pipe diameters of the grouting pipe and the grouting movable pipe are 0.2 cm-0.25 cm, when the direction of the anchor hole opening is upward, in order to prevent the anchoring mortar from flowing out of the grouting movable pipe during grouting, the end part of the grouting pipe, which is far away from the anchor hole opening, is flush with the surface of the vibrator, and the end part of the grouting movable pipe, which is far away from the anchor hole opening, is close to the bottom of the hole opening; when the anchor hole opening direction is downward, in order to avoid the outflow of the anchoring mortar from the grouting movable pipe during grouting, the end part of the grouting pipe, which is far away from the anchor hole opening direction, is close to the anchor hole bottom, and the end part of the grouting movable pipe, which is far away from the anchor hole opening direction, is flush with the surface of the vibrator.
The utility model has the technical effects that:
(1) The anchoring effect is good: the packer is matched with the mortar anchor rod to anchor, so that grouting pressure of the mortar anchor rod is increased, anchoring mortar is better extruded into cracks on the wall of the anchor hole and surrounding rocks under high pressure, bonding strength between a mortar anchor rod supporting system and the surrounding rocks of the tunnel is further enhanced, the anchoring supporting effect is greatly improved, and the safety of the tunnel structure is improved.
(2) The packer can be repeatedly used, and is low in cost and strong in popularization: the packer can freely move on the mortar anchor rod through inflation and deflation, can be recycled after mortar grouting is completed, and is matched with the mortar anchor rod for grouting, so that the construction speed is high, the construction difficulty is low, and the popularization is strong.
[ description of the drawings ]
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic view of a tunnel mortar anchor rod with a packer and an anchoring structure thereof;
FIG. 2 is a schematic view of the appearance of a packer of the present utility model;
FIG. 3 is a cross-sectional view of a packer of the utility model;
wherein, 1 is the mortar anchor rod, 2 is the packer, 21 is the front end gasbag, 211 is the screw thread lug, 22 is the rear end gasbag, 23 is the go-between, 24 is the gasbag support frame, 241 is the end plate, 25 is the vibrator, 26 is the vibrating wire, 27 is the slip casting pipe, 28 is the play thick liquid movable pipe, 281 is movable pipe, 282 is play thick liquid pipe, 3 is the anchor eye, 4 is anchor mortar.
[ detailed description ] of the utility model
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
1-3, the utility model provides a tunnel mortar anchor rod with a packer and an anchoring structure thereof, wherein the tunnel mortar anchor rod comprises a mortar anchor rod, a packer, an anchor hole and anchoring mortar, the packer is arranged on the mortar anchor rod, and the anchoring mortar is filled in the anchor hole through the packer; the mortar anchor rod body is of a threaded structure; the packer is characterized by comprising a front-end air bag, a rear-end air bag, a connecting ring, an air bag supporting frame, a vibrator, vibrating steel wires, a grouting pipe and a grouting movable pipe, wherein the air bag supporting frame is arranged in the front-end air bag and the rear-end air bag, the front-end air bag is connected with the rear-end air bag through the connecting ring, the vibrator is arranged at the end part of the front-end air bag, far away from an anchor hole orifice, the vibrating steel wires are connected onto the vibrator, and the grouting pipe and the grouting movable pipe sequentially penetrate through the rear-end air bag, the front-end air bag and the vibrator and are communicated with an anchor hole space of the packer.
In this embodiment, as shown in fig. 2, the front end air bag and the rear end air bag are made of rubber with the same thickness, and are hollow cylindrical structures, the outer diameter of the hollow cylindrical structures is consistent with the aperture of the anchor hole, the length of the hollow cylindrical structures after inflation is 30 cm-35 cm, and threaded protruding blocks matched with the mortar anchor rod body are arranged on the inner sides of the hollow cylindrical structures.
In this embodiment, as shown in fig. 3, the air bag supporting frame is of a spring structure made of steel wires with diameters of 2 mm-3 mm, two ends of the air bag supporting frame are provided with limiting end plates, the limiting end plates are attached and fixed to two ends of the front air bag and the rear air bag, and are used for limiting the expansion directions of the front air bag and the rear air bag to be anchor hole walls when the front air bag and the rear air bag are inflated, so that the front air bag and the rear air bag can be tightly embedded in anchor holes after being inflated, and the sum of the outer diameter of the air bag supporting frame and the thickness of the front air bag is the anchor hole diameter.
In this embodiment, as shown in fig. 3, the connection ring is a collapsible folding ring, and the extension length of the connection ring is 1.5 m-2.5 m.
In this embodiment, as shown in fig. 3, the outer side of the pipe wall of the grouting pipe is attached to the front end air bag, and is not attached to the rear end air bag, so that the grouting pipe can freely stretch and retract in the rear end air bag.
As shown in fig. 1 and 3, in this embodiment, the outer side of the grouting pipe wall is attached to the front end air bag and fixed, and attached to the rear end air bag and not fixed, so that the grouting pipe can freely extend and retract in the rear end air bag.
In this embodiment, as shown in fig. 1, the pipe diameters of the grouting pipe and the movable grouting pipe are 0.2 cm-0.25 cm, when the direction of the anchor hole opening is upward, in order to avoid the outflow of the anchoring mortar from the movable grouting pipe during grouting, the end of the grouting pipe away from the direction of the anchor hole opening is flush with the surface of the vibrator, and the end of the movable grouting pipe away from the direction of the anchor hole opening is close to the bottom of the hole opening.
A tunnel mortar anchor rod with a packer and an anchoring structure thereof, wherein the working principle of the packer is as follows:
when the packer works, the front-end air bag is inflated firstly, the front-end air bag is tightly attached and fixed on the wall of the anchor hole, then grouting is carried out to the packing section through the grouting pipe, after grout overflows from the grouting movable pipe, pressure is stabilized for 5-10 minutes, the rear-end air bag is inflated, the rear-end air bag is tightly attached and fixed on the wall of the anchor hole, partial gas of the front-end air bag is discharged, the front-end air bag can move on a mortar anchor rod, then grouting is carried out continuously through the grouting pipe slowly, the front-end air bag gradually moves towards the rear-end air bag under continuous filling of anchoring mortar, the position of the front-end air bag is estimated through collecting grouting amount, when the front-end air bag is close to the rear-end air bag, the front-end air bag is inflated again, the rear-end air bag partial gas is unloaded, the grouting movable pipe is dragged, the rear-end air bag is moved to the next packing section, and the anchor hole is filled with the anchoring mortar after being reciprocated.
The utility model has the beneficial effects that:
(1) The anchoring effect is good: the packer is matched with the mortar anchor rod to anchor, so that grouting pressure of the mortar anchor rod is increased, anchoring mortar is better extruded into cracks on the wall of the anchor hole and surrounding rocks under high pressure, bonding strength between a mortar anchor rod supporting system and the surrounding rocks of the tunnel is further enhanced, the anchoring supporting effect is greatly improved, and the safety of the tunnel structure is improved.
(2) The packer can be repeatedly used, and is low in cost and strong in popularization: the packer can freely move on the mortar anchor rod through inflation and deflation, can be recycled after mortar grouting is completed, and is matched with the mortar anchor rod for grouting, so that the construction speed is high, the construction difficulty is low, and the popularization is strong.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. The tunnel mortar anchor rod with the packer and the anchoring structure thereof are characterized by comprising the mortar anchor rod (1), the packer (2), an anchor hole (3) and anchoring mortar (4), wherein the packer (2) is arranged on the mortar anchor rod (1), and the anchoring mortar (4) is filled in the anchor hole (3) through the packer (2);
the rod body of the mortar anchor rod (1) is of a threaded structure;
the packer (2) is formed by a front-end air bag (21), a rear-end air bag (22), a connecting ring (23), an air bag supporting frame (24), a vibrator (25), a vibrating wire (26), a grouting pipe (27) and a grouting movable pipe (28), the air bag supporting frame (24) is arranged in the front-end air bag (21) and the rear-end air bag (22), the front-end air bag (21) is connected with the rear-end air bag (22) through the connecting ring (23), the vibrator (25) is arranged at the end part, far away from an orifice of an anchor hole (3), of the front-end air bag (21), the vibrating wire (26) is connected onto the vibrator (25), and the grouting pipe (27) and the grouting movable pipe (28) sequentially penetrate through the rear-end air bag (22), the front-end air bag (21) and the vibrator (25) to be communicated with the space of the anchor hole (3) blocked by the packer (2).
2. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the front end air bag (21) and the rear end air bag (22) are made of rubber with the same thickness, are hollow cylindrical structures, the outer diameter of the hollow cylindrical structures is consistent with the aperture of the anchor hole (3), the length of the hollow cylindrical structures after inflation is 30 cm-35 cm, and threaded protruding blocks (211) matched with the rod body of the mortar anchor rod (1) are arranged on the inner sides of the hollow cylindrical structures.
3. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the air bag supporting frame (24) is of a spring structure made of steel wires with the diameter of 2 mm-3 mm, limiting end plates (241) are arranged at two ends, the limiting end plates (241) are attached and fixed with two ends of the front air bag (21) and the rear air bag (22) and are used for limiting the expansion direction of the front air bag (21) and the rear air bag (22) to be the wall of an anchor hole (3) when the front air bag (21) and the rear air bag (22) are inflated so as to ensure that the front air bag (21) and the rear air bag (22) can be tightly embedded and fixed on the anchor hole (3), and the sum of the outer diameter of the air bag supporting frame (24) and the thickness of the front air bag (21) is the aperture of the anchor hole (3).
4. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the connecting ring (23) is a contractible and foldable folding ring, and the extension length of the connecting ring (23) is 1.5 m-2.5 m.
5. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the outer side of the pipe wall of the grouting pipe (27) is fixedly attached to the front-end air bag (21), is not fixedly attached to the rear-end air bag (22), and can freely stretch and retract in the rear-end air bag (22).
6. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the grout outlet movable pipe (28) is composed of a movable pipe (281) and a grout outlet pipe (282), the movable pipe (281) is a folding telescopic pipe, the movable pipe (281) is connected with a front-end air bag (21) and a rear-end air bag (22), and the grout outlet pipe (282) is connected with the movable pipe (281).
7. The tunnel mortar anchor rod with the packer and the anchoring structure thereof according to claim 1, wherein the pipe diameters of the grouting pipe (27) and the grouting movable pipe (28) are 0.2 cm-0.25 cm, when the hole opening direction of the anchor hole (3) is upward, in order to prevent the anchoring mortar (4) from flowing out of the grouting movable pipe (28) during grouting, the end part of the grouting pipe (27) away from the hole opening direction of the anchor hole (3) is flush with the surface of the vibrator (25), and the end part of the grouting movable pipe (28) away from the hole opening direction of the anchor hole (3) is close to the hole bottom of the hole opening; when the hole opening direction of the anchor hole (3) is downward, in order to prevent the anchoring mortar (4) from flowing out from the grouting movable pipe (28) during grouting, the end part of the grouting pipe (27) away from the hole opening direction of the anchor hole (3) is close to the hole bottom of the anchor hole (3), and the end part of the grouting movable pipe (28) away from the hole opening direction of the anchor hole (3) is flush with the surface of the vibrator (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628636.5U CN219953401U (en) | 2023-03-27 | 2023-03-27 | Tunnel mortar anchor rod with packer and anchoring structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320628636.5U CN219953401U (en) | 2023-03-27 | 2023-03-27 | Tunnel mortar anchor rod with packer and anchoring structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219953401U true CN219953401U (en) | 2023-11-03 |
Family
ID=88552768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320628636.5U Active CN219953401U (en) | 2023-03-27 | 2023-03-27 | Tunnel mortar anchor rod with packer and anchoring structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219953401U (en) |
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2023
- 2023-03-27 CN CN202320628636.5U patent/CN219953401U/en active Active
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