CN214035723U - Anchor head embedded bonding anchoring type first anchoring type hollow anchor rod - Google Patents
Anchor head embedded bonding anchoring type first anchoring type hollow anchor rod Download PDFInfo
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- CN214035723U CN214035723U CN202023144825.0U CN202023144825U CN214035723U CN 214035723 U CN214035723 U CN 214035723U CN 202023144825 U CN202023144825 U CN 202023144825U CN 214035723 U CN214035723 U CN 214035723U
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Abstract
The utility model provides an anchor head embedded bonding anchor type cavity stock elder generation to realize the stock and install fast, solve the technological problem of bonding anchor type cavity stock stirring anchor earlier, avoid stock nut and the body of rod to expose the overlength and cause waterproof construction and secondary lining construction quality hidden danger. The hollow anchor rod body is fixedly provided with a connector with a pressure bearing plate and a grout outlet hole structure, the hollow anchor rod body is divided into a front anchoring section from the pressure bearing plate to the front end surface and a rear anchoring section from the pressure bearing plate to the rear end surface, the front end of the front anchoring section is provided with a stirring drill bit on the hollow anchor rod body, and a backing plate and a torsion nut are arranged at the rear end of the rear anchoring section; the backing plate is provided with a rear sleeve which is protruded backwards from the front plate surface, the rear end of the rear sleeve is a limiting ring which is formed by inward radial shrinkage, and the backing plate is sleeved on the rear anchoring section through the limiting ring; the torsion nut is in threaded connection with the rear anchoring section, the main body of the torsion nut is mostly positioned in the rear sleeve, and the limiting ring bears the acting force transmitted by the torsion nut.
Description
Technical Field
The utility model relates to a tunnel and underground works country rock support technical field, especially an embedded bonding anchor type elder generation anchor bolt of anchor head.
Background
The method comprises the following steps of firstly anchoring the hollow anchor rod, completing the structural form of the hollow anchor rod by bonding and anchoring the whole length by two procedures, wherein the procedures comprise the steps of firstly partially anchoring the front end of the hollow anchor rod, then completing the installation of accessories such as a backing plate, a nut and the like, and finally filling and grouting the anchor hole of the part which is not anchored. According to the different anchoring modes of the first anchoring section, the first anchoring type hollow anchor rod can be divided into a mechanical anchoring type and a bonding anchoring type. The bonding anchoring type first-anchoring type hollow anchor rod generally adopts a quick-setting roll type anchoring agent to quickly anchor the anchor rod and the wall of the anchor hole, so that the hollow anchor rod support has a wide application range and comprises various hard rocks and soft rocks.
Because the cost of the resin anchoring agent is far more expensive than that of a cement-based grouting material, through a large amount of engineering practices, the matching relation among the diameters of the anchor rod body, the anchor hole and the resin roll is summarized by the coal roadway resin anchor rod support, so that the advanced, rapid, simple and economic resin anchor rod support technology is met. The coal road resin anchor bolt support generally completes the installation of the backing plate and the nut within 60 seconds, and can apply certain pretightening force. But tunnel anchor rod support requires that the thickness of the bonding anchoring material around the anchor rod is at least 10mm, so that the diameter of an anchor hole of the tunnel anchor rod support is generally larger than that of a coal roadway. In the tunnel anchor rod support, due to the cost consideration, the hollow anchor rod cannot be anchored by using a resin roll in the whole length, so that the bonding anchoring type first-anchoring hollow anchor rod needs to design a first-anchoring section resin anchoring scheme.
One of the key processes of the construction of the bonding anchoring type first-anchoring type hollow anchor rod support is how to send the roll type anchoring agent into the bottom of an anchor hole. At present, three schemes are provided, one of which is that a roll type anchoring agent is put into a special mechanism at the front end of a hollow anchor rod, and the roll type anchoring agent is sent to the bottom of an anchor hole by the hollow anchor rod; secondly, the roll type anchoring agent is manually put into the anchor hole, and the hollow anchor rod pushes the anchoring agent to the bottom of the anchor hole; and thirdly, high-pressure air generated by special equipment is adopted to send the roll-type anchoring agent to the bottom of the anchor hole. Any solution cannot damage the outer package of the anchoring agent during the process of feeding the resin roll anchoring agent into the bottom of the anchoring hole. Once the roll-type anchoring agent is delivered to the bottom of the anchor hole, the exposed end of the hollow anchor rod is pushed and rotated, and the front end mechanism of the anchor rod can crush the roll-type anchoring agent, so that the aim of quick anchoring is fulfilled. The first roll type anchoring agent feeding and crushing anchoring scheme has been specifically solved, but the second and third roll type anchoring agent feeding and crushing anchoring schemes have been still solved.
In the tunnel anchor rod support, the anchor rods at certain surrounding rock sections can be applied after the initial spraying of concrete, and the anchor rods at certain surrounding rock sections can be applied after the completion of the concrete spraying. The anchor head of the anchor rod comprises a backing plate and a nut, and the exposed section of the rod body is the length of the rod body exceeding the nut. The bolt body of the anchor rod is exposed to be too short, which easily causes the sliding of the screw of the nut of the anchor head to lose efficacy, so the proper length of the exposed section of the bolt body of the anchor rod is specified by relevant specifications, and generally 1 time of the diameter of the bolt body can be taken. A large number of exposed nuts and anchor rod bodies on the primary support surface can directly influence the laying of non-woven fabrics and waterproof boards, and are the main reason for causing cavities at the back of the secondary lining. Therefore, the structure of the prior anchor-first hollow anchor rod is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an embedded bonding anchor type cavity stock that bonds of anchor head to realize the stock and install fast, solve the technological problem of the anchor type cavity stock stirring anchor that bonds and bond, avoid stock nut and the body of rod to expose the overlength and cause waterproof construction and secondary lining construction quality hidden danger.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses an embedded anchor formula cavity stock that bonds of anchor head anchor type earlier, including the cavity stock body of rod and setting up backing plate, the torque nut in its rear end, characterized by: the hollow anchor rod body is fixedly provided with a connector with a pressure-bearing plate and a grout outlet hole structure, the hollow anchor rod body is divided into a front anchoring section from the pressure-bearing plate to the front end surface and a rear anchoring section from the pressure-bearing plate to the rear end surface, the front end of the front anchoring section is provided with a stirring drill bit on the hollow anchor rod body, and a backing plate and a torsion nut are arranged at the rear end of the rear anchoring section; the backing plate is provided with a rear sleeve which is protruded backwards from the front plate surface, the rear end of the rear sleeve is a limiting ring which is formed by inward radial shrinkage, and the backing plate is sleeved on the rear anchoring section through the limiting ring; the torsion nut is in threaded connection with the rear anchoring section, the main body of the torsion nut is mostly positioned in the rear sleeve, and the limiting ring bears the acting force transmitted by the torsion nut.
The utility model has the advantages that the rapid installation of the anchor rod is realized, the procedures of inserting, stirring and applying prestress are completed within 3-4 minutes, the rapid anchoring installation of the anchor rod is realized, and a certain prestress is applied; the slurry outlet hole on the wall of the connector cylinder provides a channel for the grouting of cement-based grouting materials into the anchor hole of the rear anchoring section, and the bearing plate can prevent rolled anchoring agents from flowing into the rear anchoring section, and can enable the cement-based grouting materials of the rear anchoring section to bear pressure, so that the bearing capacity of the anchor rod is improved; the embedded backing plate enables the anchor head main body to be mostly arranged in the anchor hole, the exposure of the nut and the rod body is reduced, the hidden danger of laying of non-woven fabrics and waterproof boards is eliminated, the cavity behind the secondary lining is reduced, and the hidden danger of construction quality of a waterproof structure and the secondary lining is avoided.
Drawings
The specification includes the following ten figures:
fig. 1 is a schematic structural view of a bonding anchoring type anchor-first hollow anchor rod embedded in an anchor head of the utility model;
fig. 2 is a schematic view of a spot welding fixing connector for an anchor rod body in an anchor head embedded bonding anchoring type first-anchoring hollow anchor rod of the present invention;
fig. 3 is a front view of an embodiment 1 of the stirring drill bit in the anchor head embedded bonding anchoring type first-anchored hollow anchor rod of the present invention;
fig. 4 is a side view of an embodiment 1 of the stirring drill bit in the anchor head embedded bonding anchoring type first-anchored hollow anchor rod of the present invention;
fig. 5 is a partial cross-sectional view of an embodiment 2 of a stirring drill bit in an anchor head embedded bonding anchoring type anchor-first hollow anchor rod according to the present invention;
fig. 6 is a front view of an embedded backing plate in an anchor head embedded bonding anchoring type first-anchored hollow anchor rod of the present invention;
fig. 7 is a cross-sectional view of the embedded backing plate in the anchor head embedded bonding anchoring type hollow anchor rod of the utility model
Fig. 8 is a front view of a torsion nut in an anchor head embedded bonding anchoring type anchor-first hollow anchor rod of the present invention;
fig. 9 is a side view of a torque nut in an anchor head embedded adhesive anchoring type anchor-first hollow anchor rod of the present invention;
fig. 10 the utility model relates to an anchor head is embedded to bond anchor type anchor earlier in anchor formula cavity stock and is anchored the sketch map.
The figures show the names of the main components and the corresponding labels: the device comprises a front anchoring section 11, a rear anchoring section 12, a connector 20, a grout outlet 21, a pressure bearing plate 22, a middle sleeve 23, welding spots 30, a stirring drill bit 40, a cross 41, a front sleeve 42, a spiral drill bit 43, a backing plate 50, a rear sleeve 51, a limiting ring 52, a front plate surface 53, a torsion nut 60, a top cover 61, an anchoring hole 70, a tunnel wall 80, a rolled anchoring agent anchoring section L1 and a cement-based grouting material anchoring section L2.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the utility model discloses an anchor head embedded bonding anchor type cavity stock earlier, including the cavity stock body of rod and setting up backing plate 50, torque nut 60 at its rear end. The hollow anchor rod body is fixedly provided with a connector 20 with a pressure bearing plate 22 and a grout outlet 21 structure, the hollow anchor rod body is divided into a front anchoring section 11 from the pressure bearing plate 22 to the front end surface and a rear anchoring section 12 from the pressure bearing plate 22 to the rear end surface, the front end of the front anchoring section 11 is provided with a stirring drill bit 40 on the hollow anchor rod body, and a backing plate 50 and a torque nut 60 are installed at the rear end of the rear anchoring section 12. Referring to fig. 6 and 7, the backing plate 50 has a rear sleeve 51 protruding rearward from a front plate surface 53, the rear end of the rear sleeve 51 is provided with a limiting ring 52 formed by radially contracting inward, and the backing plate 50 is sleeved on the rear anchoring section 12 through the limiting ring 52. The torsion nut 60 is in threaded connection with the rear anchoring section 12, the main body of the torsion nut is mostly located in the rear sleeve 51, and the limiting ring 52 bears the acting force transmitted by the torsion nut 60.
Referring to fig. 10, after the anchor hole 70 is formed, the rolled anchoring agent is fed into the anchor hole 70 by manual feeding or high-pressure air of special equipment, then the hollow anchor rod body is inserted to push the rolled anchoring agent to the bottom of the anchor hole 70, then the backing plate 60 is installed in place, the torsion nut 60 is pushed and rotated inwards, the stirring drill bit 40 stirs the outer bag of the rolled anchoring agent, and the rapid anchoring installation of the anchor rod is realized. Waiting for a certain time (such as 3-4 minutes for resin anchoring), rotating the torque nut 60 again, breaking the damping cap by the hollow anchor rod body, and stopping rotating, wherein the anchor rod is applied with a certain prestress (generally 4 tons of force). And then, the grouting pipe is connected with the torque nut 60 or the rear anchoring section 12 to be grouted inwards, and cement-based grouting materials enter the anchoring hole of the rear anchoring section 12 from the grout outlet hole 21 in the cylinder wall of the connector 20, so that the rear anchoring section 12 is bonded and anchored. Because the backing plate 50 is of an embedded structure, most of the main body of the torque nut 60 is positioned in the rear sleeve 51 (in the anchor hole 70), the exposed length of the torque nut 60 and the hollow anchor rod body extending out of the tunnel wall 80 is reduced to the greatest extent, so that the hidden danger of laying non-woven fabrics and waterproof plates is eliminated, the cavity behind the secondary lining is reduced, and the hidden danger of construction quality of a waterproof structure and the secondary lining is avoided.
Referring to fig. 1 and 2, the hollow anchor rod body may adopt an integral structure, that is, the hollow anchor rod body is a full-length threaded pipe, the connector 20 is disposed on the hollow anchor rod body through threaded connection and fixed with the hollow anchor rod body through spot welding 30, and the grout outlet 21 is communicated with the inner cavity of the rear anchoring section 12. The hollow anchor rod body can also adopt a split type assembly structure, namely, the front anchoring section 11 and the rear anchoring section 12 are full-length threaded pipes, the front end of the connector 20 is in threaded connection with the rear end of the front anchoring section 11, the rear portion of the connector 20 is in threaded connection with the front end of the rear anchoring section 12, and the grout outlet 21 is communicated with the inner cavity of the rear anchoring section 12.
Referring to fig. 1 and 2, the upper bearing plate 22 and the middle sleeve 23 of the connector 20 are of an integral structure, the inner wall of the middle sleeve 23 is provided with an internal thread matched with the external thread of the hollow anchor rod body, and the two grout outlet holes 21 are symmetrically arranged on the wall of the middle sleeve 23.
Referring to fig. 3 and 4, the cross-shaped drill 41 and the front sleeve 42 of the stirring drill 40 are integrated, and the front sleeve 42 is fixedly installed at the front end of the front anchoring section 11 through threaded connection. Referring to fig. 5, the mixing bit 40 is composed of a spiral bit 43 and a front sleeve 42, the spiral bit 43 is welded and fixed to the front end of the front sleeve 42, and the front sleeve 42 is fixedly mounted to the front end of the front anchoring section 11 by screwing.
Referring to fig. 8 and 9, the torque nut 60 is a hexagonal nut, the internal thread of the hexagonal nut is matched with the external thread of the hollow anchor rod body, the rear end face of the torque nut 60 is a top cover 61, and the thickness of the nut needs to ensure the long-term working performance requirement. Referring to fig. 10, the inner diameter of the rear sleeve 51 of the backing plate 50 matches the outer diameter of the torque nut 60, and the rear end retainer ring 52 of the rear sleeve 51 receives the force transmitted by the torque nut 60.
The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the claims of the present invention.
Claims (6)
1. The utility model provides an anchor head embedded bonding anchor type cavity stock earlier, includes the cavity stock body of rod and sets up backing plate (50), torsion nut (60) at its rear end, characterized by: the hollow anchor rod body is fixedly provided with a connector (20) with a pressure bearing plate (22) and a grout outlet hole (21) structure, the hollow anchor rod body is divided into a front anchoring section (11) from the pressure bearing plate (22) to the front end surface and a rear anchoring section (12) from the pressure bearing plate (22) to the rear end surface, the front end of the front anchoring section (11) is provided with a stirring drill bit (40) on the hollow anchor rod body, and a backing plate (50) and a torsion nut (60) are installed at the rear end of the rear anchoring section (12); the backing plate (50) is provided with a rear sleeve (51) which is protruded backwards from a front plate surface (53), the rear end of the rear sleeve (51) is a limiting ring (52) which is formed by inward radial shrinkage, and the backing plate (50) is sleeved on the rear anchoring section (12) through the limiting ring (52); the torsion nut (60) is in threaded connection with the rear anchoring section (12), the main body of the torsion nut is mostly positioned in the rear sleeve (51), and the limiting ring (52) bears the acting force transmitted by the torsion nut (60).
2. The anchor head embedded adhesive anchoring type anchor-first hollow anchor rod as claimed in claim 1, wherein: the hollow anchor rod body is a full-length threaded pipe, the connector (20) is arranged on the hollow anchor rod body through threaded connection, the grout outlet hole (21) is communicated with the inner cavity of the rear anchoring section (12), and the connector is fixed with the hollow anchor rod body through spot welding (30).
3. The anchor head embedded adhesive anchoring type anchor-first hollow anchor rod as claimed in claim 1, wherein: the front anchoring section (11) and the rear anchoring section (12) are full-length threaded pipes, the front end of the connector (20) is in threaded connection with the rear end of the front anchoring section (11), the rear portion of the connector (20) is in threaded connection with the front end of the rear anchoring section (12), and the grout outlet hole (21) is communicated with the inner cavity of the rear anchoring section (12).
4. The anchor head embedded adhesive anchoring type anchor-first hollow anchor rod as claimed in claim 2 or 3, wherein: the upper bearing plate (22) of the connector (20) and the middle sleeve (23) are of an integral structure, the inner wall of the middle sleeve (23) is provided with an internal thread matched with the external thread of the hollow anchor rod body, and the two slurry outlet holes (21) are symmetrically arranged on the cylinder wall of the middle sleeve (23).
5. The anchor head embedded adhesive anchoring type anchor-first hollow anchor rod as claimed in claim 2 or 3, wherein: the cross-shaped drill bit (41) on the stirring drill bit (40) and the front sleeve (42) are integrated, and the front sleeve (42) is fixedly installed at the front end of the front anchoring section (11) through threaded connection; or the stirring drill bit (40) is composed of a spiral drill bit (43) and a front sleeve (42), the spiral drill bit (43) is fixedly welded at the front end of the front sleeve (42), and the front sleeve (42) is fixedly installed at the front end of the front anchoring section (11) through threaded connection.
6. The anchor head embedded adhesive anchoring type anchor-first hollow anchor rod as claimed in claim 2 or 3, wherein: the torsion nut (60) is a hexagonal nut, the inner thread of the torsion nut is matched with the outer thread of the hollow anchor rod body, and the rear end face of the torsion nut (60) is a top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144825.0U CN214035723U (en) | 2020-12-24 | 2020-12-24 | Anchor head embedded bonding anchoring type first anchoring type hollow anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144825.0U CN214035723U (en) | 2020-12-24 | 2020-12-24 | Anchor head embedded bonding anchoring type first anchoring type hollow anchor rod |
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| CN214035723U true CN214035723U (en) | 2021-08-24 |
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| CN202023144825.0U Active CN214035723U (en) | 2020-12-24 | 2020-12-24 | Anchor head embedded bonding anchoring type first anchoring type hollow anchor rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109483A (en) * | 2021-11-24 | 2022-03-01 | 天地科技股份有限公司 | Dynamic load rock burst roadway surrounding rock stability control method |
| CN114151117A (en) * | 2021-11-15 | 2022-03-08 | 中国建筑股份有限公司 | Anchor rod assembly |
| CN114294035A (en) * | 2021-12-02 | 2022-04-08 | 中铁隆昌铁路器材有限公司 | Tabletting torque nut type pre-stressed anchor rod and installation method thereof |
-
2020
- 2020-12-24 CN CN202023144825.0U patent/CN214035723U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151117A (en) * | 2021-11-15 | 2022-03-08 | 中国建筑股份有限公司 | Anchor rod assembly |
| CN114109483A (en) * | 2021-11-24 | 2022-03-01 | 天地科技股份有限公司 | Dynamic load rock burst roadway surrounding rock stability control method |
| CN114294035A (en) * | 2021-12-02 | 2022-04-08 | 中铁隆昌铁路器材有限公司 | Tabletting torque nut type pre-stressed anchor rod and installation method thereof |
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