CN219220464U - Novel screw end rod anchorage for bonding end type prestressed anchor rod - Google Patents
Novel screw end rod anchorage for bonding end type prestressed anchor rod Download PDFInfo
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- CN219220464U CN219220464U CN202222917305.1U CN202222917305U CN219220464U CN 219220464 U CN219220464 U CN 219220464U CN 202222917305 U CN202222917305 U CN 202222917305U CN 219220464 U CN219220464 U CN 219220464U
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Abstract
The utility model relates to a novel screw end rod anchor for a bonding end type prestressed anchor rod, and belongs to the technical field of hydraulic, hydroelectric and civil engineering. The novel screw end rod anchor for the bonding end type prestressed anchor rod comprises a nut, a spherical table-shaped gasket, a steel backing plate and an anchor rod body; the middle parts of the nut, the ball table-shaped gasket and the steel backing plate are provided with internal threaded holes which are in matched connection with the anchor rod body, the anchor rod body sequentially penetrates through the steel backing plate, the ball table-shaped gasket and the nut from inside to outside, the small-diameter bottom surface of the ball table-shaped gasket faces the steel backing plate, the steel backing plate is provided with grouting pipe connecting holes and exhaust pipe connecting holes, and the grouting pipe connecting holes and the exhaust pipe connecting holes are communicated with gaps around the anchor rod body and are close to the anchor rod body. The arrangement of the spherical gasket between the nut and the steel backing plate eliminates the influence of the nut on the arrangement of the grouting pipe and the exhaust pipe on the steel backing plate, provides a construction space for grouting, reduces the pre-stress loss caused by the deformation of the nut, and achieves a more efficient tensioning and anchoring effect.
Description
Technical Field
The utility model belongs to the technical field of construction of prestressed anchors for water conservancy and hydropower civil engineering, and particularly relates to a novel screw end rod anchor for a bonded end type prestressed anchor.
Background
In order to avoid unstable and collapse situations under partial extreme conditions after excavation of surrounding rocks of underground caverns and slopes is revealed, supporting and reinforcing are usually needed for broken rock faces. At present, the underground cavern and side slope support mainly comprises support methods such as anchor rods, anchor bar piles, anti-slide piles, gravity retaining walls and the like, and the anchor rod support is used as the most widely applied method in the existing support methods. However, in practice, when the conventional screw end rod anchorage device is used for bonding an anchor rod body, the arrangement of a grouting pipe and an exhaust pipe cannot be close to the anchor rod body due to the influence of the shape and the size of a nut, so that grouting construction is inconvenient, the nut deforms and prestress loss is caused when prestress tensioning is carried out, and the tensioning effect cannot be achieved.
Therefore, it is necessary to provide a novel screw end rod anchor for a bonded end type prestressed anchor rod, which provides a construction space, reduces the pre-stress loss caused by the deformation of a nut, and achieves a more efficient tensioning and anchoring effect.
Disclosure of Invention
In order to solve the problems that in the prior art, when the traditional screw end rod anchor is used for bonding an anchor rod body, the grouting pipe and the exhaust pipe cannot be arranged close to the anchor rod body, grouting construction is inconvenient, and tensioning effect cannot be achieved, the utility model provides a novel screw end rod anchor for bonding an end-type prestressed anchor rod, provides a construction space, reduces pre-stress loss caused by deformation of a nut, and achieves a more efficient tensioning and anchoring effect.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
the utility model provides a novel screw end rod anchor for a bonding end type prestressed anchor rod, which comprises a nut 1, a spherical table-shaped gasket 2, a steel backing plate 3 and an anchor rod body 4; the middle parts of the nut 1, the spherical table-shaped gasket 2 and the steel backing plate 3 are respectively provided with an internal threaded hole 3-1 which is in matched connection with the anchor rod body 4, the anchor rod body 4 sequentially penetrates through the steel backing plate 3, the spherical table-shaped gasket 2 and the nut 1 from inside to outside, the small-diameter bottom surface of the spherical table-shaped gasket 2 faces the steel backing plate 3, the steel backing plate 3 is provided with a grouting pipe connecting hole 3-2 and an exhaust pipe connecting hole 3-3, and the grouting pipe connecting hole 3-2 and the exhaust pipe connecting hole 3-3 are communicated with a gap around the anchor rod body 4 and are close to the anchor rod body 4.
Preferably, the diameter radius of the small diameter bottom surface of the spherical table-shaped gasket 2 is the same as the radius of the anchor rod body 4.
The utility model has the beneficial effects that:
the arrangement of the spherical gasket between the nut and the steel backing plate eliminates the influence of the nut on the arrangement of the grouting pipe and the exhaust pipe on the steel backing plate, provides a construction space for grouting, reduces the pre-stress loss caused by the deformation of the nut, and achieves a more efficient tensioning and anchoring effect.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a detailed cross-sectional view of the present utility model;
FIG. 3 is a graph of the force relationship of a structural steel backing plate and a table washer of the present utility model.
In the figure, a 1-nut, a 2-spherical table-shaped gasket, a 3-steel backing plate, a 4-anchor rod body, a 3-1-internal threaded hole, a 3-2-grouting pipe connecting hole and a 3-3-exhaust pipe connecting hole.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present utility model more apparent, preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding of the skilled person.
As shown in fig. 1-3, the novel screw end rod anchor for the bonded end type prestressed anchor rod comprises a nut 1, a spherical table-shaped gasket 2, a steel backing plate 3 and an anchor rod body 4; the nut 1, the spherical table-shaped gasket 2 and the middle part of the steel backing plate 3 are respectively provided with an internal threaded hole 3-1 which is in matched connection with the anchor rod body 4, the anchor rod body 4 sequentially penetrates through the steel backing plate 3, the spherical table-shaped gasket 2 and the nut 1 from inside to outside, the nut 1 is screwed by a torque wrench to realize prestress tensioning, the small-diameter bottom surface of the spherical table-shaped gasket 2 faces the steel backing plate 3, the steel backing plate 3 is provided with a grouting pipe connecting hole 3-2 and an exhaust pipe connecting hole 3-3, the grouting pipe connecting hole 3-2 and the exhaust pipe connecting hole 3-3 are communicated with a gap around the anchor rod body 4 and are close to the anchor rod body 4, and the hemispherical table-shaped steel gasket 2 arranged between the nut 1 and the steel backing plate 3 can facilitate the arrangement of the grouting pipe connecting hole 3-2 and the exhaust pipe connecting hole 3-3 on the steel backing plate 3, so as to realize grouting reinforcement around the anchor rod body 4.
The diameter radius of the small-diameter bottom surface of the spherical table-shaped gasket 2 is the same as the radius of the anchor rod body 4, so that the grouting pipe connecting hole 3-2 and the exhaust pipe connecting hole 3-3 can be maximally close to the anchor rod body 4, and the spherical table-shaped gasket 2 is an upper bottomThe radius of the surface and the radius of the lower bottom surface are respectively the radius (r 1) of the nut 1 and the radius (r 2) of the anchor rod body 4, and the height is
The ball table of the ball table washer is characterized in that the ball table washer 2 is made of steel, the hardness of the ball table washer is improved through a quenching construction process, the prestress loss caused by small deformation is reduced, and a better prestress effect is achieved.
After grouting of the anchoring section of the prestressed anchor rod is completed and the strength of the grouting body meets the standard requirement, the grouting body is stretched in a grading manner according to the standard requirement by using a torque wrench as a stretching machine, the torque wrench is used for loading the torque step by step, and the nut 1 is screwed step by step to achieve the effect of locking, namely anchoring, of the self-advancing anchor.
The working process of the utility model comprises the following steps:
firstly, preparing construction, measuring and paying off, determining drilling positions according to engineering requirements and specification requirements, drilling holes by a drilling machine, and cleaning the holes; then, inserting the anchor rod body 4, firstly performing grouting at the first stage of the anchoring section, and after the grouting strength of the anchoring section meets the standard requirement, sleeving a steel base plate 3, a spherical table-shaped gasket 2 and a screw cap 3 into the anchor rod body 4 from bottom to top in sequence, wherein the spherical table-shaped gasket 2 is tightly attached to the concave spherical surface; using a torque wrench as a tensioning tool, tensioning in a grading manner according to standard requirements, loading torque step by the torque wrench, screwing the nut 1 step by step, achieving the effect of locking, namely anchoring, of a self-advancing anchor, and measuring prestress loss within 48 hours after tensioning and locking; finally, grouting is carried out on the tensioning section (secondary grouting) through a grouting pipe arranged on the steel backing plate 3, and the grouting pipe and the exhaust pipe are cut off at the orifice after grouting is finished.
The arrangement of the spherical table-shaped gasket 2 between the nut 1 and the steel backing plate 3 eliminates the influence of the nut 1 on the arrangement of the grouting pipe and the exhaust pipe on the steel backing plate 3, provides a construction space for grouting, reduces the pre-stress loss caused by the deformation of the nut 1, and achieves a more efficient tensioning and anchoring effect.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, although the utility model has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.
Claims (2)
1. The utility model provides a novel screw end pole ground tackle for bonding end formula prestressing force stock which characterized in that: the novel screw end rod anchor for the bonding end type prestressed anchor rod comprises a nut (1), a spherical table-shaped gasket (2), a steel backing plate (3) and an anchor rod body (4); the nut (1), the ball table-shaped gasket (2) and the middle part of the steel backing plate (3) are provided with internal thread holes (3-1) which are in matched connection with the anchor rod body (4), the anchor rod body (4) sequentially penetrates through the steel backing plate (3), the ball table-shaped gasket (2) and the nut (1) from inside to outside, the small-diameter bottom surface of the ball table-shaped gasket (2) faces the steel backing plate (3), the steel backing plate (3) is provided with grouting pipe connecting holes (3-2) and exhaust pipe connecting holes (3-3), and the grouting pipe connecting holes (3-2) and the exhaust pipe connecting holes (3-3) are communicated with the surrounding gaps of the anchor rod body (4) and are close to the anchor rod body (4).
2. The novel screw end rod anchor for a bonded end type prestressed anchor rod according to claim 1, wherein: the diameter radius of the small-diameter bottom surface of the spherical table-shaped gasket (2) is the same as the radius of the anchor rod body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222917305.1U CN219220464U (en) | 2022-11-03 | 2022-11-03 | Novel screw end rod anchorage for bonding end type prestressed anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222917305.1U CN219220464U (en) | 2022-11-03 | 2022-11-03 | Novel screw end rod anchorage for bonding end type prestressed anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219220464U true CN219220464U (en) | 2023-06-20 |
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ID=86749034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222917305.1U Active CN219220464U (en) | 2022-11-03 | 2022-11-03 | Novel screw end rod anchorage for bonding end type prestressed anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219220464U (en) |
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2022
- 2022-11-03 CN CN202222917305.1U patent/CN219220464U/en active Active
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