CN216999690U - Prefabricated formula prestressing force anti-floating anchor rod - Google Patents
Prefabricated formula prestressing force anti-floating anchor rod Download PDFInfo
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- CN216999690U CN216999690U CN202122369104.8U CN202122369104U CN216999690U CN 216999690 U CN216999690 U CN 216999690U CN 202122369104 U CN202122369104 U CN 202122369104U CN 216999690 U CN216999690 U CN 216999690U
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Abstract
The utility model belongs to the technical field of anti-floating anchor rods, and discloses a prefabricated prestressed anti-floating anchor rod, which aims to solve the problem that the anti-floating anchor rod is poor in integrity and easy to crack. The steel strand fixing device comprises at least three steel strands, wherein the at least three steel strands are connected together through mutually spaced erection rings and fastening rings, the erection rings are sleeved inside the at least three steel strands, the fastening rings are sleeved outside the at least three steel strands, and the outer diameter of each erection ring is larger than the inner diameter of each fastening ring; the concrete anchor is characterized in that the at least three steel strands are arranged in a concrete layer in advance, one ends of the at least three steel strands extend out of the concrete layer, the outer diameter of the concrete layer is smaller than the inner diameter of the anchor hole, so that a gap for pouring concrete or mortar is formed between the concrete layer and the anchor hole, a grouting pipe is also embedded in the concrete layer, and two ends of the grouting pipe respectively extend out of the concrete layer.
Description
Technical Field
The utility model belongs to the technical field of anti-floating anchor rods, and particularly relates to a prefabricated prestressed anti-floating anchor rod.
Background
The anti-floating anchor rod is one kind of underground structure anti-floating measure in building engineering, and is one structural member set to resist the upward displacement of the building.
The anchor rod body of anti-floating anchor rod generally adopts steel strand wires or steel strand wires to come as the anchor rod body, but because the steel strand wires external diameter is less when using steel strand wires to construct anti-floating anchor rod to make the steel strand wires and concrete or the mortar wholeness of pouring in the anchor eye poor, the condition of fracture appears easily in the concrete or the mortar of pouring when exerting prestressing force to the steel strand wires.
Meanwhile, the steel strands in the prior art are generally arranged in parallel with the anchor holes, so that the contact area between the steel strands and concrete or mortar poured into the concrete is further small, and the durability of the anti-floating anchor rod is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a prefabricated prestressed anti-floating anchor rod in order to solve the problem that the anti-floating anchor rod is poor in integrity and prone to cracking, the durability and the stability of the anti-floating anchor rod can be improved, and the problem that the existing anti-floating anchor rod is prone to cracking is solved.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows:
a prefabricated prestressed anti-floating anchor rod comprises at least three steel strands extending into an anchor hole, and is characterized in that the at least three steel strands are connected together through erection rings and fastening rings which are arranged at intervals, the erection rings are sleeved inside the at least three steel strands, the fastening rings are sleeved outside the at least three steel strands, and the outer diameter of each erection ring is larger than the inner diameter of each fastening ring, so that the radius of a circumscribed circle formed by the at least three steel strands can be changed along the length direction of the steel strands; the concrete anchor is characterized in that the at least three steel strands are arranged in a concrete layer in advance, one ends of the at least three steel strands extend out of the concrete layer, the outer diameter of the concrete layer is smaller than the inner diameter of the anchor hole, so that a gap for pouring concrete or mortar is formed between the concrete layer and the anchor hole, a grouting pipe is also embedded in the concrete layer, and two ends of the grouting pipe respectively extend out of the concrete layer.
In some embodiments, the concrete layer is sequentially divided into an upper concrete layer, a middle concrete layer and a lower concrete layer along the length direction of the at least three steel strands, and the peripheries of the middle concrete layer and the lower concrete layer are provided with grooves or ridges for increasing the contact area with the injected concrete or mortar.
In some embodiments, the steel strand in the upper concrete layer is connected with a spiral rib at the periphery.
In some embodiments, the standing ring and the fastening ring are disposed on steel strands in the middle and lower concrete layers.
Compared with the prior art, the utility model has the following beneficial effects:
according to the prefabricated prestressed anti-floating anchor rod, at least three steel strands are embedded in a concrete layer, so that the structure of the anchor rod body is changed into the steel strands, the erection ring, the fastening ring, the grouting pipe and the concrete layer, the contact between the steel strands in the existing anchor hole and concrete or mortar poured into the anchor hole is changed into the contact between the concrete layer and the concrete or mortar poured into the anchor hole, on one hand, the integrity between the anchor rod body and the concrete or mortar poured into the anchor hole is improved through size increase, and on the other hand, compared with the situation that the steel strands are directly utilized to pour the concrete or mortar into the anchor hole, the concrete or mortar poured into the anchor hole has better viscosity and integrity between the concrete layer and the concrete or mortar; thereby improve anti-floating anchor rod's wholeness, durability and reliability, prevent that anti-floating anchor rod from appearing the cracked problem.
Meanwhile, compared with the anchor rod body (steel strand) in the prior art, the anchor rod body formed by the steel strand, the vertical frame ring, the fastening ring, the grouting pipe and the concrete layer is higher in strength, so that the anchor rod body can be conveniently implanted into the anchor hole, and the difficulty of implanting into the anchor hole is reduced.
According to the prefabricated prestressed anti-floating anchor rod, at least three steel strands are connected together through the erection ring and the fastening ring, the diameters of the erection ring and the fastening ring are different, so that the radius of a circumscribed circle formed by the steel strands can be changed along the length direction of the steel strands, the contact area between the steel strands and a concrete layer can be increased, the steel strands and the concrete layer can form an organic whole, when prestress is applied, the steel strands and the concrete layer are stressed together, and the prestress applied by the anti-floating anchor rod can be increased. Compared with the prior art, the method has the advantages that the depth of the anchor hole can be reduced by increasing the depth of the anchor hole, so that the construction cost of the anti-floating anchor rod is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the anchoring body (steel strand, erection ring, fastening ring, grouting pipe and concrete layer) of the present invention;
FIG. 2 is a schematic structural view of the present invention;
the mark in the figure is: 1. the concrete grouting structure comprises steel strands 21, a standing ring 22, a fastening ring 3, a concrete layer 4, a grouting pipe 5, a groove or convex edge 6, an anchor hole 7, concrete or mortar 8 and a spiral rib.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Other embodiments used by those skilled in the art can be obtained without any creative effort based on the embodiments in the present invention, and all of them belong to the protection scope of the present invention.
With reference to the attached drawings, the prefabricated prestressed anti-floating anchor rod comprises at least three steel strands 1 extending into an anchor hole 6, the at least three steel strands 3 are connected together through erection rings 21 and fastening rings 22 which are arranged at intervals, the erection rings 21 are sleeved inside the at least three steel strands 1, the fastening rings 22 are sleeved outside the at least three steel strands 1, and the outer diameter of the erection rings 21 is larger than the inner diameter of the fastening rings 22, so that the radius of a circumscribed circle formed by the at least three steel strands 1 can be changed along the length direction of the steel strands 1; the concrete grouting structure is characterized in that the at least three steel strands 1 are arranged in a concrete layer 3 in advance, one ends of the at least three steel strands 1 extend out of the concrete layer 3, the outer diameter of the concrete layer 3 is smaller than the inner diameter of the anchor hole 6, so that a gap for pouring concrete or mortar 7 is formed between the concrete layer 3 and the anchor hole 6, a grouting pipe 4 is also pre-embedded in the concrete layer 3, and two ends of the grouting pipe 4 respectively extend out of the concrete layer 3. The erection ring and the fastening ring are both circular, and the steel strand 1 is connected with the erection ring 21 and the fastening ring 22 through bundling.
In some embodiments, the anchoring openings 6 of the present invention are equal diameter anchoring openings. In some embodiments, the anchor eye 6 of the present invention includes an enlarged head section and a non-enlarged head section. That is, the present invention can be used for both a general anti-floating anchor hole and an enlarged head anti-floating anchor rod.
Preferably, the grouting pipe 4 is disposed at the center of at least three steel strands 1, that is, the steel strands 1 are uniformly distributed on the periphery of the grouting pipe 4.
In some embodiments, the concrete layer 3 is sequentially divided into an upper concrete layer, a middle concrete layer and a lower concrete layer along the length direction of the at least three steel strands 1, and the peripheries of the middle concrete layer and the lower concrete layer are provided with grooves or convex ribs 4 for increasing the contact area with the injected concrete or mortar 7.
In some embodiments, the periphery of the steel strand 1 in the upper concrete layer is connected with a spiral rib 8, and the head position is reinforced by the spiral rib 8, so that the strength of the head of the anti-floating anchor rod is improved.
In a specific implementation, the concrete layer 3 can be formed by pouring C30 fine stone concrete. The concrete injected into the anchor hole can also adopt C30 fine stone concrete; the mortar injected into the anchor eye may be M30 cement mortar.
The specific structural form of the groove or the ridge 5 of the present invention is not limited, and preferably, the groove or the ridge 5 is annular.
In some embodiments, the standing ring 21 and the fastening ring 22 are disposed on the steel strand 1 in the middle and lower concrete layers.
According to the prefabricated prestressed anti-floating anchor rod, at least three steel strands are embedded in a concrete layer, so that the structure of the anchor rod body is changed into the steel strands, the erection ring, the fastening ring, the grouting pipe and the concrete layer, the contact between the steel strands in the existing anchor hole and concrete or mortar poured into the anchor hole is changed into the contact between the concrete layer and the concrete or mortar poured into the anchor hole, on one hand, the integrity between the anchor rod body and the concrete or mortar poured into the anchor hole is improved through size increase, and on the other hand, compared with the situation that the steel strands are directly utilized to pour the concrete or mortar into the anchor hole, the concrete or mortar poured into the anchor hole has better viscosity and integrity between the concrete layer and the concrete or mortar; thereby improve anti-floating anchor rod's wholeness, durability and reliability, prevent that anti-floating anchor rod from appearing the cracked problem.
Meanwhile, compared with the anchor rod body (steel strand) in the prior art, the anchor rod body formed by the steel strand, the erection ring, the fastening ring, the grouting pipe and the concrete layer has higher strength, so that the anchor rod body can be conveniently implanted into the anchor hole, and the difficulty of implanting into the anchor hole is reduced.
According to the prefabricated prestressed anti-floating anchor rod, at least three steel strands are connected together through the erection ring and the fastening ring, the diameters of the erection ring and the fastening ring are different, so that the radius of a circumscribed circle formed by the steel strands can be changed along the length direction of the steel strands, the contact area between the steel strands and a concrete layer can be increased, the steel strands and the concrete layer can form an organic whole, when prestress is applied, the steel strands and the concrete layer bear force together, and the prestress applied by the anti-floating anchor rod can be increased. Compared with the prior art, the method has the advantages that the depth of the anchor hole can be reduced by increasing the depth of the anchor hole, so that the construction cost of the anti-floating anchor rod is reduced.
Claims (4)
1. The prefabricated prestressed anti-floating anchor rod comprises at least three steel strands (1) extending into an anchor hole, and is characterized in that the at least three steel strands (1) are connected together through erection rings (21) and fastening rings (22) which are arranged at intervals, the erection rings (21) are sleeved inside the at least three steel strands (1), the fastening rings (22) are sleeved outside the at least three steel strands (1), and the outer diameter of the erection rings (21) is larger than the inner diameter of the fastening rings (22), so that the radius of a circumscribed circle formed by the at least three steel strands (1) can be changed along the length direction of the steel strands (1); the concrete grouting structure is characterized in that the at least three steel strands (1) are arranged in the concrete layer (3) in advance, one ends of the at least three steel strands (1) extend out of the concrete layer (3), the outer diameter of the concrete layer (3) is smaller than the inner diameter of the anchor hole (6), so that a gap for pouring concrete or mortar (7) is formed between the concrete layer and the anchor hole, a grouting pipe (4) is also embedded in the concrete layer (3), and two ends of the grouting pipe (4) respectively extend out of the concrete layer.
2. The prefabricated prestressed anti-floating anchor rod as claimed in claim 1, wherein said concrete layer (3) is sequentially divided into an upper concrete layer, a middle concrete layer and a lower concrete layer along the length direction of said at least three steel strands (1), and the peripheries of said middle concrete layer and said lower concrete layer are provided with grooves or ridges (5) for increasing the contact area with the injected concrete or mortar.
3. The prefabricated prestressed anti-floating anchor rod as claimed in claim 2, wherein the periphery of the steel strand (1) in the upper concrete layer is connected with a spiral rib (8).
4. The prefabricated prestressed anti-floating anchor rod as claimed in claim 2 or 3, wherein said erecting ring (21) and fastening ring (22) are provided on the steel strand (1) in the middle and lower concrete layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369104.8U CN216999690U (en) | 2021-09-29 | 2021-09-29 | Prefabricated formula prestressing force anti-floating anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369104.8U CN216999690U (en) | 2021-09-29 | 2021-09-29 | Prefabricated formula prestressing force anti-floating anchor rod |
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| Publication Number | Publication Date |
|---|---|
| CN216999690U true CN216999690U (en) | 2022-07-19 |
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| CN202122369104.8U Active CN216999690U (en) | 2021-09-29 | 2021-09-29 | Prefabricated formula prestressing force anti-floating anchor rod |
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| CN (1) | CN216999690U (en) |
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2021
- 2021-09-29 CN CN202122369104.8U patent/CN216999690U/en active Active
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