CN114960642A - Pretensioning prestressed anti-floating anchor rod - Google Patents
Pretensioning prestressed anti-floating anchor rod Download PDFInfo
- Publication number
- CN114960642A CN114960642A CN202210595000.5A CN202210595000A CN114960642A CN 114960642 A CN114960642 A CN 114960642A CN 202210595000 A CN202210595000 A CN 202210595000A CN 114960642 A CN114960642 A CN 114960642A
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- steel
- anchor rod
- floating anchor
- wall
- prestressed
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
The invention relates to the technical field of anti-floating anchor rods, in particular to a pretensioned prestressing anti-floating anchor rod which comprises prestressed steel strands, a strand tensioning anchorage device, a first steel base plate, a concrete cushion layer, a fixed support and a second steel base plate, wherein prefabricated parts which are equidistantly and parallelly distributed are arranged on the inner wall of the fixed support, first steel grouting sleeves are arranged inside the fixed support and the prefabricated parts, the prestressed steel strands are arranged inside the first steel grouting sleeves, the concrete cushion layer is arranged on the outer walls of the prestressed steel strands, first spiral ribs and second spiral ribs are respectively arranged on the outer walls of two sides of the concrete cushion layer, and the second steel base plate is arranged at the lower end inside the first steel grouting sleeves. The invention relates to a method for preparing a high-temperature-resistant ceramic material.
Description
Technical Field
The invention relates to the technical field of anti-floating anchor rods, in particular to a pretensioned prestressing anti-floating anchor rod.
Background
Prestressed concrete refers to a method for improving the performance of a reinforced concrete member by pre-stressing the reinforced concrete member during the prefabrication process thereof in order to improve the crack resistance of the reinforced concrete member and prevent the reinforced concrete member from cracking prematurely. The method for stretching reinforcing bar before pouring concrete is called pretensioning method, and is an anti-floating measure for underground structure of building engineering. The anti-floating anchor rod refers to a structural member arranged for resisting upward displacement of a building on the anti-floating anchor rod, is related to the height and change of underground water level, and is opposite to the stress direction of the compression-resistant pile.
Through the massive search, find that the anti-floating anchor rod device among the prior art is typical like a construction method of anti-floating anchor rod of prestressing force that publication number is CN101736760B discloses, its characteristic is to be equipped with the centering steel pipe in the stock body that is formed by several reinforcing bars along circumference equipartition, be equipped with the several barb on the reinforcing bar, centering steel pipe is that the several sets up and with the reinforcing bar rigid coupling along the axis interval of the stock body, barb and reinforcing bar welding, the concrete construction includes: grouting to form a pile; placing an anchor rod; and locking and sealing the anchor rod. Compared with the prior art, the invention has the advantages of simple structure, convenient construction, good anti-floating effect and low cost, and is particularly suitable for the reconstruction of old buildings with built underground structures and confined water.
At present, a bottom plate anti-floating anchor rod is usually designed by adopting a crack control standard and is limited by the defect of a durability design specification of the anti-floating anchor rod, the durability design of the anti-floating anchor rod is ignored by engineering designers all the time, and the application of prestress in the anchor rod has the advantages of controlling the crack of the anchor rod, but the prestress anti-floating anchor rod has the problems of complex construction process, large water seepage hidden danger, high engineering cost and the like, and the application of the prestress anti-floating anchor rod in engineering is limited.
Disclosure of Invention
The invention provides a pretensioned prestressing anti-floating anchor rod, which solves the technical problems.
The scheme for solving the technical problems is as follows: the pretensioned prestressing anti-floating anchor rod comprises prestressed steel strands, a strand tensioning anchorage device, a first steel base plate, a concrete cushion layer, a fixed support and a second steel base plate, wherein the inner wall of the fixed support is provided with prefabricated parts which are distributed in parallel at equal intervals, first steel grouting sleeves are arranged inside the fixed support and the prefabricated parts, the prestressed steel strands are arranged inside the first steel grouting sleeves, the outer wall of each prestressed steel strand is provided with the concrete cushion layer, the outer walls of two sides of each concrete cushion layer are respectively provided with a first spiral rib and a second spiral rib, and the second steel base plate is arranged at the lower end inside each first steel grouting sleeve.
The invention has the beneficial effects that: in the field construction link, firstly forming a hole at a set pile position, after hole cleaning is finished, placing an anti-floating anchor rod member prefabricated in engineering, then grouting the side wall of an anchor rod hole, detecting the anti-pulling performance after the side wall reaches the age, and finally constructing a bottom plate, wherein the top end of the anchor rod is provided with a stranded wire tensioning anchorage device, and the water buoyancy force borne by the basement bottom plate is transferred to the anchor rod; the device is a pretensioned prestressing anchor and simultaneously serves as an anchor rod and an anchoring part in a basement floor. The anti-floating anchor rod is tensioned and poured and maintained and formed in a factory, the anti-floating anchor rod structure avoids the problem of complex site tensioning operation on one hand, the construction quality of the prestressed anchor rod is guaranteed, on the other hand, the anchor rod and the node of the bottom plate do not need to reserve a part of bottom plate for post-pouring tensioning, the integrity of the basement bottom plate is guaranteed, and the water seepage hidden danger is eliminated.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the prestress wire is located inside the prefabricated part.
The beneficial effect of adopting the further scheme is that: the prestress steel strand can adjust prestressing force.
Further, a first steel backing plate is installed on one side of the outer wall of the upper end of the first steel grouting sleeve, a strand tensioning anchorage device is installed on one side of the outer wall of the upper end of the first steel backing plate, and the prestressed steel strands are located inside the strand tensioning anchorage device;
the outer wall of one side of the stranded wire tensioning anchorage device is provided with a first annular force transmission support in an inserting mode, and the first annular force transmission support is designed in an inclined shape.
The beneficial effect of adopting the further scheme is that: and the tensile strength of the prestressed steel strand is adjusted through a strand tensioning anchorage device.
Furthermore, the lower end in the fixed support is provided with a rear grouting part.
The beneficial effect of adopting the further scheme is that: grouting the side wall of the anchor rod hole firstly, and then grouting the rear grouting part.
Further, a second steel grouting sleeve is mounted on the outer wall of the lower end of the second steel base plate, the second steel grouting sleeve is designed in an inclined shape, and the number of openings of the second steel grouting sleeve is designed in three;
and a second annular force transmission support is installed on one side of the outer wall of the lower end of the second steel grouting sleeve, and the prestressed steel strand is located inside the second annular force transmission support.
The beneficial effect of adopting the further scheme is that: the grout flows to the lower end of the second annular force transmission bracket through the second steel grouting sleeve.
Furthermore, the first spiral rib and the second spiral rib are respectively in contact with the first steel base plate and the second steel base plate.
The beneficial effect of adopting the further scheme is that: the first spiral rib and the second spiral rib can adjust the stress of the slurry between the first steel base plate and the second steel base plate.
Further, the concrete cushion layer is located between the first steel cushion plate and the second steel cushion plate.
The beneficial effect of adopting the above further scheme is: the concrete pad can support the first steel tie plate and the second steel tie plate.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic sectional view of a fixing bracket structure of a pretensioned prestressing anti-floating anchor according to an embodiment of the present invention;
fig. 2 is a schematic top-sectional view of a prefabricated part structure of a pretensioned prestressed anti-floating anchor rod according to an embodiment of the present invention;
fig. 3 is a schematic plan-cut view of a first steel grouting sleeve structure of a pretensioned prestressed anti-floating anchor rod according to an embodiment of the present invention;
fig. 4 is a schematic view of a first annular force transmission bracket of a pretensioned prestressed anti-floating anchor according to an embodiment of the present invention;
fig. 5 is a schematic top-cut view of a second steel grouting casing structure of a pretensioned prestressed anti-floating anchor according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. pre-stressed steel strands; 2. a stranded wire tensioning anchorage device; 3. a first annular force transfer bracket; 4. a first steel backing plate; 5. a first spiral rib; 6. a concrete cushion; 7. a first steel grouting sleeve; 8. a prefabricated part; 9. fixing a bracket; 10. a post-grouting part; 11. a second steel grouting sleeve; 12. a second spiral rib; 13. a second steel backing plate; 14. a second annular force transfer bracket.
Detailed Description
The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-5, which are provided as examples to illustrate the invention and not to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, the invention provides a pretensioned prestressing anti-floating anchor, comprising a prestressed steel strand 1, a strand tensioning anchor 2, a first steel liner plate 4, a concrete cushion 6, a fixed support 9 and a second steel liner plate 13, wherein the inner wall of the fixed support 9 is provided with prefabricated parts 8 which are equidistantly and parallelly distributed, the fixed support 9 and the prefabricated parts 8 are respectively provided with a first steel grouting sleeve 7, the first steel grouting sleeve 7 is internally provided with the prestressed steel strand 1, the outer wall of the prestressed steel strand 1 is provided with the concrete cushion 6, the outer walls of two sides of the concrete cushion 6 are respectively provided with a first spiral rib 5 and a second spiral rib 12, the lower end of the inner part of the first steel grouting sleeve 7 is provided with the second steel liner plate 13, a predetermined pile position is formed in a site construction link, after hole cleaning is completed, an anti-floating anchor member prefabricated in the engineering is placed, then grouting is performed on the side wall of an anchor hole, after the basement floor reaches the age, the uplift resistance is detected, finally, a bottom plate is constructed, a stranded wire tensioning anchorage device 2 is arranged at the top end of the anchor rod, and the water buoyancy force borne by the basement floor is transferred to the anchor rod; the device is a pretensioned prestressing anchor and simultaneously serves as an anchor rod and an anchoring part in a basement floor. The anti-floating anchor rod is tensioned and poured and maintained and formed in a factory, the anti-floating anchor rod structure avoids the problem of complex site tensioning operation on one hand, the construction quality of the prestressed anchor rod is guaranteed, on the other hand, the anchor rod and the node of the bottom plate do not need to reserve a part of bottom plate for post-pouring tensioning, the integrity of the basement bottom plate is guaranteed, and the water seepage hidden danger is eliminated.
Preferably, the pre-stressed steel strand 1 is located inside the prefabricated part 8, and the pre-stress of the pre-stressed steel strand 1 can be adjusted.
Preferably, a first steel backing plate 4 is installed on one side of the outer wall of the upper end of the first steel grouting sleeve 7, a strand tensioning anchorage device 2 is installed on one side of the outer wall of the upper end of the first steel backing plate 4, and the prestressed steel strands 1 are located inside the strand tensioning anchorage device 2;
the outer wall of one side of the stranded wire stretching anchorage device 2 is provided with a first annular force transmission support 3 in an inserted connection mode, the first annular force transmission support 3 is designed in an inclined shape, and the stretching strength of the prestressed steel stranded wire 1 is adjusted through the stranded wire stretching anchorage device 2.
Preferably, the lower end of the inside of the fixing bracket 9 is provided with a post-grouting part 10, and the side wall of the anchor rod hole is grouted firstly, and then the post-grouting part 10 is grouted.
Preferably, the outer wall of the lower end of the second steel backing plate 13 is provided with a second steel grouting sleeve 11, the second steel grouting sleeve 11 is designed in an inclined shape, and the number of openings of the second steel grouting sleeve 11 is designed in three;
a second annular force transmission support 14 is installed on one side of the outer wall of the lower end of the second steel grouting sleeve 11, the prestressed steel strands 1 are located inside the second annular force transmission support 14, and grout flows to the lower end of the second annular force transmission support 14 through the second steel grouting sleeve 11.
Preferably, the first spiral rib 5 and the second spiral rib 12 are respectively in contact with the first steel base plate 4 and the second steel base plate 13, and the stress of the slurry between the first steel base plate 4 and the second steel base plate 13 can be adjusted by the first spiral rib 5 and the second spiral rib 12.
Preferably, the concrete pad 6 is located between the first steel shim plate 4 and the second steel shim plate 13, the concrete pad 6 being capable of supporting the first steel shim plate 4 and the second steel shim plate 13.
The specific working principle and the using method of the invention are as follows: in the field construction link, firstly, forming holes at a set pile position, after hole cleaning is completed, placing the anti-floating anchor rod component prefabricated in engineering, then grouting the side wall of the anchor rod hole, detecting the anti-pulling performance after the side wall reaches the age, finally, constructing a bottom plate, arranging a stranded wire tensioning anchorage device 2 at the top end of the anchor rod, and transmitting the water buoyancy force borne by the basement bottom plate to the anchor rod.
The anti-floating anchor rod is tensioned, poured and maintained to be formed in a factory, the anti-floating anchor rod structure avoids the problem of complex site tensioning operation on one hand, the construction quality of the prestressed anchor rod is guaranteed, and on the other hand, the anchor rod and the node of the bottom plate do not need to reserve a part of the bottom plate for post-pouring tensioning.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a pretensioning prestressing force anti-floating anchor rod which characterized in that: including prestressing steel strand wires (1), stranded conductor stretch-draw ground tackle (2), first steel backing plate (4), concrete cushion (6), fixed bolster (9) and second steel backing plate (13), equidistance parallel distribution's prefabricated part (8) are installed to fixed bolster (9) inner wall, inside first steel slip casting sleeve pipe (7) all being provided with of fixed bolster (9) and prefabricated part (8), first steel slip casting sleeve pipe (7) inside is provided with prestressing steel strand wires (1), prestressing steel strand wires (1) outer wall is provided with concrete cushion (6), concrete cushion (6) both sides outer wall is provided with first spiral muscle (5) and second spiral muscle (12) respectively, the inside lower extreme of first steel slip casting sleeve pipe (7) is provided with second steel backing plate (13).
2. The pretensioned prestressing anti-floating anchor rod of claim 1, wherein: the prestressed steel strand (1) is located inside the prefabricated part (8).
3. The pretensioned prestressed anti-floating anchor rod of claim 1, wherein: a first steel base plate (4) is installed on one side of the outer wall of the upper end of the first steel grouting sleeve (7), a strand tensioning anchorage device (2) is installed on one side of the outer wall of the upper end of the first steel base plate (4), and a prestressed steel strand (1) is located inside the strand tensioning anchorage device (2);
the outer wall of one side of the stranded wire tensioning anchor (2) is provided with a first annular force transmission support (3) in an inserting mode, and the first annular force transmission support (3) is designed in an inclined shape.
4. The pretensioned prestressed anti-floating anchor rod of claim 1, wherein: and a rear grouting part (10) is arranged at the lower end in the fixed support (9).
5. The pretensioned prestressed anti-floating anchor rod of claim 1, wherein: a second steel grouting sleeve (11) is arranged on the outer wall of the lower end of the second steel backing plate (13), the second steel grouting sleeve (11) is designed in an inclined shape, and the number of openings of the second steel grouting sleeve (11) is designed in three;
and a second annular force transmission support (14) is installed on one side of the outer wall of the lower end of the second steel grouting sleeve (11), and the prestressed steel strand (1) is located inside the second annular force transmission support (14).
6. The pretensioned prestressed anti-floating anchor rod of claim 1, wherein: the first spiral rib (5) and the second spiral rib (12) are respectively in contact with the first steel backing plate (4) and the second steel backing plate (13).
7. The pretensioned prestressed anti-floating anchor rod of claim 1, wherein: the concrete cushion layer (6) is located between the first steel cushion plate (4) and the second steel cushion plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595000.5A CN114960642A (en) | 2022-05-28 | 2022-05-28 | Pretensioning prestressed anti-floating anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595000.5A CN114960642A (en) | 2022-05-28 | 2022-05-28 | Pretensioning prestressed anti-floating anchor rod |
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| CN114960642A true CN114960642A (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210595000.5A Pending CN114960642A (en) | 2022-05-28 | 2022-05-28 | Pretensioning prestressed anti-floating anchor rod |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587506A (en) * | 2017-09-08 | 2018-01-16 | 江苏景源万河环境科技有限公司 | A kind of precast prestressed anchor pole rod member and construction |
| CN112502756A (en) * | 2020-11-30 | 2021-03-16 | 辽宁工程技术大学 | Precession type grouting anchor rod structure and using method |
| CN113217059A (en) * | 2021-06-03 | 2021-08-06 | 祝文畏 | Combined anchor rod with prestressed rod core |
| CN215482243U (en) * | 2021-04-15 | 2022-01-11 | 中国铁道科学研究院集团有限公司 | High-strength prestress system |
-
2022
- 2022-05-28 CN CN202210595000.5A patent/CN114960642A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587506A (en) * | 2017-09-08 | 2018-01-16 | 江苏景源万河环境科技有限公司 | A kind of precast prestressed anchor pole rod member and construction |
| CN112502756A (en) * | 2020-11-30 | 2021-03-16 | 辽宁工程技术大学 | Precession type grouting anchor rod structure and using method |
| CN215482243U (en) * | 2021-04-15 | 2022-01-11 | 中国铁道科学研究院集团有限公司 | High-strength prestress system |
| CN113217059A (en) * | 2021-06-03 | 2021-08-06 | 祝文畏 | Combined anchor rod with prestressed rod core |
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