CN217480263U

CN217480263U - Prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure

Info

Publication number: CN217480263U
Application number: CN202221252090.XU
Authority: CN
Inventors: 周国斌
Original assignee: China Aviation Changsha Design And Research Co ltd
Current assignee: China Aviation Changsha Design And Research Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-23
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses a prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure, which comprises a prestressed anchor rod and a basement bottom plate, wherein the top end of the prestressed anchor rod is provided with a tension structure and an anchoring structure, the anchoring structure is positioned in the basement bottom plate, the upper part of the prestressed anchor rod is of a round platform structure, the area of the upper bottom of the round platform structure is larger than that of the lower bottom, and a spiral stirrup is arranged in the round platform structure; the anchoring structure is a conversion reinforcing steel bar, the upper part of the conversion reinforcing steel bar is anchored in the basement bottom plate in a cast-in-place mode, and the lower part of the conversion reinforcing steel bar is fixedly connected with the spiral stirrup. The utility model discloses an increase stock top compressive capacity adopts pressure type stock simultaneously, with stock top conquassation and prevent that the stock from pulling the fracture when can effectively avoiding stretch-draw, through the conversion reinforcing bar anchor in the bottom plate, avoided steel strand wires to be difficult to the shortcoming of direct anchor in the bottom plate.

Description

Prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure

Technical Field

The utility model belongs to the technical field of the building, especially, relate to a prestressing force steel strand wires resistance to plucking pressure type stock conversion anchor anti-floating structure.

Background

At present, the anti-floating structure of the domestic prestressed steel strand pulling pressure type anchor rod and the basement bottom plate are generally connected by adopting the design that the prestressed steel strand penetrates through the bottom plate for tensioning and anchoring connection, the principle of the design is that the prestressed steel strand and a sleeve pipe penetrate through the bottom plate, the base plate is tensioned again after the strength of the base plate meets the requirement, and then the sleeve pipe hole is sealed and blocked, so that the sleeve pipe is easy to seep water, the anchor rod is difficult to treat if the anchor rod is found to be unqualified during tensioning, and the using effect of the basement is finally influenced.

The chinese patent application with publication number CN112376627A discloses an anti-floating structure of a prestressed anchor. The prestressed anchor anti-floating structure comprises a prestressed anchor and a basement bottom plate, wherein the prestressed anchor comprises an anchor body and a rib body positioned in the center of the anchor body, and a tensioning structure is arranged at the top end of the anchor body; the lower end of the rib body is fixed on the lower part of the anchor rod body, and the upper part of the anchor rod body is provided with a hollow cavity extending along the axis of the anchor rod body; the upper part of the rib body penetrates out of the hollow cavity and is fixedly connected with the tensioning structure, and a gap is formed between the hollow cavity and the rib body; and an anchoring structure is arranged above the tensioning structure, the anchoring structure is positioned in the basement bottom plate, and the top of the rib body is fixedly connected with the anchoring structure. Although this application is under construction stage and is exerted pressure at the body of rod top, during the use, because the buoyancy effect of water, body of rod top pressure can shift to the bottom plate, and the body of rod still is tensile type stock, can not prevent during the use stock tension fracture. And this application stock top atress area is little leads to local compressive capacity relatively poor, and stock top is easy crushing during the stretch-draw, seriously influences safety in utilization.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prestressing force steel strand resistance to plucking pressure type stock conversion anchor anti-floating structure to the technical problem of stock top easy conquassation when solving the stretch-draw.

In order to achieve the above purpose, the specific technical solution of the present invention is as follows:

a prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure comprises a prestressed anchor rod and a basement bottom plate, wherein the prestressed anchor rod is arranged at the lower end of the basement bottom plate, a tensioning structure and an anchoring structure are arranged at the top end of the prestressed anchor rod, the anchoring structure is positioned in the basement bottom plate, the upper portion of the prestressed anchor rod is an inverted round table or frustum structure, the area of the upper bottom of the round table structure is larger than that of the lower bottom of the round table structure, a spiral stirrup is arranged in the round table structure, and the spiral stirrup is matched with the round table structure;

the anchoring structure is a conversion reinforcing steel bar, the upper part of the conversion reinforcing steel bar is anchored in the basement bottom plate in a cast-in-place mode, and the lower part of the conversion reinforcing steel bar is fixedly connected with the spiral stirrup.

Therefore, the utility model discloses expand prestressed anchorage pole stretch-draw end to design into the area of upper base and be greater than the area round platform structure of going to the bottom with it, be similar to a "tubaeform". Through this kind of design, increased stock top compressive capacity, with stock top crushing when preventing stretch-draw. Meanwhile, the pressure type anchor rod is adopted, the anchor rod can be prevented from being cracked under tension, and the application range is wide. In the prestressed anchor anti-floating structure of the prior art CN112376627A, although pressure is applied to the top of the rod body in the construction stage, the anchor is prone to tension cracking due to the buoyancy of water during use. And the utility model discloses a conversion reinforcing bar is anchored in the bottom plate, has avoided the shortcoming that steel strand wires are difficult to direct anchor in the bottom plate.

Further, the prestressed anchor pole includes stock and steel strand wires, tension structure includes first bearing plate and first ground tackle, first ground tackle sets up the upper end of first bearing plate, just supreme continuous with first bearing plate and first ground tackle in proper order is down followed to the steel strand wires. Compare the prior art muscle body and adopt PSB finish rolling screw-thread steel, the utility model discloses a steel strand wires, intensity is high, with little, the more economy of steel volume.

And furthermore, a sleeve is arranged outside the steel strand at the lower end of the tension structure.

Further, the prestressed anchor rod comprises an anchor rod and a steel strand, a fixing structure is arranged at the bottom end of the steel strand, the fixing structure comprises a second bearing plate and a second anchor, the second anchor is arranged at the lower end of the second bearing plate, and the steel strand is sequentially connected with the second bearing plate and the second anchor from top to bottom.

Furthermore, the sleeve is sleeved outside the steel strand between the tensioning structure and the fixing structure.

In addition, the conversion reinforcing steel bars are plug welded with the first bearing plate through holes.

In addition, the top of the conversion reinforcing steel bar is provided with an anti-falling structure.

In addition, anti-disengaging structure is the crotch or the anchor end of setting at conversion reinforcing bar top.

The utility model has the advantages of it is following:

pass the design that bottom plate stretch-draw anchor is connected for traditional prestressing steel strand wires, the utility model discloses will set up the mode of conversion reinforcing bar through the stock top, with regard to stretch-draw before the bottom plate construction, no longer have the sleeve pipe to pass the bottom plate, can effectively reduce the adverse effect that stock department infiltration produced the basement, can in time handle the unqualified stock of stretch-draw discovery.

Compared with the prior art, the utility model discloses an increase stock top compressive capacity adopts pressure type stock simultaneously, with stock top conquassation and prevent that the stock from pulling the fracture when can effectively avoiding the stretch-draw, through the conversion reinforcing bar anchor in the bottom plate, has avoided steel strand wires to be difficult to the shortcoming of direct anchor in the bottom plate.

Drawings

FIG. 1 is a schematic view of the anti-floating structure of the present invention;

fig. 2 is a sectional view of the upper part of the prestressed anchor rod of the present invention.

The notation in the figure is: 1. converting the reinforcing steel bars; 2. a first anchor; 3. a first bearing plate; 4. a spiral stirrup; 5. steel strand wires; 6. a sleeve; 7. an anchor rod; 8. a second bearing plate; 9. a second anchor; 10. basement bottom plate.

Detailed Description

For better understanding of the objects, structure and functions of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model discloses an anti floating structure of prestressing force steel strand wires resistance to plucking pressure type stock conversion anchor includes prestressing force anchor and basement bottom plate 10, prestressing force anchor sets up the lower extreme of basement bottom plate 10. The upper portion of the prestressed anchor rod is of a circular truncated cone structure, the area of the upper bottom of the circular truncated cone structure is larger than that of the lower bottom of the circular truncated cone structure, a spiral stirrup 4 is arranged in the circular truncated cone structure, and the spiral stirrup 4 is matched with the circular truncated cone structure. The prestressed anchor rod comprises an anchor rod 7 and a steel strand 5, wherein the top end of the anchor rod 7 is provided with a tension structure and an anchoring structure, and the anchoring structure is located in the basement bottom plate 10.

The anchoring structure is a conversion reinforcing steel bar 1, the upper part of the conversion reinforcing steel bar 1 is cast in situ and anchored in the basement bottom plate 10, and the top of the conversion reinforcing steel bar 1 is provided with an anti-falling structure. Preferably, the anti-dropping structure is a hook arranged at the top of the conversion reinforcing steel bar. The lower part of the conversion steel bar 1 is fixedly connected with the spiral stirrup 4.

Stretch-draw structure includes first bearing plate 3 and first ground tackle 2, first ground tackle 2 sets up the upper end of first bearing plate 3, just supreme 3 and the first ground tackle 2 of first bearing plate links to each other with in proper order down of steel strand wires 5, just conversion reinforcing bar 1 and the 3 perforation plug welds of first bearing plate.

The bottom of steel strand wires 5 is provided with fixed knot and constructs, fixed knot constructs including second bearing plate 8 and second ground tackle 9, second ground tackle 9 sets up the lower extreme at second bearing plate 8, steel strand wires 5 are from last to linking to each other with second bearing plate 8 and second ground tackle 9 down in proper order.

And a sleeve 6 is arranged outside the steel strand 5 between the tension structure and the fixed structure.

During construction, the second bearing plate 8 and the second anchor 9 are cast with the anchor rod 7 into a whole, and are connected with the first anchor 2 and the first bearing plate 3 which are arranged at the top of the anchor rod 7 through the steel strand 5, and prestress tensioning is carried out after the anchor rod construction is finished and the design strength is reached; the spiral stirrup 4 is arranged in the circular truncated cone structure at the upper part of the prestressed anchor rod to increase the local compressive strength of the top of the anchor rod and simultaneously reserve an operating surface for tensioning construction; the anchoring structure is arranged as a conversion reinforcing steel bar 1 and is connected with the basement bottom plate 10 into a whole when the bottom plate is poured, and the prestress of the steel strand 5 is transmitted to the basement bottom plate 10 through the first anchorage device 2, the first bearing plate 3 and the conversion reinforcing steel bar 1.

It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. A prestressed strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure comprises a prestressed anchor rod and a basement bottom plate (10), wherein the prestressed anchor rod is arranged at the lower end of the basement bottom plate (10), the top end of the prestressed anchor rod is provided with a tension structure and an anchoring structure, and the anchoring structure is positioned in the basement bottom plate (10), and the prestressed strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure is characterized in that the upper portion of the prestressed anchor rod is of an inverted round table or frustum structure, the area of the upper bottom of the round table structure is larger than that of the lower bottom of the round table structure, a spiral stirrup (4) is arranged in the round table structure, and the spiral stirrup (4) is matched with the round table structure;

the anchoring structure is a conversion steel bar (1), the upper part of the conversion steel bar (1) is anchored in the basement bottom plate (10) in a cast-in-place mode, and the lower part of the conversion steel bar (1) is fixedly connected with the spiral stirrup (4).

2. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure according to claim 1, wherein the prestressed steel strand pulling-resistant pressure type anchor rod comprises an anchor rod (7) and a steel strand (5), the tensioning structure comprises a first bearing plate (3) and a first anchor (2), the first anchor (2) is arranged at the upper end of the first bearing plate (3), and the steel strand (5) is sequentially connected with the first bearing plate (3) and the first anchor (2) from bottom to top.

3. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure as claimed in claim 2, wherein a sleeve (6) is arranged outside the steel strand (5) at the lower end of the tensioning structure.

4. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure as claimed in claim 1, wherein the prestressed steel strand comprises an anchor rod (7) and a steel strand (5), a fixing structure is arranged at the bottom end of the steel strand (5), the fixing structure comprises a second bearing plate (8) and a second anchor (9), the second anchor (9) is arranged at the lower end of the second bearing plate (8), and the steel strand (5) is sequentially connected with the second bearing plate (8) and the second anchor (9) from top to bottom.

5. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure as claimed in claim 4, wherein a sleeve (6) is sleeved outside the steel strand (5) between the tension structure and the fixing structure.

6. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure according to any one of claims 1 to 5, wherein the conversion steel bar (1) is plug-welded with the first bearing plate (3) through a hole.

7. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure according to any one of claims 1 to 5, wherein the top of the conversion steel bar (1) is provided with an anti-falling structure.

8. The prestressed steel strand pulling-resistant pressure type anchor rod conversion anchoring anti-floating structure as claimed in claim 7, wherein the anti-falling structure is a hook or an anchoring end arranged at the top of the conversion steel bar (1).