CN217204917U

CN217204917U - High-strength anchor backing plate

Info

Publication number: CN217204917U
Application number: CN202220570685.3U
Authority: CN
Inventors: 韦中夫; 梅治乾; 唐茂; 刘建英; 郑琪; 黄振桂; 温贤青
Original assignee: Liuzhou Qm Construction Machinery Co ltd
Current assignee: Liuzhou Qm Construction Machinery Co ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-08-16
Anticipated expiration: 2032-03-16

Abstract

The utility model discloses a high-strength anchor backing plate relates to prestressed anchorage technical field, and it includes bearing plate and a awl section of thick bamboo, and the bearing plate is outwards arranged along circumference from the main aspects of a awl section of thick bamboo, and the outer peripheral face interval arrangement of a awl section of thick bamboo has two at least rib rings, is connected with four at least reinforced rib boards between the face of bearing plate and the most close rib ring, and reinforced rib board sets up along the plain line of a awl section of thick bamboo, and reinforced rib board's outside limit is for having the stair structure of two at least steps. The utility model provides a structural strength of current anchor backing plate can't satisfy the problem that 2400MPa high-strength steel strand wires anchor required.

Description

High-strength anchor backing plate

Technical Field

The utility model belongs to the technical field of the prestressed anchorage technique and specifically relates to a with supporting high strength anchor backing plate who uses of high strength steel strand wires.

Background

In the prestressed concrete member, the anchor backing plate is a member for connecting the prestressed steel strand and the anchor plate, and provides a supporting function for the anchorage device, so that when the prestressed concrete member works and is pressed, the stress during tensioning can be dispersed into the beam body concrete, the sliding of the anchorage device can be blocked, and the anchorage device is prevented from collapsing into the concrete during tensioning, causing local damage to the concrete and the like. As a main stress-bearing member in prestress construction, the strength of the anchor backing plate must meet the compressive stress during prestress tensioning construction. At present, under the same sectional area of the commonly used phi 15.2 steel strand, the tensile force which can be borne by the conventional 2400MPa high-strength steel strand is far greater than that of the conventional 1860MPa common steel strand, which indicates that the pressure to be borne by the anchor backing plate is larger, and the common anchor backing plate is prone to cracking because the common anchor backing plate cannot bear the pressure. In order to meet the requirements of bridge construction, 2400MPa grade high-strength steel strands are slowly popularized, and an anchor backing plate with structural strength meeting the anchoring requirements of 2400MPa grade high-strength steel strands needs to be researched and developed to make up for the vacancy in the market.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-strength anchor backing plate, the structural strength that this kind of anchor backing plate can solve current anchor backing plate can't satisfy the problem that 2400MPa high-strength steel strand wires anchor required.

In order to solve the above problem, the utility model discloses a technical scheme is: the high-strength anchor backing plate comprises a bearing plate and a conical cylinder, wherein the bearing plate is arranged outwards from the large end of the conical cylinder along the circumferential direction, at least two reinforcing rib rings are arranged on the outer circumferential surface of the conical cylinder at intervals, at least four reinforcing rib plates are connected between the bearing plate and the nearest plate surface of each reinforcing rib ring, the reinforcing rib plates are arranged along the plain line of the conical cylinder, and the outer side edges of the reinforcing rib plates are of a stepped structure with at least two steps.

In the above technical solution of the high-strength anchor backing plate, a more specific technical solution may also be: the pressure bearing plate is provided with a partial pressure conical surface connected with the outer wall of the conical cylinder, and the reinforcing rib plate is perpendicular to the conical cylinder, the partial pressure conical surface and the pressure bearing plate.

Furthermore, a positioning block is arranged on the pressure bearing plate, the surface of the positioning block facing the reinforcing rib ring is a rib plate connecting surface, the rib plate connecting surface is perpendicular to the axis of the conical cylinder, and the reinforcing rib plate is connected to the rib plate connecting surface.

Furthermore, the positioning block extends from the outer edge of the pressure bearing plate to the partial pressure conical surface radially and inwards.

Furthermore, a positioning hole is formed in the positioning block, and the positioning hole penetrates through the bearing plate from the rib plate connecting surface of the positioning block along the axial direction.

Furthermore, the thickness of the pressure bearing plate is larger than that of the reinforcing rib plate.

Further, the outer side edge between each step of the reinforcing rib plate is an inclined edge.

Furthermore, the bearing plate with be provided with slip casting portion between the outer wall of awl section of thick bamboo, be equipped with the slip casting hole in the slip casting portion, the one end in slip casting hole is seted up on the awl section of thick bamboo inner wall, the other end is seted up on the outer terminal surface of bearing plate, the slip casting hole site one section of bearing plate is equipped with the internal thread.

Further, the outer end face of the bearing plate is provided with an anchor plate positioning groove which is coaxial with the conical cylinder.

Furthermore, the pressure dividing conical surface, the corner between the reinforcing rib ring and the conical cylinder and the corner of each step of the reinforcing rib plate are all rounded corners.

Since the technical scheme is used, compared with the prior art, the utility model following beneficial effect has:

1. at least four reinforcing rib plates are connected between the pressure bearing plate of the anchor backing plate and the nearest reinforcing rib ring, so that the force generated when the pressure bearing plate is pressed can be dispersed, and the pressure bearing plate is prevented from being cracked due to stress concentration; two steps are no less than in the setting of reinforcing floor outside limit, and the area of contact of multiplicable anchor backing plate itself and concrete, area of contact grow, under the unchangeable condition of pressure, the atress can correspondingly reduce, avoids anchor backing plate stress concentration and the fracture to sink under the high pressure, and its structural strength can satisfy 2400MPa high-strength steel strand wires anchor requirement.

2. The pressure bearing plate is provided with the partial pressure conical surface, so that the force transmission direction can be increased, and the force on the pressure bearing plate can be quickened to be dispersed.

3. Through locating piece connection bearing plate and reinforced rib board, set up the locating hole on the locating piece, the bearing plate thickening can improve structural strength, avoids the bearing plate fracture.

4. The outer side edges between the reinforced rib plate steps are inclined to form a tower-shaped structure, so that the contact area between the anchor backing plate and the concrete block is increased, and the anchor backing plate can bear larger force.

5. Set up the slip casting portion of taking the slip casting hole between bearing plate and awl section of thick bamboo outer wall, conveniently carry out the grout to the ground tackle that stretch-draw was accomplished, the slip casting hole is located one section of bearing plate and establishes the internal thread, can make outside slip casting pipe and anchor backing plate carry out threaded connection, improves the reliability of connecting.

6. The corners of each part or part of the anchor backing plate are rounded to reduce stress concentration.

7. The anchor backing plate has light weight, low material consumption and low manufacturing cost.

Drawings

Fig. 1 is a schematic structural view of the high-strength anchor plate.

Fig. 2 is a front view of the present high strength anchor pad.

Fig. 3 is a schematic view of the internal structure of the high-strength anchor plate.

Fig. 4 is a structural schematic diagram of the high-strength anchor plate in another direction.

Fig. 5 is a schematic view of the use state of the high-strength anchor plate.

The reference numbers illustrate: 1. a pressure bearing plate; 1-1, an anchor plate positioning groove; 2. positioning blocks; 2-1, positioning holes; 3. a reinforcing rib plate; 4. a grouting part; 4-1, grouting holes; 4-11, internal threads; 5. a conical cylinder; 6. a first reinforcing rib ring; 7. a second reinforcing rib ring; 8. a pressure-dividing conical surface; 100. an elastic clip; 200. a working anchor plate; 300. a high-strength anchor backing plate; 400. high-strength steel strands; 500. a spiral rib; 600. a bellows; 700. and (3) concrete.

Detailed Description

The invention will be described in more detail with reference to the following embodiments:

the high-strength anchor backing plate shown in fig. 1 to 4 is of an integral casting structure, and mainly comprises a pressure-bearing plate 1, a positioning block 2, a reinforcing rib plate 3, a grouting part 4, a conical cylinder 5 and reinforcing rib rings, wherein the pressure-bearing plate 1 is a main compression part, the pressure-bearing plate 1 is arranged outwards from the large end of the conical cylinder 5 along the circumferential direction, an anchor plate positioning groove 1-1 coaxial with the conical cylinder 5 is formed in the outer end face of the pressure-bearing plate 1, at least two reinforcing rib rings are arranged on the outer circumferential surface of the conical cylinder 5 at intervals, and the reinforcing rib rings are used for supporting the force transmitted from the reinforcing rib plate 3 and the conical cylinder 5, and also used for reinforcing the strength of the conical cylinder 5, so as to disperse the force and increase the overall strength of the anchor backing plate; at least four reinforcing ribs 3 are connected between the pressure plate 1 and the plate surface of the nearest reinforcing rib ring for dispersing the force on the pressure plate 1. The high-strength anchor backing plate of the embodiment is provided with two reinforcing rib rings with the same thickness and four reinforcing rib plates 3 which are uniformly distributed, wherein the two reinforcing rib rings are respectively a first reinforcing rib ring 6 positioned in the middle of a conical cylinder 5 and a second reinforcing rib ring 7 relatively close to the small end of the conical cylinder 5, and the first reinforcing rib ring 6 and the second reinforcing rib ring 7 are both parallel to a pressure bearing plate; four reinforcing ribs 3 are connected between the first reinforcing rib ring 6 and the pressure receiving plate 1, and each reinforcing rib 3 is provided along a plain line of the cone 5. The thickness of the pressure bearing plate 1 is thicker than that of the reinforcing rib ring, the pressure bearing plate 1 is provided with a pressure dividing conical surface 8 connected with the outer wall of the conical cylinder 5, a sufficient distance is reserved between the large end of the pressure dividing conical surface 8 and the outer edge of the pressure bearing plate 1 so as to facilitate the opening of the positioning hole 2-1, and the small end of the pressure dividing conical surface 8 is in smooth transition with the outer wall of the conical cylinder 5. The pressure bearing plate 1 is provided with a positioning block 2 corresponding to the reinforcing rib plate 3, the positioning block 2 extends from the outer edge of the pressure bearing plate 1 to the pressure dividing conical surface 8 along the radial direction, the end face of the positioning block 2 facing the first reinforcing rib ring 6 is a rib plate connecting face, the rib plate connecting face is perpendicular to the axis of the conical cylinder 5, the reinforcing rib plate 3 is connected to the rib plate connecting face, and each reinforcing rib plate 3 is respectively and perpendicularly connected with the positioning block 2, the pressure dividing conical surface 8, the conical cylinder 5 and the first reinforcing rib ring 6. In order to reduce stress concentration, the outer side edge of the reinforcing rib plate 3 is of a step structure with two steps, the steps can be added according to needs, the outer side edge between the steps of the reinforcing rib plate 3 is an inclined edge, and the reinforcing rib plate 3 is made to form a tower-shaped structure which is arranged from the pressure bearing plate 1 to the direction of the first reinforcing rib ring 6; the corners between the partial pressure conical surface 8 and the conical cylinder 5, the corners between each reinforcing rib ring and the conical cylinder 5 and the corners of each step of the reinforcing rib plate 3 are rounded corners; and a positioning hole 2-1 for mounting the bolt is formed in the positioning block 2, and the positioning hole 2-1 penetrates through the bearing plate 1 along the axial direction from the rib plate connecting surface of the positioning block 2 to form a through hole for mounting the bolt. A grouting part 4 which is convenient for grouting the tensioned anchorage device is arranged between the bearing plate 1 and the outer wall of the conical cylinder 5, a grouting hole 4-1 is arranged in the grouting part 4, one end of the grouting hole 4-1 is arranged on the inner wall of the conical cylinder 5, the other end is arranged on the outer end face of the bearing plate 1, and an internal thread 4-11 is arranged at one section of the grouting hole 4-1, which is positioned on the bearing plate 1.

As shown in fig. 5, in the process of manufacturing the prestressed concrete member using the high-strength anchor backing plate 300, the corrugated tube 600 penetrated with 2400MPa high-strength steel strands 400, the high-strength anchor backing plate 300 and the spiral ribs 500 sleeved on the high-strength anchor backing plate 300 are embedded in the concrete 700 in advance, after the concrete 700 reaches a certain strength, the working anchor plate 200 is pressed on the high-strength anchor backing plate 300 through the high-strength steel strands 400, the elastic clip 100 is driven into the tapered hole of the working anchor plate 200 through the high-strength steel strands 400, due to the tapered structure of the elastic clip 100 and the tapered hole structure of the working anchor plate 200, when the high-strength steel strands 400 are stressed, the tensile force of the high-strength steel strands 400 pulls the elastic clip 100 to follow the tapered hole of the working anchor plate 200, the working clip 100 follows the working anchor plate 200, the biting force of the working clip 100 on the high-strength steel strands 400 is larger, so that the high-strength steel strands 400 cannot slip, the high strength anchor pad 300 is pressed against the working anchor plate 200 to keep the working anchor plate 200 stationary relative to each other and to transmit the tension of the steel strands to the concrete 700. As the main bearing part of the high-strength anchor backing plate 300, when the anchor is stretched, the bearing plate 1 bears the pressure of the working anchor plate 200, the force is transmitted to the reinforcing rib plate 3 and the conical cylinder 5, and the force on the reinforcing rib plate 3 and the conical cylinder 5 is transmitted to the first reinforcing rib ring 6 and the second reinforcing rib ring 7, so that the effect of dispersion is achieved, and the bearing plate 1 is prevented from cracking due to stress concentration. After the anchorage device is tensioned, an external grouting pipe is connected with a grouting hole 4-1 of the bearing plate 1 of the high-strength anchorage backing plate 300 through threads, special cement grout is poured into the corrugated pipe 600 through the grouting hole 4-1 to fill the space between the corrugated pipe 600 and the high-strength steel stranded wire 400, and after the cement grout is expanded and solidified, the high-strength steel stranded wire 400 is prevented from being corroded.

The contact area between the high-strength anchor backing plate and concrete is increased, and the bearing capacity is larger; structurally, the high-strength anchor backing plate has more reinforcing rib plates with tower-shaped structures than the common anchor backing plate, so that the contact area of the anchor backing plate and concrete is increased, the concentrated stress of the anchor backing plate is avoided, and the strength of the anchor backing plate is increased; the thickness of the bearing plate is thickened and the reinforcing rib plate is additionally arranged on the back of the bearing plate according to actual requirements on the basis of a common anchor backing plate, and the outer diameter and the length of the anchor backing plate are not changed, so that the original basic appearance is kept, and the strength of the anchor backing plate is increased; the anchor backing plate is integrally cast, the structure is uniform and symmetrical, the angle of the reinforcing rib plate is proper, the anchor backing plate is convenient to manufacture a die and demould after casting, the structure is optimized and improved, and the casting material is not changed greatly. The high-strength anchor backing plate is light in weight, small in size, capable of reducing manpower and material resources during installation in a construction site, relatively convenient to use, and high-strength structure enables the anchor tensioning process to be more stable, and safety of constructors is guaranteed.

Claims

1. The utility model provides a high-strength anchor backing plate, includes a bearing plate and a awl section of thick bamboo, the bearing plate is followed the main aspects of a awl section of thick bamboo outwards arranges along circumference, the outer peripheral face interval arrangement of a awl section of thick bamboo has two at least enhancement rib rings, its characterized in that: at least four reinforcing rib plates are connected between the pressure bearing plate and the plate surface of the reinforcing rib ring closest to the pressure bearing plate, the reinforcing rib plates are arranged along the plain line of the conical cylinder, and the outer side edge of each reinforcing rib plate is of a step structure with at least two steps.

2. The high strength anchor pad of claim 1, wherein: the pressure bearing plate is provided with a partial pressure conical surface connected with the outer wall of the conical cylinder, and the reinforcing rib plate is perpendicular to the conical cylinder, the partial pressure conical surface and the pressure bearing plate.

3. The high strength anchor pad of claim 2, wherein: the bearing plate is provided with a positioning block, the surface of the positioning block facing the reinforcing rib ring is a rib plate connecting surface, the rib plate connecting surface is perpendicular to the axis of the conical cylinder, and the reinforcing rib plate is connected to the rib plate connecting surface.

4. The high strength anchor pad of claim 3, wherein: the positioning block extends from the outer edge of the pressure bearing plate to the partial pressure conical surface radially and inwards.

5. The high strength anchor pad of claim 4, wherein: the positioning block is provided with a positioning hole, and the positioning hole penetrates through the bearing plate from the rib plate connecting surface of the positioning block along the axial direction.

6. The high strength anchor pad of claim 5, wherein: the thickness of the pressure bearing plate is larger than that of the reinforcing rib plate.

7. A high strength anchor pad according to any one of claims 1 to 6, wherein: the outer side edge between each step of the reinforcing rib plate is an inclined edge.

8. The high strength anchor pad of claim 7, wherein: the bearing plate with be provided with slip casting portion between the outer wall of awl section of thick bamboo, be equipped with the slip casting hole in the slip casting portion, the one end in slip casting hole is seted up on the awl section of thick bamboo inner wall, and the other end is seted up on the outer terminal surface of bearing plate, the slip casting hole is located one section of bearing plate is equipped with the internal thread.

9. The high strength anchor pad of claim 8, wherein: and the outer end face of the bearing plate is provided with an anchor plate positioning groove which is coaxial with the conical cylinder.

10. A high strength anchor pad according to claim 2, wherein: the pressure dividing conical surface, the corner between the reinforcing rib ring and the conical cylinder and the corner of each step of the reinforcing rib plate are all rounded corners.