WO2012058808A1

WO2012058808A1 - Pre-stressed anchor backing plate

Info

Publication number: WO2012058808A1
Application number: PCT/CN2010/078374
Authority: WO
Inventors: 周辛水
Original assignee: 杭州神列锻压件有限公司
Priority date: 2010-11-03
Filing date: 2010-11-03
Publication date: 2012-05-10

Abstract

A pre-stressed anchor backing plate for anchoring device comprises a pressure bearing plate portion (1) and a wire collecting tube (2). A through-hole (3) is formed perpendicular to the pressure bearing surface on the pressure bearing plate portion. The wire collecting tube has a connecting portion and a tube bundle portion (4) which is coaxial with the through-hole. The tube bundle portion is fixedly connected with the pressure bearing plate portion by the connecting portion. The pressure bearing plate portion is made of metal material suitable to bear the surface pressure, and the wire collecting tube is made of non-metallic material or metal material.

Description

Prestressed anchor pad

The invention relates to an anchoring device, in particular to a prestressed anchor pad.

Background technique

At present, the construction of highways and railways in China is developing rapidly. In order to ensure the safety of roads and railways, the application of prestressed products is indispensable. The prestressed anchors used in concrete structures are mainly composed of anchor plates, anchor plates and clamps. In the process of beam and plate construction of highways and railways, the anchor pad and the reinforcing spiral steel bar are first embedded in the beam concrete, and then the prestressed steel strands are passed through the anchor plates at both ends of the beam plate. The prestressed steel strand is fixed by the anchor plate and the clip, and then the prestressed steel strand is tensioned by the tensioner to make the beam plate have a certain curvature, so that the beam plate has a certain prestress and can resist Impact, anti-seismic, etc., the anchor pad plays the role of transmitting and dispersing pressure when tensioning.

Nowadays, the anchor pad used in China is usually made of all-metal material and produced by the process of sand casting. Due to the instability of the production process, the bearing part on the anchor pad casting and the tubular part of the restraining steel wire are made. It is not on a center line. Therefore, during the tensioning process, the steel strands will be rubbed against the tubular part, causing the steel strands to wear, and the stress on the pressure-bearing parts will be uneven, which will affect the quality of the project.

Summary of the invention

The technical problem to be solved by the present invention is to provide a prestressed anchor pad plate with simple structure, low cost and high standard. The prestressed anchor pad plate of the present invention is composed of a bearing plate and a collecting pipe. The bearing plate is provided with a through hole perpendicular to the bearing surface, and the collecting pipe comprises a connecting portion and a segment and the through hole. a tube bundle portion of the axis, the tube bundle portion is fixedly connected to the bearing plate through a connecting portion, the pressure receiving plate is made of a metal material adapted to withstand the pressure of the plate surface, and the collecting pipe is a non-metal which can be used as a pipe material Made of materials or metal materials.

The prestressed anchor pad plate of the present invention, wherein the bearing plate is provided with a grouting hole, the collecting pipe further comprises a grouting pipe, one end of the grouting pipe is connected with the grouting hole, and the guiding pipe is connected The other end is in communication with the central portion of the tube bundle portion.

The prestressed anchor pad plate of the present invention, wherein the wire collecting pipe is made of a metal material, the pipe bundle portion is welded to the bearing plate, and both ends of the slurry guiding pipe are respectively welded to the bearing plate and the tube bundle portion.

The prestressed anchor pad of the present invention, wherein the hub is made of a non-metallic material, wherein the connecting portion comprises a beading section wrapped around a periphery of the surface of the bearing plate.

The prestressed anchor pad of the present invention, wherein the connecting portion includes an extending portion attached to the inner wall of the through hole, and one end of the through hole is provided with a stepped hole having a hole diameter slightly larger than the through hole, and the inner end of the extending portion is The tube bundle portion is integrally connected, and the outer end of the extension portion is fitted in the stepped hole. The prestressed anchor pad of the present invention, wherein the connecting portion includes a snap ring, the plate surface of the bearing plate is provided with a boss surrounding the through hole, and the side wall of the boss is provided with a groove, One end of the snap ring is integrally connected with the tube bundle portion, and the other end of the snap ring is disposed in the groove.

The prestressed anchor pad of the present invention, wherein the outer wall of the tube bundle portion is provided with at least one annular reinforcing rib.

The prestressed anchor pad of the present invention, wherein the plate surface of the bearing plate is rectangular, and a plurality of connecting holes are formed on the plate surface of the bearing plate.

The prestressed anchor pad of the present invention, wherein the through hole and the tube bundle portion have a circular cross section.

The prestressed anchor pad of the present invention, wherein the through hole and the tube bundle portion have a rectangular cross section, and the outer wall of the tube bundle portion is provided with a plurality of reinforcing ribs.

The prestressed anchor pad of the present invention is different from the prior art in that the prestressed anchor pad of the present invention is composed of a bearing plate and a collecting pipe, and the bearing plate is made of a metal material and is mainly used for bearing tension. The pressure, and the collecting pipe is made of a non-metallic material or a metal material suitable for the pipe. Since the collecting pipe is not used to carry the tension during the tensioning process, it is mainly for restraining the prestressed steel strand. Therefore, the use of non-metallic materials or metal materials can not only make the products of the anchor pad more standard, but also reduce the cost under the condition of ensuring quality.

The connecting portion in the prestressed anchor pad of the present invention can fix the tube bundle portion on the bearing plate in various forms; and the cross-sectional shape of the through hole and the tube bundle portion on the bearing plate can be designed into a circular shape according to the needs in the project. Or rectangle.

The prestressed anchor pad of the present invention will be further described below with reference to the accompanying drawings.

DRAWINGS

Figure 1 is a front elevational view of a first embodiment of a prestressed anchor pad of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Figure 3 is a front elevational view of the bearing plate of the first embodiment of the prestressed anchor pad of the present invention;

Figure 4 is a cross-sectional view taken along line B-B of Figure 3;

Figure 5 is a view showing the state of use of the first embodiment of the prestressed anchor pad of the present invention;

Figure 6 is a front elevational view showing a second embodiment of the prestressed anchor pad of the present invention;

Figure 7 is a cross-sectional view taken along line C-C of Figure 6;

Figure 8 is a front elevational view showing a third embodiment of the prestressed anchor pad of the present invention;

Figure 9 is a cross-sectional view taken along line D-D of Figure 8.

detailed description

As shown in FIG. 1 and FIG. 2, the first embodiment of the prestressed anchor pad of the present invention is composed of a bearing plate 1 having a square plate surface and a collecting pipe 2, and the bearing plate 1 is perpendicular to a circular through hole 3 of the pressure receiving surface, the collecting pipe 2 includes a connecting portion and a tube bundle portion 4 coaxial with the through hole 3, and the tube bundle portion 4 is fixedly connected to the bearing plate 1 through the connecting portion, and the bearing plate 1 is Made of a metal material suitable for bearing the surface pressure, such as 35# steel, the collecting tube 2 is made of a non-metallic material that can be used as a pipe, such as engineering plastics or glass reinforced plastic. Two annular reinforcing ribs 13 are formed on the outer wall of the tube bundle portion 4.

As shown in FIG. 3 and FIG. 4, the outer end of the through hole 3 is provided with a stepped hole 9 having a hole diameter slightly larger than the through hole 3. The inner plate surface of the pressure receiving plate 1 is provided with a boss 11 surrounding the through hole 3, and is convex. A groove 12 is formed in the side wall of the table 11. The connecting portion of the collecting pipe 2 comprises an edge portion 7 wrapped in the inner surface of the bearing plate 1, the outer plate surface and the periphery of the plate surface; further comprising an extending portion 8 attached to the inner wall of the through hole 3, the inner end of the extending portion 8 and The tube bundle portion 4 is integrally formed, and the outer end of the extension portion 8 is fitted in the stepped hole 9; and includes a snap ring 10, one end of the snap ring 10 is integrally formed with the tube bundle portion 4, and the other end of the snap ring 10 is disposed in the groove 12, the tube bundle portion 4 and the pressure receiving plate 1 are tightly connected by the above three portions. The pressure receiving plate 1 is provided with a grouting hole 5, and the collecting pipe 2 further comprises a grouting pipe 6, one end of the grouting pipe 6 is connected with the beading section 7, and is connected with the grouting hole 5, and the grouting pipe 6 is The other end is in communication with the central portion of the tube bundle portion 4. On the plate surface of the bearing plate 1, three connection holes 14 for fixing to the beam plate are also opened.

As shown in Fig. 5, the use process of the prestressed anchor mainly includes the following steps: First, before casting the concrete beam plate, the prestressed anchor plate and the reinforcing spiral steel 16 are respectively fixed at the two ends of the beam plate, Corresponding two tube bundles 4 are fitted with bellows 17, and a plurality of steel strands 18 are inserted into the bearing plate 1, the tube bundle portion 4 and the bellows 17, and the steel strands 18 are twisted by the anchor plates 19 and the clips 20. The two ends are fixed; then, the concrete beam plate is cast; then, the steel wire 18 is pulled by the tensioner, so that the anchor plate applies pressure to the beam plate from both sides, so that the beam plate has a certain curvature; The grouting hole 5 on the pressure plate 1 injects concrete into the tube bundle portion 4 and the bellows 17, and fixes the steel strand 18 in the beam plate. Through the above construction process, the beam plate itself has a certain prestress.

In the first embodiment, the production process of the prestressed anchor pad mainly comprises two steps. First, the bearing plate is processed by precision casting, and then the corresponding injection mold is opened, and the bearing plate is placed in the mold of the injection molding machine. In the injection molding, the manifold and the bearing plate can be combined.

As shown in FIG. 6 and FIG. 7, the second embodiment of the prestressed anchor pad of the present invention differs from the first embodiment in that the collecting pipe 2' is made of a metal material, the tube bundle portion 4' and the bearing plate. The weir is welded, and both ends of the slurry guiding tube 6' are welded to the bearing plate Γ and the tube bundle portion 4', respectively.

As shown in FIG. 8 and FIG. 9, the third embodiment of the prestressed anchor pad of the present invention differs from the first embodiment in that the plate surface of the bearing plate 1 and the through hole 3 have a rectangular cross section in the tube bundle portion. The outer wall of 4 is machined with reinforcing ribs 15, which are used in a manner consistent with the first embodiment.

The embodiments described above are only intended to describe the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various embodiments of the present invention may be made by those skilled in the art without departing from the spirit of the invention. Modifications and improvements are intended to fall within the scope of the invention as defined by the appended claims.

Industrial applicability The prestressed anchor pad of the invention divides the anchor pad into two parts for separate production and assembly, and the production methods used are all mature existing technologies, and the cost of the product is large under the premise of ensuring product quality. The reduction of the amplitude, the product is widely used in the field of bridge and highway construction, which can not only ensure the quality and safety of the construction project, but also avoid unnecessary resource consumption, so it has great market prospect and strong industrial applicability. .

Claims

Rights request

A prestressed anchor pad plate, characterized in that: a pressure receiving plate (1) and a collecting pipe (2) are two parts, and the bearing plate (1) is provided with a passage perpendicular to the bearing surface a hole (3), the collecting pipe (2) comprising a connecting portion and a tube bundle portion (4) coaxial with the through hole (3), the tube bundle portion (4) passing through the connecting portion and the bearing plate (1) A fixed connection is made, the pressure receiving plate (1) is made of a metal material suitable for receiving the pressure of the surface of the plate, and the collecting pipe (2) is made of a non-metal material or a metal material which can be used as a pipe material.

2. The prestressed anchor pad according to claim 1, wherein: the bearing plate (1) is provided with a grouting hole (5), and the collecting pipe (2) further comprises a slurry guiding pipe (6) One end of the slurry guiding tube (6) is in communication with the grouting hole (5), and the other end of the guiding slurry tube (6) is in constant communication with the middle portion of the tube bundle portion (4).

3. The prestressed anchor pad according to claim 2, wherein: the collecting pipe (2') is made of a metal material, and the pipe bundle portion (4') is welded to the bearing plate (Γ). The two ends of the slurry guiding tube (6') are respectively welded to the bearing plate (Γ) and the tube bundle portion (4').

The prestressed anchor pad according to claim 2, wherein: the collecting pipe (2) is made of a non-metallic material, and the connecting portion is wrapped around the surface of the bearing plate (1) The edge section (7).

The prestressed anchor pad according to claim 4, wherein the connecting portion comprises an extending portion (8) attached to an inner wall of the through hole (3), and one end of the through hole (3) is provided There is a stepped hole (9) having a hole diameter slightly larger than the through hole (3), the inner end of the extended section (8) is integrally connected with the tube bundle portion (4), and the outer end of the extended section (8) is fitted to the stepped hole (9) Inside.

The prestressed anchor pad according to claim 4, wherein: the connecting portion comprises a snap ring (10), and the plate surface of the bearing plate (1) is provided with a surrounding through hole (3) a boss (11), a groove (12) is defined in a sidewall of the boss (11), and one end of the snap ring (10) is integrally connected with the tube bundle portion (4), and the snap ring (10) The other end is placed in the recess (12).

The prestressed anchor pad according to any one of claims 1 to 6, characterized in that the outer wall of the tube bundle portion (4) is provided with at least one annular reinforcing rib (13).

The prestressed anchor pad according to any one of claims 1 to 6, characterized in that: the plate surface of the bearing plate (1) is rectangular, and the plate surface of the bearing plate (1) is provided with a plurality of Connection hole (14).

The prestressed anchor pad according to any one of claims 1 to 6, characterized in that the through hole (3) and the tube bundle portion (4) have a circular cross section.

The prestressed anchor pad according to any one of claims 1 to 6, characterized in that: the through hole (3) and the tube bundle portion (4) have a rectangular cross section, and the outer wall of the tube bundle portion (4) There are a number of reinforcing ribs (15).