Cross type anchoring part for thin-wall structure

Abstract

The utility model discloses a cross-type anchoring part for a thin-wall structure, which comprises an anchoring plate, a plurality of cross-distributed anchoring holes, a plurality of cross-shaped anchoring holes and a plurality of cross-shaped anchoring holes, the plurality of wedge-shaped clamping blocks are respectively arranged in the plurality of groups of anchoring holes; the pressure-bearing body is kept in contact with one end face of the anchoring plate, the pressure-bearing body is provided with a cavity for one ends of the multiple prestressed tendons to penetrate through, the other ends of the multiple prestressed tendons penetrate through the multiple wedge-shaped clamping blocks respectively, in the tensioning process, the anchoring holes are matched with the wedge-shaped clamping blocks, and radial extrusion force is applied to the wedge-shaped clamping blocks through the hole walls. According to the utility model, the structure is simple, the plurality of anchoring holes in the anchoring plate are arranged in a crossed manner, compared with the traditional linear arrangement, the crossed arrangement obviously shortens the distribution range of the horn-shaped holes along the length direction, the convenience of installation and construction is improved, in addition, the crossed arrangement of the anchoring holes also reduces the break angles of the prestressed tendons, and the construction efficiency is improved. And stress loss and potential safety hazards are reduced, and the construction requirement of a prestressed anchoring system in a concrete thin-wall structure is met.

Description

Technical Field

[0001] This utility model relates to the field of anchor technology, specifically a cross-type anchor for thin-walled structures. Background Technology

[0002] In prestressed concrete structures, prestressed anchors are typically used to anchor the prestressing tendons in order to establish an anchoring system. Among these, wedge-shaped block anchors are the most widely used due to their unique trapezoidal wedge-shaped structure and anchor plate design with flared holes. However, in the application scenarios of thin-walled concrete structures, this traditional anchor faces a series of challenges.

[0003] Thin-walled structures refer to structural types with relatively thin concrete layers, commonly found at the edges of simply supported beams and in large-span buildings. As bridge and building structures evolve towards lighter, thinner, and stronger designs, the application of thin-walled structures is continuously expanding. However, the characteristics of thin-walled structures impose special requirements on prestressed anchorage systems: smaller anchors are needed to avoid occupying excessive cross-sectional dimensions, thus ensuring that the strength of the edge concrete is not affected.

[0004] Specifically, existing technologies face the following problems:

[0005] Traditional circular wedge-shaped anchors are unsuitable for thin-walled structures due to their large cross-sectional dimensions. The corresponding embedded pipe diameters are also large, resulting in excessive vertical dimensions in thin-walled structures. This reduces the remaining thickness on both sides of the anchoring system, thus affecting structural strength. Conventional flat anchors use a linear arrangement of trumpet-shaped holes, wedge-shaped blocks, and prestressing tendons within the holes, leading to significant frictional losses. Particularly in thin-walled structures, the limited width of the prestressing tendons easily creates large bends at the starting point of the embedded pipe, increasing the risk of frictional losses and potentially causing prestressing tendon breakage. To accommodate the thickness requirements of thin-walled structures, existing anchors tend to use fewer holes, directly reducing anchoring strength and failing to meet the needs of high-strength designs. Therefore, a cross-type anchor for thin-walled structures is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a cross-type anchor for thin-walled structures to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a cross-type anchor for thin-walled structures, comprising:

[0008] Anchor plate with multiple sets of cross-arranged anchor holes;

[0009] Several wedge-shaped clamps are respectively set inside multiple sets of anchor holes; and

[0010] A pressure-bearing body that maintains contact with one end face of the anchor plate, the pressure-bearing body having a cavity through which one end of multiple prestressing tendons passes, and the other end of the multiple prestressing tendons passing through multiple wedge-shaped clamps respectively. During the tensioning process, the anchor hole and the wedge-shaped clamps cooperate, and the radial extrusion force is applied to the wedge-shaped clamps through the hole wall, so that the wedge-shaped clamps bite and anchor the prestressing tendons.

[0011] As a further embodiment of this utility model: a pre-embedded pipe is installed on the end face of the pressure-bearing body away from the anchor plate.

[0012] As a further embodiment of this utility model: the pressure-bearing body includes a pressure-bearing platform and a flat hollow pipe, the pressure-bearing platform is connected to an anchor plate, and the flat hollow pipe is connected to a pre-embedded pipe.

[0013] As a further embodiment of this utility model: the pressure-bearing platform has two obliquely symmetrical screw holes at diagonal positions, and a threaded through hole is provided at the center of the short side near one of them.

[0014] As a further embodiment of this utility model: the flat hollow pipe includes an integrally formed upper pipe and a lower pipe, and a zigzag hole is provided at the position of the upper pipe near the threaded through hole. The zigzag hole is connected to the threaded through hole through a pipeline.

[0015] As a further embodiment of this utility model: the anchoring hole is composed of a large horn-shaped hole and a small horn-shaped hole, wherein the large horn-shaped hole and the small horn-shaped hole are connected to each other at the end with the smaller opening diameter, and the large horn-shaped hole and the small horn-shaped hole are concentrically arranged.

[0016] As a further embodiment of this utility model: the wedge-shaped clamping block includes symmetrically arranged conical pieces, each of the two conical pieces having a strip groove on its outer arc surface, each of the two conical pieces having oblique threaded teeth on its inner arc sidewall, and each of the two conical pieces having an outwardly expanding flared opening at the end of its inner arc sidewall.

[0017] As a further embodiment of this utility model: a spring ring is provided in the strip groove to fix the two cone plates together.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] In this application, the multiple anchor holes on the anchor plate are arranged in a cross pattern. Compared with the traditional straight-line arrangement, the cross pattern significantly shortens the distribution range of the trumpet holes along the length direction, improving the convenience of installation and construction. In addition, the cross pattern of anchor holes also reduces the bending angle of the prestressing tendons, reduces stress loss and safety hazards, and is more suitable for the construction needs of prestressed anchoring systems in thin-walled concrete structures. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the anchor of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the wedge-shaped clamping block of this utility model;

[0022] Figure 3 This is a schematic diagram of the anchor plate of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the anchor plate of this utility model;

[0024] Figure 5 This is a schematic diagram of the pressure-bearing body of this utility model;

[0025] In the diagram: 1. Prestressed tendon; 2. Wedge-shaped clamp; 2-1. Conical plate; 2-2. Strip groove; 2-3. Oblique threaded teeth; 2-4. Trumpet mouth; 3. Anchor plate; 3-1. Anchor hole; 3-1-1. Large trumpet-shaped hole; 3-1-2. Small trumpet-shaped hole; 4. Pressure-bearing body; 4-1. Pressure-bearing platform; 4-2. Flat hollow pipe; 4-2-1. Upper pipe; 4-2-2. Lower pipe; 4-3. Screw hole; 4-4. Threaded through hole; 5. Reinforcing rib; 6. Embedded pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 In this embodiment of the present invention, a cross-type anchor for a thin-walled structure includes:

[0028] Anchor plate 3 has multiple sets of cross-arranged anchor holes 3-1;

[0029] Several wedge-shaped clamps 2 are respectively set inside multiple sets of anchor holes 3-1; and

[0030] The pressure-bearing body 4 is in contact with one end face of the anchor plate 3. The pressure-bearing body 4 has a cavity through which one end of multiple prestressing tendons 1 passes. The other end of the multiple prestressing tendons 1 passes through multiple wedge-shaped clamps 2 respectively. During the tensioning process, the anchor hole 3-1 cooperates with the wedge-shaped clamps 2 and applies radial extrusion force to the wedge-shaped clamps 2 through the hole wall, so that the wedge-shaped clamps 2 bite and anchor the prestressing tendons 1.

[0031] The outer circumferential surface of the pressure-bearing body 4 is provided with reinforcing ribs 5, which are flat spiral steel bars with a wire diameter of 10mm, and the spiral axis of the reinforcing ribs coincides with the axis of the pressure-bearing body 4.

[0032] Specifically, the anchor plate 3 adopts a rectangular structure with an even number of anchor holes 3-1 arranged in a crisscross pattern. This arrangement has the following advantages compared to the traditional circular or linear arrangement: Firstly, it avoids the problem of large space occupation by circular arrangements, which is beneficial for controlling the width of the anchor plate in thin-walled structures; secondly, compared to linear arrangements, the crisscross arrangement effectively shortens the distribution range of the flared holes along the length direction, improving the convenience of installation and construction.

[0033] Furthermore, the cross-arrangement method can reduce the bend angle of the prestressing tendon 1 at the connection between the anchor plate and the embedded pipe, thereby reducing friction loss and breakage risk caused by the bending of the prestressing tendon. The traditional straight arrangement has a long distribution of trumpet holes, and the corresponding prestressing tendon coverage area is also long. When the diameter of the embedded pipe is limited, it is easy to form a large bend angle at the opening of the anchor plate and the embedded pipe, which can lead to stress loss or even structural safety hazards.

[0034] Meanwhile, the dimensions of the horizontal and vertical distribution areas of the prestressed tendons 1 in the anchor plate 3 match the rectangular openings at the ends of the bearing body 4, enabling automatic alignment during installation without the need for an additional independent alignment structure, thereby simplifying the overall structure and improving construction efficiency.

[0035] Please see Figure 1 In one embodiment, preferably, the end face of the pressure-bearing body 4 away from the anchor plate 3 is equipped with a pre-embedded pipe 6.

[0036] Please see Figure 1 and Figure 5 In one embodiment, preferably, the pressure-bearing body 4 includes a pressure-bearing platform 4-1 and a flat hollow pipe 4-2, the pressure-bearing platform 4-1 being connected to the anchor plate 3, and the flat hollow pipe 4-2 being connected to the pre-embedded pipe 6.

[0037] Please see Figure 5 In one embodiment, preferably, the pressure-bearing platform 4-1 has two obliquely symmetrical screw holes 4-3 at diagonal positions, and a threaded through hole 4-4 is provided at the center of the short side near one side.

[0038] Please see Figure 5In one embodiment, preferably, the flat hollow pipe 4-2 includes an integrally formed upper pipe 4-2-1 and a lower pipe 4-2-2. A zigzag hole is provided in the upper pipe 4-2-1 near the threaded through hole 4-4. The zigzag hole is connected to the threaded through hole 4-4 through a pipe, and the zigzag angle is 120°.

[0039] Please see Figure 3-4 In one embodiment, preferably, the anchoring hole 3-1 is composed of a large horn-shaped hole 3-1-1 and a small horn-shaped hole 3-1-2, wherein the large horn-shaped hole 3-1-1 and the small horn-shaped hole 3-1-2 are interconnected at the end with the smaller opening diameter, and the large horn-shaped hole 3-1-1 and the small horn-shaped hole 3-1-2 are concentrically arranged. Further, the opening diameter of the large horn-shaped hole 3-1-1 away from the small horn-shaped hole 3-1-2 is 27.5 mm and the opening angle is 13°20′, and the opening diameter of the small horn-shaped hole 3-1-2 away from the large horn-shaped hole 3-1-1 is 22 mm and the opening angle is 15°. The large horn-shaped hole 3-1-1 and the small horn-shaped hole 3-1-2 respectively penetrate the two end faces of the anchoring plate 3.

[0040] Please see Figure 2 In one embodiment, preferably, the wedge-shaped clamp 2 includes symmetrically arranged conical pieces 2-1. Each of the two conical pieces 2-1 has a strip groove 2-2 on its outer arc surface. A spring ring is provided within the strip groove 2-2 to fix the two conical pieces 2-1 together. The inner arc sidewalls of each of the two conical pieces 2-1 are provided with oblique threaded teeth 2-3, and the ends of the inner arc sidewalls of each of the two conical pieces 2-1 are provided with outwardly expanding flared openings 2-4. Furthermore, the conical pieces 2-1 are made of high-hardness alloy structural steel, and surface hardening is used to achieve the strength requirements for prestressed tendon interlocking. The contacting end faces of the two conical pieces 2-1 are flat. The strip groove 2-2 has a width of 1.8 mm and a depth of 2 mm, which better accommodates the spring ring inside the strip groove 2-2, realizing the combination of the two conical pieces 2-1. In addition, the depth of the flared opening 2-4 is 8 mm, and the opening angle of the flared opening 2-4 is 5.74°.

[0041] Working principle and usage process of this utility model:

[0042] During installation, reinforcing ribs 5 and bearing bodies 4 are pre-embedded in the thin-walled concrete structure, with their axes coinciding. The bearing body 4 is fixedly installed in the concrete frame structure through screw holes 4-3. The reinforcing ribs 5 are sleeved on the outside of the bearing body 4, and the bearing body 4 is concentrically connected to the pre-embedded pipe 6. Prestressing tendons 1 are threaded side by side through the bearing body 4 and the duct of the thin-walled concrete structure, and then the anchor plate 3 is installed. The end face of the anchor plate 3 is attached to the end face of the bearing platform 4-1 of the bearing body 4. The prestressing tendons 1 are then sequentially threaded through the small trumpet-shaped holes 3-1-2 of the anchor plate 3. The prestressing tendon 1 is inserted through the large trumpet-shaped hole 3-1-1 and exits; the prestressing tendon 1 is inserted between the two cones 2-1 of the wedge-shaped clamp 2, and the wedge-shaped clamp 2 is fitted into the large trumpet-shaped hole 3-1-1 on the end face of the anchor plate 3. During the tensioning process, as the prestressing tendon 1 is tensioned, the wedge-shaped clamp 2 and the large trumpet-shaped hole 3-1-1 gradually engage to form a self-anchor. Since the number of trumpet-shaped holes on both sides of the center line of the end face of the anchor plate 3 is the same and the anchoring force is equal, it can be ensured that the force on both sides of the center line of the anchor plate 3 is uniform during tensioning, so that the force transmitted to the bearing body 4 is also uniform.

[0043] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0044] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A cross-type anchor for thin-walled structures, characterized in that, include: Anchor plate with multiple sets of cross-arranged anchor holes; Several wedge-shaped clamps are respectively set inside multiple sets of anchor holes; as well as A pressure-bearing body that maintains contact with one end face of the anchor plate, the pressure-bearing body having a cavity through which one end of multiple prestressing tendons passes, and the other end of the multiple prestressing tendons passing through multiple wedge-shaped clamps respectively. During the tensioning process, the anchor hole and the wedge-shaped clamps cooperate, and the radial extrusion force is applied to the wedge-shaped clamps through the hole wall, so that the wedge-shaped clamps bite and anchor the prestressing tendons.

2. The cross-type anchor for thin-walled structures according to claim 1, characterized in that, The end face of the pressure-bearing body away from the anchor plate is equipped with a pre-embedded pipe.

3. The cross-type anchor for thin-walled structures according to claim 2, characterized in that, The pressure-bearing body includes a pressure-bearing platform and a flat hollow pipe. The pressure-bearing platform is connected to an anchor plate, and the flat hollow pipe is connected to a pre-embedded pipe.

4. The cross-type anchor for thin-walled structures according to claim 3, characterized in that, The pressure-bearing platform has two obliquely symmetrical screw holes at diagonal positions, and a threaded through hole at the center of the short side near one of them.

5. The cross-type anchor for thin-walled structures according to claim 4, characterized in that, The flat hollow pipe includes an integrally formed upper pipe and a lower pipe. A zigzag hole is provided in the upper pipe near the threaded through hole. The zigzag hole is connected to the threaded through hole through a pipeline.

6. The cross-type anchor for thin-walled structures according to claim 1, characterized in that, The anchoring hole consists of a large horn-shaped hole and a small horn-shaped hole, wherein the large horn-shaped hole and the small horn-shaped hole are connected to each other at the end with the smaller opening diameter, and the large horn-shaped hole and the small horn-shaped hole are concentrically arranged.

7. The cross-type anchor for thin-walled structures according to claim 1, characterized in that, The wedge-shaped clamp includes symmetrically arranged conical pieces. Each of the two conical pieces has a strip groove on its outer arc surface, and each of the two conical pieces has oblique threaded teeth on its inner arc sidewall. The ends of the inner arc sidewalls of the two conical pieces are provided with outwardly expanding flared openings.

8. The cross-type anchor for thin-walled structures according to claim 7, characterized in that, The groove contains a spring ring that holds the two cone-shaped plates together.

Images