Counter-force support ring for pull-out test

Abstract

The utility model discloses a counter-force support ring for a pull-out test, and belongs to the technical field of constructional engineering detection. The counter-force supporting ring comprises a supporting plate and a support, the supporting plate is a round high-strength metal plate, a center hole is formed in the center of the supporting plate, and a plurality of fan-shaped holes are evenly formed in the outer side of the center hole. The supports are symmetrically arranged on the edge of the supporting plate and used for erecting the supporting plate. During use, a detected post-anchoring component penetrates into the center hole of the supporting plate, and if other non-detected post-anchoring components exist on the periphery, the supporting plate is rotated and penetrates into the fan-shaped hole; and the support can avoid the concave-convex part on the uneven detection surface, so that stable support is realized. The counter-force supporting ring is suitable for a detection area where the number of embedded steel bars is large and dense, and can meet the requirements for detection of plane components and detection of cambered surface components. The counter-force supporting ring is light and easy to carry and can adapt to complex detection terrains, and the utilization rate of the counter-force supporting ring can be effectively improved through the supports arranged on the two faces.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering detection, in particular to a reaction force support ring used for anti-pulling test of rear anchoring components of concrete structures. Background Art

[0002] In the construction process, the rebar pull-out test is a routine and high-frequency test item. Generally, 48-72 hours after the rebar construction is completed, the rebar pull-out test can be carried out using a rebar pull-out instrument. The technical regulations for post-anchoring of concrete structures stipulate that the inner diameter of the support ring should not be less than the larger value of 12 times the diameter of the post-anchor component and 250mm. A reaction support ring that meets the relevant requirements can ensure that the load direction of the post-anchor component during the pull-out test is always consistent with the axial direction of the post-anchor component, and at the same time avoid the jack directly acting on the base of the post-anchor component to improve the accuracy of the test. However, in the actual detection application process, the currently used support ring is not completely applicable under complex on-site detection conditions. For example, the surface of the anchoring matrix is ​​uneven, which causes a gap between the contact surface of the support ring and the matrix, causing the support ring to shake, affecting the detection results; for example, there are a large number of densely planted bars in a certain structural column or filling wall. When testing one of the planted bars, it is generally not possible to penetrate the support ring due to the influence of other planted bars. Other planted bars need to be cut off before testing, which affects the on-site construction. Therefore, it is necessary to make a new type of support ring to meet the complex and changeable on-site detection environment, and it is also light and easy to carry. Utility Model Content

[0003] The utility model aims to provide a novel reaction force support ring for pull-out test, so as to meet the complex and changeable detection environment of rear anchoring components on site and meet the requirements of being light and easy to carry.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the utility model is: a reaction force support ring for a pulling test, comprising a support plate and a support, wherein the support plate is a circular high-strength metal plate (such as a steel plate), a center hole is provided in the center of the support plate, and a plurality of fan-shaped holes are evenly opened on the outside of the center hole; the support is symmetrically arranged at the edge of the support plate for erecting the support plate.

[0005] As a preferred implementation, six fan-shaped holes are evenly distributed on the support plate, the fan-shaped holes are cocentric with the central hole, and the central angle θ corresponding to the fan-shaped holes is 30°.

[0006] In some embodiments of the utility model, the radius of the support plate is 125mm and the thickness is 25mm; the radius of the center hole is 30-40mm; the fan-shaped hole is concentric with the center hole, and the inner arc width between the fan-shaped hole and the center hole is 10-15mm, and the outer arc width between the fan-shaped hole and the edge of the support plate is 10-15mm.

[0007] As a preferred embodiment, in order to meet the requirements of complex detection environment and reduce the weight of the reaction force support ring, the arc surface is cut off on the opposite sides of the support plate to form a plane structure (see Figure 1 and Figure 2 ).

[0008] Furthermore, the reaction force support ring also includes a handle for easy placement and carrying. The handle is fixedly connected to the support plate, preferably fixedly connected to a side plane of the support plate. Generally, the handle is a plastic handle to reduce weight.

[0009] As a preferred embodiment, the support is four symmetrically distributed support. In some embodiments of the present invention, the support is an arc-shaped support member extending from the edge of the support plate to both the upper and lower surfaces, and the support and the support plate can be integrally formed.

[0010] In the reaction force support ring of the utility model, the support plate is a flat plate structure, which is intended to provide a wide reaction force contact surface to balance and disperse the load, and is made of high-strength metal material to ensure that it can withstand a large load. Preferably, the support is provided with support members on both sides of the support plate, and the support members connect the support plate with the beam, column or other parts of the structure, and extend from the edge of the support plate. Its function is to provide stable support under various conditions, and the material is the same as that of the support plate to ensure the overall stability and reliability of the system.

[0011] The working principle and workflow of the utility model are as follows: During the use of the reaction support ring of the utility model, the user inserts the inspected rear anchor component into the center hole of the support plate. If there are other non-inspected rear anchor components around the inspected rear anchor component, the support plate can be rotated to insert the non-inspected components into the fan-shaped hole. If the flatness of the test surface is not ideal, the non-continuous support can largely avoid the concave and convex parts on the test surface. After placing the reaction support ring, place the jack of the puller on the reaction support ring, pass the embedded steel bar through the hole in the middle of the jack piston rod, then install the anchor, fix the embedded steel bar to the jack, and start the pull-out test.

[0012] The reaction force support ring of the utility model is more suitable for detection areas with a large number of densely planted rebars, and can meet the detection requirements of both flat components and curved components. The support plate of the reaction force support ring is preferably made of high-strength steel plate and is hollowed out. The support is in a one-by-one manner, which is not only lighter and easier to carry, but also more adaptable to complex detection terrain. Furthermore, the support adopts a double-sided setting, which more effectively improves the utilization rate of the reaction force support ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of the reaction force support ring of the utility model.

[0014] Figure 2 It is a plan view of the reaction force support ring of the utility model.

[0015] Figure 3 for Figure 2 Section view along the AA line. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described in detail below by way of embodiments in conjunction with the accompanying drawings. The accompanying drawings are all simplified schematic diagrams, illustrating the basic structure of the utility model in a schematic manner, and therefore only show the components directly related to the utility model.

[0017] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "inside", "outside", "vertical", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They do not indicate or imply that the device or component referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0019] A reaction support ring for pull-out testing, such as Figure 1 As shown, it mainly includes two parts: support plate 1 and support 2. Figure 2 and Figure 3The support plate 1 is a circular steel plate with a radius of R1=125mm, a thickness of H1=25mm, and a material of Q550. A center hole 11 is provided in the center of the support plate 1, and six fan-shaped holes 12 are evenly opened on the outside of the center hole 11. The radius of the center hole 11 is R2=37mm. The fan-shaped hole 12 is concentric with the center hole 11, and the degree of the central angle θ corresponding to the fan-shaped hole is 30°. The radius of the sector where the fan-shaped hole 12 is located is R3=115mm, and the inner arc width between the fan-shaped hole 12 and the center hole 11 is L3=10mm, and the outer arc width between the fan-shaped hole 12 and the edge of the support plate 1 is L4=10mm, and R3+L4=R1. The support 2 is arranged at the edge of the support plate 1, such as Figure 1 and Figure 3 As shown, four arc-shaped supports 2 are symmetrically arranged on the edge of the support plate 1, and the height of the supports 2 above the upper and lower surfaces of the support plate 1 is H2 = 20 mm, and the width is L4 = 10 mm. The supports 2 and the support plate 1 are integrally formed. Figure 3 In the figure, L1 is the diameter of the support plate 1, L1=2*R1=250 mm; L2 is the diameter of the center hole 11, L2=2*R2=74 mm; H1 is the thickness of the support plate, H1=25 mm.

[0020] like Figure 2 As shown, in order to meet complex detection conditions and further reduce the weight of the reaction force support ring, the two sides of the support plate 1 are symmetrically arranged into planes, that is, the arc surfaces on the opposite sides of the support plate 1 are cut off to make planes, and the distance between the two planes is L5 = 216.95mm.

[0021] Furthermore, in order to facilitate taking, placing and carrying, a plastic handle 3 is provided on the plane of one side of the support plate 1 (see Figure 1 and Figure 2 ).

[0022] When the reaction support ring is in use, the user holds the handle 3 and inserts the inspected rear anchor member into the center hole 11. If there are other non-inspected rear anchor members around the inspected rear anchor member, the support plate 1 can be rotated to insert the non-inspected members into the fan-shaped hole 12. If the flatness of the test surface is not ideal, the four discontinuous supports 2 can largely avoid the concave and convex parts on the test surface. After placing the reaction support ring, place the jack of the puller on the reaction support ring, pass the embedded steel bar through the hole in the middle of the jack piston rod, then install the anchor, fix the embedded steel bar to the jack, and start the pull-out test.

[0023] The description of the above embodiments is only used to help understand the structure and core idea of ​​the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Various equivalent modifications or substitutions made without violating the spirit of the utility model are included in the scope defined by the attached claims.

Claims

1. A reaction force support ring for a pull-out test, comprising a support plate and a support, characterized in that: The support plate is a circular high-strength metal plate with a center hole at the center of the support plate and multiple fan-shaped holes evenly opened outside the center hole; the supports are symmetrically arranged at the edge of the support plate for erecting the support plate.

2. The reaction force support ring according to claim 1, characterized in that: Six fan-shaped holes are evenly distributed on the support plate. The fan-shaped holes are cocentric with the central hole, and the degree of the central angle θ corresponding to the fan-shaped holes is 30°.

3. The reaction force support ring according to claim 1, characterized in that: The support plate has a radius of 125 mm and a thickness of 25 mm; The radius of the central hole is 30-40 mm.

4. The reaction force support ring according to claim 3, characterized in that: The fan-shaped hole is cocentric with the central hole, the width of the inner arc section between the fan-shaped hole and the central hole is 10-15 mm, and the width of the outer arc section between the fan-shaped hole and the edge of the support plate is 10-15 mm.

5. The reaction force support ring according to claim 1, characterized in that: The reaction force support ring includes a handle, and the handle is fixedly connected to the support plate.

6. The reaction force support ring according to claim 1, characterized in that: The support plate is cut off from part of the arc surface on two opposite sides to form a plane structure.

7. The reaction force support ring according to claim 6, characterized in that: The reaction force support ring includes a handle, which is fixedly connected to a side plane of the support plate.

8. The reaction force support ring according to claim 1, characterized in that: The supports are four symmetrically distributed supports arranged at intervals.

9. The reaction force support ring according to claim 1, characterized in that: The support is an arc-shaped support member extending from the edge of the support plate to both the upper and lower surfaces.

10. The reaction force support ring according to claim 9, characterized in that: The support seat and the support plate are integrally formed.

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