Steel bar anchoring structure

Abstract

The utility model provides a reinforcing steel bar anchoring structure which comprises an anchoring part and a reinforcing steel bar clamping part, the reinforcing steel bar clamping part comprises at least two clamping pieces used for being clamped and positioned outside a reinforcing steel bar, and the inner wall of each clamping piece is provided with a positioning groove matched with an outer protruding rib pattern on the outer wall of the reinforcing steel bar. The outer wall of each clamping piece is spirally connected to one end of the anchoring part, and when each clamping piece is clamped outside a reinforcing steel bar and is spirally matched with one end of the anchoring part, the reinforcing steel bar is clamped and limited between the anchoring part and the reinforcing steel bar clamping piece, so that the rapid connection of the reinforcing steel bar and the anchoring part is realized. According to the reinforcing steel bar anchoring structure, the reinforcing steel bar and the anchoring plate can be rapidly installed, the operation process is simple and efficient, the construction period is shortened, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel bar anchoring technology, and more specifically, to a steel bar anchoring structure. Background Technology

[0002] The Association of State Highway and Transportation Authorities (AASHTO) guidelines state that the bond anchorage strength of stainless steel reinforced concrete is lower than that of ordinary reinforced concrete. This is because ordinary steel bars exhibit slight corrosion, increasing surface friction and the mechanical interlocking force between the steel and concrete. Therefore, the anchorage length of stainless steel bars must be greater than that of ordinary reinforced concrete. However, the anchorage length is limited by the dimensions of the structure, and excessive length can lead to increased structural weight, reduced economic efficiency, and steel bar congestion.

[0003] According to relevant test results, compared with ordinary steel bar pull-out specimens, the ultimate bond strength of stainless steel bar pull-out specimens is slightly lower than that of ordinary steel bar pull-out specimens. This indicates that the bonding performance of stainless steel bars is slightly worse than that of ordinary steel bars, mainly because the surface of stainless steel bars is smoother than that of ordinary steel bars.

[0004] In reinforced concrete structures, effective anchorage of reinforcing bars in the concrete is a prerequisite for achieving the structural performance of reinforced concrete. Traditional methods of reinforcing bar anchorage include setting 90° or 135° hooks at the ends of the reinforcing bars, welding anchor bars to one or both sides, and perforated plug-welded anchor plates. Among these methods, setting 90° or 135° hooks at the ends of the reinforcing bars and welding anchor bars to one or both sides can lead to problems such as waste of anchoring reinforcing bars, bar congestion, inconvenient installation, and difficulty in controlling the quality of concrete pouring. Perforated plug-welded anchor plates have low levels of industrialization, low construction efficiency, difficulty in quality control, and cause environmental pollution.

[0005] Therefore, it is necessary to design a completely new steel reinforcement anchorage structure to solve the technical problems. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to overcome at least one of the defects of the above-mentioned related technologies and provide a steel bar anchoring structure that can realize the rapid installation of steel bars and anchoring plates, with a simple and efficient operation process, shortening the construction period and reducing labor costs.

[0007] The technical solution of this utility model is to provide a rebar anchoring structure, including an anchor and a rebar clamping member. The rebar clamping member includes at least two clamping plates for clamping and positioning the rebar outside. Each clamping plate has a positioning groove on its inner wall that matches the outward convex ribs on the outer wall of the rebar. The outer wall of each clamping plate is spirally connected to one end of the anchor. When each clamping plate is clamped to the outside of the rebar and spirally engaged with one end of the anchor, the rebar is clamped and limited between the anchor and the rebar clamping member, thereby realizing a quick connection between the rebar and the anchor.

[0008] Preferably, the clamping pieces are two semi-circular pieces, which together form a circular positioning sleeve. The inner wall of the positioning sleeve clamps and positions the outer wall of the reinforcing bar, and the outer peripheral wall of the positioning sleeve is spirally fitted to one end of the anchor.

[0009] As an improvement, the connection length between the clamping plate and the reinforcing bar is at least twice the diameter of the reinforcing bar.

[0010] In a further improvement, the anchor includes a connecting sleeve, one end of which has a threaded hole, the outer peripheral wall of the positioning sleeve is helically fitted into the threaded hole, and the other end of the connecting sleeve is connected to a first anchor plate.

[0011] In a further improvement, the first anchoring plate can be any one of a circle, an ellipse, a frustum, or a rectangle.

[0012] In a further improvement, a reinforcing anchor sleeve is fitted onto the outside of the connecting sleeve. Multiple bolts are spirally fitted onto the outer peripheral wall of the reinforcing anchor sleeve. Multiple connecting holes are provided on the outer peripheral wall of the connecting sleeve. The inner ends of each bolt pass through the corresponding connecting holes and are radially pressed and limited against the outer wall of each clamping piece. Alternatively, multiple through holes are provided on the outer peripheral wall of the reinforcing anchor sleeve, and bolts pass through each through hole. Multiple threaded through holes are provided on the outer peripheral wall of the connecting sleeve, and the inner ends of each bolt are threaded into the corresponding threaded holes, with the ends of each bolt radially pressed and limited against the outer wall of each clamping piece.

[0013] In a further improvement, the connecting hole is a threaded through hole that mates with the threaded part of the bolt.

[0014] In a further improvement, the two ends of the reinforced anchor sleeve are provided with a second anchor plate that is symmetrical along its axial direction and is in the shape of a frustum.

[0015] In summary, compared with related technologies, the steel reinforcement anchoring structure of this utility model has the following advantages:

[0016] Firstly, in application, the anchoring structure of this application uses split rebar clamps spliced ​​together on the outer side of the top of the rebar to form a connecting fastener. The connecting fastener and the anchor are spirally engaged to form an anchoring assembly. The rebar clamp includes at least two clamping plates, and the inner wall of the clamping plates is also provided with positioning grooves. When the rebar is subjected to axial tensile force opposite to the direction of the anchor, the rebar transmits the tensile force to the connecting fastener through the outward convex ribs on the surface of the rebar. The connecting fastener transmits the external force to the anchor through the mechanical biting force of the threads. The anchoring assembly is cast into the concrete structure and acts as a tensile anchoring node. This method of using an arc-shaped clamping plate structure to quickly clamp and fix the rebar and the anchor is simple and efficient in operation, shortens the construction period, and reduces labor costs.

[0017] Secondly, by adding a reinforcing anchor sleeve outside the connecting sleeve of the anchor, and setting multiple circumferentially distributed bolts on the side wall of the reinforcing anchor sleeve, the bolts pass through the side wall of the connecting sleeve and are pressed against the outer side wall of the clamping plate, further strengthening the clamping and limiting between the clamping member and the reinforcing bar, and effectively improving the connection strength between the reinforcing bar and the anchor.

[0018] Furthermore, frustum-shaped anchor plates are installed at both ends of the reinforced anchor sleeve, and the ends of the anchors are also frustum-shaped anchor plates. This increases the actual bearing area of ​​the frustum-shaped anchor device and the concrete, resulting in a certain increase in strength under stress and enhancing anchor stability.

[0019] Other improvements and advantages of this invention will be set forth in the detailed description that follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the steel bar anchoring structure and the steel bar connection of this utility model;

[0021] Figure 2 for Figure 1 Exploded view of the steel reinforcement anchorage structure and the steel reinforcement connection structure.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Clamping plate; 2. Positioning groove; 3. Connecting sleeve; 4. Threaded hole; 5. First anchoring plate; 6. Reinforcing anchoring sleeve; 7. Bolt; 8. Second anchoring plate; 9. Reinforcing bar. Detailed Implementation

[0024] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0026] In this embodiment of the utility model, unless otherwise explicitly specified and limited, the first feature at the "upper end" or "lower end" of the second feature may be in direct contact with the first feature, or indirect contact with the first feature through an intermediate medium. Moreover, the first feature at the "lower end" or "lower side" of the second feature may be directly below or diagonally below the second feature, or simply indicate that the horizontal height of the first feature is less than that of the second feature.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] See Figures 1-2 As shown, this utility model embodiment discloses a steel bar anchoring structure for anchoring steel bar 9 to concrete. It includes an anchor and a steel bar 9 clamping member. The steel bar 9 clamping member includes at least two clamping plates 1 for clamping and positioning on the outside of the steel bar 9. Each clamping plate 1 has a positioning groove 2 on its inner wall that matches the outward convex rib pattern on the outer wall of the steel bar 9. The outer wall of each clamping plate 1 is spirally connected to one end of the anchor to achieve the connection between the steel bar 9 and the anchor.

[0029] In this structure, the split clamping plates 1 are used to clamp the outside of the reinforcing bar 9. The inner walls of the multiple clamping plates 1 are provided with positioning grooves 2 that match the ribs on the outside of the reinforcing bar 9, which effectively increases the axial friction. Furthermore, the anchor is installed into the outside of the clamping plates 1 in a spiral manner, which can achieve quick installation and fixation of the reinforcing bar 9 and the anchor without the need for additional fasteners. This makes installation convenient and improves efficiency.

[0030] See Figure 2In this embodiment, as a preferred structure, the clamping plates 1 are two semi-circular pieces, which together form a circular positioning sleeve. That is, the two clamping plates 1 are formed by splitting a complete sleeve in half axially. The inner wall of the positioning sleeve clamps and positions the outer wall of the reinforcing bar 9, and the outer peripheral wall of the positioning sleeve is screwed onto one end of the anchor. More specifically, to further increase the clamping force of the clamping plates 1 on the reinforcing bar 9, structural adhesives such as threadlocker can be injected between the reinforcing bar 9 and the clamping plates 1, or a flexible rubber membrane can be added to the inner wall of the two clamping plates 1. This increases the radial clamping force acting on the outer surface of the reinforcing bar 9 after the clamping plates are threaded onto the anchor, thereby improving the axial tensile strength of the reinforcing bar 9 after it is fixed to the anchor.

[0031] In addition, in the above structure, the connection length between the clamping piece 1 and the reinforcing bar 9 is at least twice the diameter of the reinforcing bar 9 to ensure sufficient clamping and engagement length, increase the axial tensile force after the reinforcing bar 9 is fixed to the anchor, and prevent the reinforcing bar 9 from detaching from the anchor.

[0032] In this embodiment, preferably, the anchor includes a connecting sleeve 3, one end of which is provided with a threaded hole 4, and the outer walls of the two clamping plates 1 are provided with internal threads, that is, the positioning sleeve and the connecting sleeve 3 are threadedly engaged; the other end of the connecting sleeve 3 is connected to a first anchoring plate 5.

[0033] The first anchor plate 5 can be any one of the following shapes: circular, elliptical, frustum, or rectangular. According to relevant experimental results, under the same conditions, the anchoring capacity of a frustum-shaped anchor plate > an elliptical anchor plate > a circular anchor plate. When the reinforcing bar 9 bears the same load, the frustum-shaped anchor plate can effectively shorten the required anchoring length of the reinforcing bar 9, saving reinforcing bar 9. Simultaneously, it can overcome the shortcomings of traditional hooked reinforcing bars 9, such as anchoring congestion and inconvenient construction, improving project quality and ensuring the overall stability of the structure. Therefore, in this embodiment, the preferred first anchor plate 5 is a frustum-shaped structure, with the inclined surface of the frustum-shaped structure close to the side of the connecting sleeve 3, and the inclined surface having a 45° slope angle. This increases the actual bearing area of ​​the frustum-shaped anchor structure and the concrete, resulting in a certain increase in strength under stress and enhancing anchoring stability. Furthermore, in this structure, the thickness of the frustum-shaped first anchor plate 5 is not less than the nominal diameter of the reinforcing bar 9; the bearing area of ​​the frustum-shaped first anchor plate 5 is not less than nine times the nominal area of ​​the reinforcing bar 9.

[0034] More specifically, in this embodiment, a reinforcing anchor sleeve 6 is also fitted outside the connecting sleeve 3. Multiple radially extending bolts 7 are spirally fitted onto the outer peripheral wall of the reinforcing anchor sleeve 6. Multiple connecting holes are provided on the outer peripheral wall of the connecting sleeve 3. The inner end of each bolt 7 passes through the corresponding connecting hole and radially abuts and limits itself against the outer wall of each clamping piece 1, increasing the mechanical interlocking force between the clamping piece 1 and the reinforcing bar 9. Preferably, the connecting hole is a threaded through hole that mates with the threaded bolt 7, meaning the bolt 7 simultaneously mates with both the reinforcing anchor sleeve 6 and the connecting sleeve 3. This results in a higher connection strength, meaning the radial force applied to the outer wall of the clamping piece 1 is more stable, ultimately ensuring the strength of the connection structure between the reinforcing bar 9 and the anchor.

[0035] In this embodiment, preferably, there are at least four bolts 7, which are evenly distributed in the circumferential direction to better provide radial loading force for the two clamping plates 1. This is because when the number of bolts 7 is insufficient, the two clamping plates 1 cannot guarantee whether the inner end of the bolts 7 can be fully pressed against the outer wall of the clamping plate after being threaded into the connecting sleeve 3.

[0036] In some other embodiments, if the force is guaranteed, a threaded hole 4 can be provided on the side wall of the connecting sleeve 3, and a through hole can be opened on the side wall of the reinforcing anchor sleeve 6. After the bolt 7 passes through the through hole, it is threaded and connected to the side wall of the connecting sleeve 3, and the inner end of the bolt 7 is pressed against the outer wall of the clamping piece 1.

[0037] More specifically, in the above structure, at both ends of the reinforcing anchor sleeve 6, there are second anchor plates 8 that are symmetrical along their axis and are in the shape of a frustum. Similarly, the inclined surfaces of the two second anchor plates 8 are located close to each other in the two components, and the inclined surfaces have a slope angle of 45°, which increases the contact area between the second anchor plates 8 and the concrete after pouring and increases the bearing capacity.

[0038] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "end", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0039] In the description of this utility model, the reference to terms such as "this embodiment," "some embodiments," etc., indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A reinforcing bar anchoring structure, characterized by: The device includes an anchor and a rebar clamp. The rebar clamp includes at least two clamping pieces (1) for clamping and positioning the rebar (9) outside. Each clamping piece (1) has a positioning groove (2) on its inner wall that matches the outward convex ribs on the outer wall of the rebar (9). The outer wall of each clamping piece (1) is spirally connected to one end of the anchor. When each clamping piece (1) is clamped to the outside of the rebar (9) and spirally engaged with one end of the anchor, the rebar is clamped and limited between the anchor and the rebar clamp, so as to realize the quick connection between the rebar (9) and the anchor.

2. The reinforcement anchoring structure according to claim 1, characterized in that: The clamping pieces (1) are two semi-circular pieces, and the two clamping pieces (1) together form a circular positioning sleeve. The inner wall of the positioning sleeve is clamped and positioned on the outer wall of the reinforcing bar (9), and the outer peripheral wall of the positioning sleeve is spirally fitted to one end of the anchor.

3. A reinforcement anchoring structure according to claim 1 or 2, characterized in that: The connection length between the clamping plate (1) and the reinforcing bar (9) is at least twice the diameter of the reinforcing bar (9).

4. The reinforcement anchoring structure according to claim 2, characterized in that: The anchor includes a connecting sleeve (3), one end of which is provided with a threaded hole (4), the outer peripheral wall of the positioning sleeve is helically fitted in the threaded hole (4), and the other end of the connecting sleeve (3) is connected to a first anchor plate (5).

5. The reinforcement anchoring structure according to claim 4, characterized in that: The first anchor plate (5) can be any one of a circle, an ellipse, a frustum, or a rectangle.

6. A reinforcement anchoring structure according to claim 4 or 5, characterised in that: The connecting sleeve (3) is fitted with a reinforcing anchor sleeve (6). Multiple bolts (7) are spirally fitted on the outer peripheral wall of the reinforcing anchor sleeve (6). Multiple connecting holes are provided on the outer peripheral wall of the connecting sleeve (3). The inner end of each bolt (7) passes through the corresponding connecting hole and is radially pressed against and limited on the outer wall of each clamping piece (1). Alternatively, multiple through holes are provided on the outer peripheral wall of the reinforcing anchor sleeve (6), and bolts (7) are inserted into each through hole. Multiple threaded through holes are provided on the outer peripheral wall of the connecting sleeve (3). The inner end of each bolt (7) is threaded into the corresponding threaded hole (4), and the end of each bolt (7) is radially pressed against and limited on the outer wall of each clamping piece (1).

7. The reinforcement anchoring structure according to claim 6, characterized in that: The connecting hole is a threaded through hole that mates with the thread of the bolt (7).

8. The reinforcement anchoring structure according to claim 6, characterized in that: The reinforced anchor sleeve (6) is provided with a second anchor plate (8) at both ends, which is symmetrical along its axis and in the shape of a frustum.

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