Thickness control device for protection layer of reinforcement cage
By setting a combination structure of steel reinforcement cage and concrete limiting blocks on the steel reinforcement cage, the problem of uneven thickness of the protective layer of the steel reinforcement cage is solved, and the construction quality and durability of bridge pile foundation are improved.
Patent Information
- Application Number
- CN202423167239.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In bridge pile foundation construction, uneven thickness of the protective layer of the reinforcing cage can lead to corrosion of the reinforcing bars, affecting the bearing capacity of the pile foundation and the durability of the bridge.
A combination structure of steel reinforcement cage and concrete limiting blocks is adopted. The concrete limiting blocks abut against the inner circumferential wall of the steel casing to control the thickness of the protective layer of the steel reinforcement cage, reduce positioning errors and prevent corrosion of the reinforcing bars.
Ensure the uniformity of the protective layer thickness of the reinforcing cage to improve the construction quality and durability of the pile foundation and avoid the problem of rebar corrosion.
Smart Images
Figure CN223535713U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering construction technology, and in particular to a device for controlling the thickness of the protective layer of a steel cage. Background Technology
[0002] Pile foundations are a common type of foundation used in bridge structures, and their construction quality is a key control point in the project. A pile foundation is a composite material consisting of a reinforcing cage and concrete. The concrete cover of the reinforcing cage refers to the layer of concrete between the outermost edge of the outermost reinforcing bars and the concrete surface after the concrete has been poured. In actual construction, the reinforcing cage is usually lowered into a steel casing first, and then the concrete is poured.
[0003] To ensure the uniformity of the protective layer thickness of the reinforcing cage, a protective layer thickness control device is typically used. The traditional method involves welding radially outward-extending ribs to the reinforcing cage. The length of these ribs is usually equal to the designed protective layer thickness to ensure that the spacing between the reinforcing cage and the concrete surface meets the design requirements after concrete pouring. However, during actual construction, errors such as incorrect cage positioning may result in some ribs not being completely encased in concrete and remaining exposed in moist soil. Prolonged exposure to water and air makes these ribs susceptible to corrosion, which can gradually spread to the main reinforcing bars, reducing the pile foundation's bearing capacity and affecting the bridge's durability and structural safety.
[0004] Therefore, there is an urgent need to propose a device for controlling the thickness of the protective layer of the reinforcing cage in order to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this utility model is to provide a device for controlling the thickness of the protective layer of the reinforcing cage, which helps to ensure the uniformity of the thickness of the protective layer of the reinforcing cage and improves the construction quality and durability of the pile foundation.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] This utility model provides a device for controlling the thickness of the protective layer of a reinforcing cage. The device is disposed between the radial outer side of the reinforcing cage and the inner peripheral wall of the steel casing. The device includes:
[0008] A reinforcing cage includes a first connecting part and a supporting rod. The first connecting part is fixedly connected to the main reinforcing bar of the reinforcing cage and protrudes radially outward relative to the main reinforcing bar. The supporting rod is fixedly connected to the end of the first connecting part away from the main reinforcing bar. The projection shape of the first connecting part along the axial direction of the reinforcing cage is perpendicular to the projection shape of the supporting rod along the axial direction of the reinforcing cage.
[0009] A concrete limiting block is sleeved and connected to the outer periphery of the bearing rod, and the concrete limiting block can abut against the inner peripheral wall of the steel casing.
[0010] In some embodiments, the concrete limiting block is a cylinder, and the concrete limiting block is coaxially arranged with the bearing rod and rotatably connected to the bearing rod. The circumferential surface of the concrete limiting block can roll on the inner circumferential wall of the steel casing.
[0011] In some embodiments, there are two first connecting parts, each of which is connected to two adjacent main reinforcing bars. One first connecting part is connected between one end of the bearing rod and one of the main reinforcing bars, and the other first connecting part is connected between the other end of the bearing rod and another adjacent main reinforcing bar. The concrete limiting block is located between the two first connecting parts.
[0012] In some embodiments, each of the first connecting portions includes a first connecting segment and a second connecting segment, and the first connecting segment, the second connecting segment and the corresponding main rib are arranged to form a triangle.
[0013] In some embodiments, the reinforcing cage further includes a second connecting portion, which is fixedly connected between the bearing rod and the spiral reinforcement of the reinforcing cage.
[0014] In some embodiments, the second connection portion includes a plurality of spaced-apart third connection segments, which are parallel to each other.
[0015] In some embodiments, the second connecting part is welded to the bearing rod and to the spiral rib.
[0016] In some embodiments, the first connecting part is welded to the bearing rod and to the main reinforcing bar.
[0017] In some embodiments, multiple sets of thickness control components are spaced apart along the axial direction of the reinforcing cage, and each set of thickness control components includes multiple reinforcing cage protective layer thickness control devices spaced apart along the circumferential direction of the reinforcing cage.
[0018] In some embodiments, each group of the thickness control components includes four of the steel cage protective layer thickness control devices, which are evenly distributed at intervals.
[0019] The beneficial effects of this utility model are:
[0020] The rebar cage protective layer thickness control device provided by this utility model effectively controls the thickness of the rebar cage protective layer by setting up a rebar skeleton and concrete limiting blocks. The concrete limiting blocks abut against the inner circumferential wall of the steel casing. This design allows the concrete limiting blocks to act as a limit during the lowering of the rebar cage, reducing positioning errors and ensuring uniform thickness of the subsequent rebar cage protective layer. Furthermore, since the concrete limiting blocks are also made of concrete, they do not have the problem of exposed corrosion compared to traditional reinforcing bars, thus effectively improving the construction quality and durability of the pile foundation. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the steel cage protective layer thickness control device provided in this embodiment of the utility model;
[0023] Figure 2 This is a structural schematic diagram of the steel reinforcement cage provided in an embodiment of the present utility model;
[0024] Figure 3 This is a structural schematic diagram of the concrete limiting block provided in an embodiment of the present invention.
[0025] In the picture:
[0026] 1. Reinforcing steel cage; 11. First connecting part; 111. First connecting section; 112. Second connecting section; 12. Bearing rod; 13. Second connecting part; 131. Third connecting section;
[0027] 2. Concrete limiting block;
[0028] 100. Main reinforcement bars;
[0029] 200. Spiral ribs. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they 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 this utility model based on the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0037] like Figures 1-3 As shown, the reinforcement cage protective layer thickness control device provided in this embodiment is disposed between the radial outer side of the reinforcement cage and the inner peripheral wall of the steel casing.
[0038] The device for controlling the thickness of the protective layer of the reinforcing cage includes a reinforcing cage 1 and a concrete limiting block 2.
[0039] The reinforcing cage 1 includes a first connecting part 11 and a bearing rod 12. The first connecting part 11 is fixedly connected to the main reinforcement bar 100 of the reinforcing cage and protrudes radially outward relative to the main reinforcement bar 100. The bearing rod 12 is fixedly connected to the end of the first connecting part 11 away from the main reinforcement bar 100. The first connecting part 11 extends along the axial direction of the reinforcing cage. Figure 1 The projected shape of the support rod 12 (in the X direction) is perpendicular to the projected shape of the support rod 12 along the axial direction of the steel cage. The concrete limiting block 2 is fitted onto the outer periphery of the support rod 12, and the concrete limiting block 2 can abut against the inner circumferential wall of the steel casing. That is: along the radial direction of the steel cage (… Figure 1 (In the Y direction), the thickness of the protective layer of the steel cage is the sum of the dimensions of the steel cage 1 and the dimensions of the concrete limiting block 2 protruding from the bearing rod 12.
[0040] It should be noted that in this embodiment, the main reinforcement 100 and the spiral reinforcement 200 mentioned later are manufactured according to the design drawings. The attached drawings are only for illustration and do not show the full picture.
[0041] The rebar cage protective layer thickness control device provided in this embodiment effectively controls the thickness of the rebar cage protective layer by setting up a rebar skeleton 1 and a concrete limiting block 2. The concrete limiting block 2 abuts against the inner circumferential wall of the steel casing. This design allows the concrete limiting block 2 to act as a limit during the lowering of the rebar cage, reducing positioning errors and ensuring uniform thickness of the subsequent rebar cage protective layer. Furthermore, since the concrete limiting block 2 is also made of concrete, it avoids the problem of exposed corrosion compared to traditional reinforcing bars, thus effectively improving the construction quality and durability of the pile foundation.
[0042] Optionally, the concrete limiting block 2 is a precast concrete test block with the same strength as the pile foundation concrete.
[0043] Optionally, the first connecting part 11 is connected to the bearing rod 12, and the first connecting part 11 is connected to the main reinforcing bar 100 by welding. Welding does not require additional fasteners and provides high connection strength.
[0044] like Figure 1 and Figure 3 As shown, in some embodiments, the concrete limiting block 2 is a cylinder, and the concrete limiting block 2 is coaxially arranged with the bearing rod 12 and rotatably connected to the bearing rod 12. The circumferential surface of the concrete limiting block 2 can roll on the inner circumferential wall of the steel casing.
[0045] With this design, the concrete limiting block 2 can roll along the inner circumferential wall of the steel casing during the lowering of the reinforcing cage, thereby effectively reducing contact friction and facilitating the smooth lowering of the reinforcing cage.
[0046] It is understandable that the diameter of the concrete limiting block 2 can be prefabricated according to the thickness of the protective layer of the reinforcing cage and the radial height of the reinforcing cage 1.
[0047] like Figure 1 and Figure 2 As shown, in some embodiments, there are two first connecting parts 11, which are respectively connected to two adjacent main reinforcing bars 100. One first connecting part 11 is connected between one end of the bearing rod 12 and one main reinforcing bar 100, and the other first connecting part 11 is connected between the other end of the bearing rod 12 and another adjacent main reinforcing bar 100. The concrete limiting block 2 is located between the two first connecting parts 11.
[0048] With this arrangement, the two first connecting parts 11 can be connected to the opposite ends of the bearing rod 12 respectively, which helps to make the steel reinforcement cage 1 form a more balanced and stable support structure.
[0049] like Figure 1 As shown, in some embodiments, each first connection 11 includes a first connection segment 111 and a second connection segment 112, and the first connection segment 111, the second connection segment 112 and the corresponding main reinforcement 100 are arranged to form a triangle. The triangular structure helps to improve the connection stability between the first connection 11 and the corresponding main reinforcement 100 and the deformation resistance of the steel reinforcement cage 1.
[0050] like Figure 1 and Figure 2 As shown, in some embodiments, the reinforcing cage 1 further includes a second connecting portion 13, which is fixedly connected between the bearing rod 12 and the spiral reinforcement 200 of the reinforcing cage. The spiral reinforcement 200 is the stirrup around the main reinforcement 100.
[0051] By adding a second connecting part 13 between the bearing rod 12 and the spiral reinforcement 200, the connection strength between the steel reinforcement skeleton 1 and the steel reinforcement cage is increased, which helps to increase the overall strength and stability of the steel reinforcement cage protective layer thickness control device.
[0052] like Figure 1 and Figure 2 As shown, in some embodiments, the second connecting portion 13 includes a plurality of spaced-apart third connecting segments 131, which are parallel to each other. This arrangement helps to evenly distribute the force and improve the overall stability of the device.
[0053] In this embodiment, the second connecting part 13 includes two third connecting segments 131, but it is not limited to this. In other embodiments, it can also be set to three, four, etc., depending on the actual situation.
[0054] Optionally, the second connecting part 13 is welded to the bearing rod 12, and the second connecting part 13 is welded to the spiral rib 200. Welding eliminates the need for additional fasteners and provides a high connection strength.
[0055] In some embodiments, along the axial direction of the reinforcing cage ( Figure 1 In the X direction of the steel cage, multiple sets of thickness control components are arranged at intervals. Each set of thickness control components includes multiple steel cage protective layer thickness control devices arranged at intervals along the circumference of the steel cage.
[0056] For example, the pile foundation is 132 meters long. Generally, a set of thickness control components is set at 6-meter intervals along the axial direction of the steel cage. Each set of thickness control components includes multiple steel cage protective layer thickness control devices arranged circumferentially.
[0057] By setting multiple sets of thickness control components at intervals along the axial direction of the reinforcing cage, and arranging multiple reinforcing cage protective layer thickness control devices circumferentially in each set, the uniformity of the protective layer thickness of the reinforcing cage throughout the entire axial range can be effectively guaranteed, which helps to reduce local deviations and improve the construction quality and overall stability of the pile foundation.
[0058] In some embodiments, each set of thickness control components includes four rebar cage protective layer thickness control devices, which are evenly distributed. That is, the four rebar cage protective layer thickness control devices are spaced 90° apart circumferentially. This specific angle design not only facilitates positioning but also ensures that the devices form a symmetrical and balanced structure circumferentially. Furthermore, compared to uneven distribution, uniform distribution better balances the stress on the rebar cage, reduces eccentricity, and thus ensures a more uniform protective layer thickness.
[0059] Of course, in other embodiments, the number of steel cage protective layer thickness control devices in each group of thickness control components can also be set to other values, such as five or six evenly spaced, depending on the actual situation.
[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A device for controlling the thickness of the protective layer of a reinforcing cage, characterized in that, The rebar cage protective layer thickness control device is disposed between the radial outer side of the rebar cage and the inner peripheral wall of the steel casing; the rebar cage protective layer thickness control device includes: The steel reinforcement cage (1) includes a first connecting part (11) and a bearing rod (12). The first connecting part (11) is fixedly connected to the main reinforcement (100) of the steel reinforcement cage. The first connecting part (11) protrudes radially outward relative to the main reinforcement (100). The bearing rod (12) is fixedly connected to the end of the first connecting part (11) away from the main reinforcement (100). The projection shape of the first connecting part (11) along the axial direction of the steel reinforcement cage is perpendicular to the projection shape of the bearing rod (12) along the axial direction of the steel reinforcement cage. A concrete limiting block (2) is sleeved and connected to the outer periphery of the bearing rod (12), and the concrete limiting block (2) can abut against the inner peripheral wall of the steel casing.
2. The rebar cage protective layer thickness control device according to claim 1, characterized in that, The concrete limiting block (2) is a cylinder. The concrete limiting block (2) is coaxially arranged with the bearing rod (12) and rotatably connected to the bearing rod (12). The circumferential surface of the concrete limiting block (2) can roll on the inner circumferential wall of the steel casing.
3. The device for controlling the thickness of the protective layer of the reinforcing cage according to claim 2, characterized in that, The first connecting part (11) is configured as two, and the two first connecting parts (11) are respectively connected to the two adjacent main bars (100). One of the first connecting parts (11) is connected between one end of the bearing rod (12) and one of the main bars (100), and the other first connecting part (11) is connected between the other end of the bearing rod (12) and another adjacent main bar (100). The concrete limiting block (2) is located between the two first connecting parts (11).
4. The rebar cage protective layer thickness control device according to claim 3, characterized in that, Each of the first connecting portions (11) includes a first connecting segment (111) and a second connecting segment (112), and the first connecting segment (111), the second connecting segment (112) and the corresponding main reinforcement (100) are arranged to form a triangle.
5. The device for controlling the thickness of the protective layer of the reinforcing cage according to any one of claims 2 to 4, characterized in that, The steel reinforcement cage (1) also includes a second connecting part (13), which is fixedly connected between the bearing rod (12) and the spiral reinforcement (200) of the steel reinforcement cage.
6. The rebar cage protective layer thickness control device according to claim 5, characterized in that, The second connecting part (13) includes a plurality of spaced third connecting segments (131), which are parallel to each other.
7. The device for controlling the thickness of the protective layer of the reinforcing cage according to claim 5, characterized in that, The second connecting part (13) is welded to the bearing rod (12) and to the spiral rib (200).
8. The device for controlling the thickness of the protective layer of the reinforcing cage according to claim 1, characterized in that, The first connecting part (11) and the bearing rod (12) are connected by welding, as are the first connecting part (11) and the main reinforcement (100).
9. The device for controlling the thickness of the protective layer of the reinforcing cage according to claim 1, characterized in that, Along the axial direction of the reinforcing cage, multiple sets of thickness control components are arranged at intervals, and each set of thickness control components includes multiple reinforcing cage protective layer thickness control devices arranged at intervals along the circumference of the reinforcing cage.
10. The device for controlling the thickness of the protective layer of the reinforcing cage according to claim 9, characterized in that, Each set of thickness control components includes four rebar cage protective layer thickness control devices, which are evenly distributed at intervals.