A reinforcing cage anti-floating device

Abstract

The application relates to a reinforcing cage anti-floating device, and belongs to the technical field of pile foundation construction.The reinforcing cage anti-floating device comprises a reinforcing cage arranged at the bottom of a pouring hole of a cast-in-place pile, a casing is arranged at the upper side of the pouring hole, an anti-floating assembly is arranged on the casing, and the anti-floating assembly is used for limiting the upward floating of the reinforcing cage.The application has the effects of limiting the upward floating and left-right deviation of the reinforcing cage and improving the overall stability of the reinforcing cage.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction technology, and in particular to a steel cage anti-buoyancy device. Background Technology

[0002] With the development of construction engineering technology, bored cast-in-place piles have become a common type of pile foundation reinforcement. The quality of the cast-in-place piles is a crucial factor determining the overall quality of the building, and the control of the reinforcing cage is particularly important. Both the hoisting of the reinforcing cage and the pouring of concrete are carried out on the ground. A grouting hole is opened on the ground, and the reinforcing cage is placed inside. After the reinforcing cage is in place, concrete is poured into the grouting hole. As the concrete rises, and due to the small size and light weight of the reinforcing cage, and the rapid pouring speed, the reinforcing cage may float due to the impact or buoyancy of the rising concrete. This can cause the reinforcing cage to exceed its design limits, leading to a series of quality problems. The reinforcing cage is affected by the concrete.

[0003] In existing technologies, measures such as adding bottom supports or increasing the weight of the steel cage, such as adding a hanging plate, are usually taken to prevent the steel cage from floating. However, the steel cage as a whole can still float, shift left and right, or tilt up and down, and its overall stability still needs to be improved. Utility Model Content

[0004] To improve the anti-buoyancy stability of reinforcing cages, this application provides an anti-buoyancy device for reinforcing cages.

[0005] The anti-buoyancy device for reinforcing cages provided in this application adopts the following technical solution: A rebar cage anti-buoyancy device includes a sleeve and an anti-detachment block. The sleeve is connected to the anti-detachment block, and a connecting groove is provided on the sleeve, allowing the sleeve to be fitted onto the rebar cage through the connecting groove. The anti-buoyancy device also includes an mounting block, a first limiting block, a first fixing block, and a fixing screw. A through hole is provided on the side wall of the sleeve for the mounting block to pass through. An mounting groove is provided on the mounting block for the first limiting block to pass through. The first limiting block is used to limit the positional relationship between the mounting block and the sleeve. The first fixing block is connected to the mounting block, and the fixing screw is threadedly connected to the first fixing block. A positioning nut is provided on the fixing screw, and the positioning nut is threadedly connected to the fixing screw.

[0006] By adopting the above technical solution, when the steel cage floats, the sleeve synchronously drives the anti-detachment block to float. The positioning nut can limit the vertical displacement of the anti-detachment block, and simultaneously, the fixing screw can limit the horizontal displacement of the anti-detachment block. That is, the anti-buoyancy device can limit the floating and left-right displacement of the steel cage to a certain extent, thereby improving the overall stability of the steel cage.

[0007] Preferably, the anti-detachment block is provided with a support block, the support block is provided with a lifting block, the lifting block is frustum-shaped, the second limiting block is provided with a limiting groove, a spring is fixed on the side wall of the limiting groove, a second fixing block is provided on the spring, a push rod is fixed on the second fixing block, and the end of the push rod away from the second fixing block extends to the outside of the limiting groove.

[0008] By adopting the above technical solution, when the steel cage floats, the sleeve drives the lifting block to move upward. When the lifting block slides into the limiting groove, the lifting block pushes the second fixing block to slide towards the inner wall of the limiting groove. The lifting block continues to slide until the support block is completely located in the limiting groove. At this time, the spring pushes the second fixing block to slide towards the support block until the second fixing block completely abuts against the side wall of the support block. The lifting block and the second fixing block cooperate to limit the displacement between the limiting block and the anti-detachment block. That is, the anti-buoyancy device can limit the floating and lateral displacement of the steel cage to a certain extent, and improve the overall stability of the steel cage.

[0009] Preferably, the anti-detachment block is provided with a guide slope.

[0010] By adopting the above technical solution, the guide ramp can, to a certain extent, help the limiting block to better combine with the lifting block.

[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. Anti-buoyancy devices can limit the upward floating and lateral displacement of the steel cage to a certain extent, thereby improving the overall stability of the steel cage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the anti-buoyancy device in Example 1 of the application.

[0013] Figure 2 This is a top view of the steel cage and casing in Example 1 of the application.

[0014] Figure 3 This is a schematic diagram of the sleeve in Embodiment 1 and Embodiment 2.

[0015] Figure 4 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0016] Figure 5 This is a schematic diagram of the overall structure of the anti-buoyancy device in Embodiment 2 of the application.

[0017] Figure 6 This is a schematic diagram of the overall structure of the anti-buoyancy device in Embodiment 2 of the application.

[0018] Figure 7 This is a schematic diagram of the separation stage of the limiting block and the anti-detachment block in Embodiment 2 of the application.

[0019] Figure 8 This is a schematic diagram of the structure of the stage where the limiting block and the anti-detachment block are combined in the second embodiment of the application.

[0020] Explanation of reference numerals in the attached drawings: 1. Casing; 2. Reinforcing cage; 3. Mounting block; 4. First limiting block; 5. First fixing block; 6. Fixing screw; 7. Positioning nut; 8. Sleeve; 81. Connecting groove; 82. Baffle; 9. Anti-detachment block; 10. First handle; 11. First bevel gear; 12. Second bevel gear; 13. Limiting screw; 14. Limiting cylinder; 15. Connecting block; 16. Second limiting block; 161. Limiting groove; 17. Push rod; 18. Lifting block; 19. Support block; 20. Second fixing block; 21. Second handle; 22. Guide slope; 101. Injection hole; 102. Through hole. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0022] Example 1: This application discloses a rebar cage anti-buoyancy device for limiting the upward movement of the rebar cage 2 located at the bottom of the grouting hole 101 of a cast-in-place pile. (Refer to...) Figure 1 and Figure 2 It includes a casing 1, a reinforcing cage 2, and an anti-buoyancy component, which are installed on the upper side of the grouting hole 101 of the cast-in-place pile. The reinforcing cage 2 is inserted into the grouting hole 101 in a vertical direction. The reinforcing cage 2 is coaxial with the grouting hole 101. One end of the reinforcing cage 2 away from the bottom of the grouting hole 101 extends into the inside of the casing 1. The casing 1 is annular and is coaxial with the reinforcing cage 2. The anti-buoyancy component is used to limit the upward movement of the reinforcing cage 2.

[0023] Reference Figure 3 The anti-buoyancy component includes a sleeve 8, on which an anti-detachment block 9 is welded and fixed. The anti-detachment block 9 is vertically arranged on the sleeve. A connecting groove 81 for the steel bars of the steel cage 2 to pass through is provided on the sleeve 8. The sleeve 8 is fitted onto the main reinforcement of the steel cage 2 through the connecting groove 81. A baffle 82 is hinged to the sleeve 8. The part of the baffle 82 away from the hinge end is fixed to the sleeve 8 with screws.

[0024] Reference Figure 1 and Figure 4 The casing 1 is provided with an installation block. A through hole 102 is provided in the side wall of the casing along the horizontal direction for the installation block to pass through. The casing 1 is also provided with a first limiting block 4 in an L-shape. The first limiting block 4 is used to limit the positional relationship between the installation block 3 and the casing 1.

[0025] Reference Figure 4A second fixing block 5 is welded and fixed on the mounting block 3. A vertically arranged fixing screw 6 is provided on the second fixing block 5. A fixing through hole for the fixing screw 6 to pass through is provided on the second fixing block 5. An anti-detachment groove for the fixing screw 6 to pass through is provided on the anti-detachment block 9. A positioning nut 7 is threadedly connected to the fixing screw 6. The positioning nut 7 is located between the second fixing block 5 and the anti-detachment block 9, and the end face of the positioning nut 7 facing away from the second fixing block 5 is in contact with the anti-detachment block 9. A first handle 10 is welded to the end of the fixing screw 6 away from the bottom of the injection hole 101.

[0026] The implementation principle of the anti-buoyancy device for a steel cage provided in this application embodiment is as follows: During installation, the baffle 82 is first opened, and then the main reinforcement bars on the steel cage 2 are passed through the connecting groove 81 until the inner wall of the sleeve 8 is in contact with the main reinforcement bars. Then, the baffle 82 and the sleeve 8 are fixed with screws, thus connecting the sleeve 8 to the steel cage 2. Subsequently, the mounting block 3 is passed through the through hole 102, and the mounting block 3 drives the second fixing block 5 to slide until the mounting groove is not completely blocked by the protective sleeve 1. Then, the first limiting block 4 is inserted into the mounting groove. At this time, the mounting block 3 no longer moves. The operator can rotate the first handle 10, which drives the fixing screw 6 to rotate until the fixing screw 6 passes through the anti-detachment groove and the positioning nut 7 on the fixing screw 6 abuts against the anti-detachment block 9, thus completing the installation of the anti-buoyancy component.

[0027] When the steel cage 2 floats up, the sleeve synchronously drives the anti-detachment block 9 to float up. The positioning nut 7 can limit the vertical displacement of the anti-detachment block 9. Simultaneously, the fixing screw 6 can limit the horizontal displacement of the anti-detachment block 9. That is, the anti-buoyancy device can limit the floating and left and right displacement of the steel cage 2 to a certain extent, thereby improving the overall stability of the steel cage 2.

[0028] Example 2 differs from Example 1 in that, referring to... Figure 5 and Figure 6 A limiting cylinder 14 is welded and fixed on the mounting block. A connecting block 15 is slidably connected inside the limiting cylinder 14. A connecting groove for the connecting block 15 to slide through the limiting cylinder 14 is provided. A limiting screw 13 is threadedly connected to the connecting block 15. When the limiting screw 13 rotates, the connecting block 15 can slide along the connecting groove under the action of thread transmission. A second limiting block 16 is fixedly provided at one end of the connecting block 15 near the anti-detachment block 9.

[0029] Reference Figure 5 and Figure 6 A second bevel gear 12 is coaxially fixed on one end of the limiting screw 13 away from the bottom of the injection hole 101. A first bevel gear 11 is provided on the protective sleeve 1. The first bevel gear 11 and the second bevel gear 12 mesh with each other. A second handle 21 is fixedly provided on one end of the first bevel gear 11 away from the steel cage 2.

[0030] Reference Figure 6 and Figure 7 A support block 19 is integrally formed on the anti-detachment block 9, and a lifting block 18 is integrally formed on the end of the support block 19 away from the anti-detachment block 9. The lifting block 18 is in the shape of a frustum.

[0031] Reference Figure 6 and Figure 7 A limiting groove 161 is formed on the second limiting block 16. A spring is fixed on the side wall of the limiting groove 161. A second fixing block 20 is fixed to the end of the spring away from the inner wall of the limiting groove 161. A push rod 17 is welded to the second fixing block 20. The push rod 17 is arranged in a vertical direction, and the end of the push rod 17 away from the second fixing block 20 extends to the top of the protective cylinder 1. In this embodiment, there are two second fixing blocks 20, and the two second fixing blocks 20 are symmetrically arranged about the central axis in the vertical direction of the limiting cylinder 14.

[0032] Reference Figure 7 and Figure 8 The anti-detachment block 9 is provided with a guide slope 22.

[0033] During installation, first, open the baffle 82, then pass the main reinforcement bar through the connecting groove 81 until the inner wall of the sleeve 8 is in contact with the main reinforcement bar. Then, fix the baffle 82 and the sleeve 8 with screws to connect the sleeve 8 to the reinforcing cage 2. Next, install the first bevel gear 11, then pass the mounting block 3 through the through hole 102. The mounting block 3 drives the limiting cylinder 14 to slide until the mounting groove is no longer obstructed by the protective sleeve 1. Then, insert the first limiting block 4 into the mounting groove. At this point, the mounting block 3 no longer shifts, and simultaneously, the second bevel gear 12 fully meshes with the first bevel gear 11. The operator turns the second handle 21, which drives the first bevel gear 11 to rotate. Simultaneously, the second bevel gear 12, which meshes with the first bevel gear 11, rotates, the limiting screw 13 rotates, and the connecting block 15 slides up and down along the connecting groove, simultaneously driving the second limiting block 16 to slide.

[0034] Reference Figure 7 and Figure 8When the rebar cage 2 floats, the sleeve synchronously drives the anti-detachment block 9 to float, and the support block 19 drives the lifting block 18 to move upward. At this time, the guide slope 22 can, to a certain extent, assist the second limiting block 16 in better engaging with the lifting block 18. When the lifting block 18 slides into the limiting groove 161, the lifting block 18 pushes the second fixing block 20 to slide horizontally towards the inner wall of the limiting groove 161. At this time, the spring is in a compressed state. The lifting block 18 continues to slide until the support block 19 is completely located in the limiting groove 161. At this time, the spring pushes the second fixing block 20 to slide towards the support block 19 until the second fixing block 20 is completely abutting against the side wall of the support block 19. At this time, the bottom surface of the second limiting block 16 abuts against the top surface of the anti-detachment block 9. The lifting block 18 and the second fixing block 20 cooperate to limit the vertical and horizontal displacement of the second limiting block 16 and the anti-detachment block 9. That is, the anti-buoyancy device can, to a certain extent, limit the floating and lateral displacement of the rebar cage 2, and improve the overall stability of the rebar cage 2.

[0035] If dismantling is required, the operator pushes the push rod 17 away from the limiting cylinder 14 until the top surface of the second fixing block 20 is completely separated from the ground of the lifting block 18. The steel cage 2 can rely on its own weight to drive the sleeve to drive the anti-detachment block 9 to sink. If the steel cage 2 has reached the ideal state, the second handle 21 can be rotated in the opposite direction to make the connecting block 15 drive the second limiting block 16 to move upward. Similarly, the second limiting block 16 can be separated from the anti-detachment block 9.

[0036] Finally, the operator turns the screw to separate the baffle 82 from the sleeve 8, thereby separating the sleeve 8 from the reinforcing cage 2.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel cage anti-buoyancy device for limiting the upward floating of a steel cage (2) installed at the bottom of a grouting hole (101) in a cast-in-place pile, characterized in that: A protective sleeve (1) is provided on the upper side of the injection hole (101). An anti-buoyancy component for limiting the floating of the steel cage (2) is provided on the protective sleeve (1). The anti-buoyancy component includes a sleeve (8) and an anti-detachment block (9) provided on the sleeve (8). A connecting groove (81) for the steel bars of the steel cage (2) to pass through is provided on the sleeve (8). The sleeve (8) is provided on the steel cage (2) through the connecting groove (81).

2. The anti-buoyancy device for reinforcing cages according to claim 1, characterized in that: The protective sleeve (1) is provided with an installation block (3), and the protective sleeve (1) is also provided with a first limiting block (4) for the installation block (3) to be installed.

3. The anti-buoyancy device for reinforcing cages according to claim 2, characterized in that: The mounting block (3) is provided with a first fixing block (5), and the first fixing block (5) is provided with a fixing screw (6). The first fixing block (5) is provided with a fixing through hole for the fixing screw (6) to pass through. The fixing screw (6) is threaded with a positioning nut (7). The positioning nut (7) is located between the first fixing block (5) and the anti-detachment block (9), and the end face of the positioning nut (7) facing away from the first fixing block (5) is in contact with the anti-detachment block (9).

4. The anti-buoyancy device for reinforcing cages according to claim 2, characterized in that: The mounting block is provided with a limiting cylinder (14), and a connecting block (15) is slidably connected inside the limiting cylinder (14). A connecting groove for the connecting block (15) to slide through the limiting cylinder (14) is provided. A limiting screw (13) is threadedly connected to the connecting block (15). When the limiting screw (13) rotates, the connecting block (15) can slide along the connecting groove under the action of the threaded transmission. A second limiting block (16) is provided at one end of the connecting block (15) near the anti-detachment block (9).

5. The anti-buoyancy device for reinforcing cages according to claim 4, characterized in that: The sleeve (1) is provided with a first bevel gear (11), and the limiting screw (13) is coaxially provided with a second bevel gear (12), and the first bevel gear (11) and the second bevel gear (12) mesh.

6. The anti-buoyancy device for reinforcing cages according to claim 5, characterized in that: The anti-detachment block (9) is provided with a support block (19), and the support block (19) is provided with a lifting block (18) in the shape of a frustum. The second limiting block (16) is provided with a limiting groove (161). A spring is fixed on the side wall of the limiting groove (161). A second fixing block (20) is provided on the spring. A push rod (17) is fixed on the second fixing block (20). The end of the push rod (17) away from the second fixing block (20) passes through the second limiting block (16).

7. The anti-buoyancy device for reinforcing cages according to claim 6, characterized in that: The anti-detachment block (9) is provided with a guide slope (22).

Images