Anti-floating device for bored pile reinforcement cage

Abstract

The application discloses a cast-in-place pile steel reinforcement cage anti-floating device, which comprises a device main body, clamping pieces and telescopic pieces are arranged on the device main body, the device main body is symmetrically arranged on two sides of the steel reinforcement cage through the clamping pieces, the device main body is connected with the inner wall of a pile hole through the telescopic pieces, the device main body is connected with a controller through a connecting line, and the controller is connected with and controls the clamping pieces. In the application, a controllable telescopic anti-floating device is adopted, the device is fixed in the steel reinforcement cage, pressure is symmetrically applied to the inner wall of the pile hole, the friction force between the inner wall of the pile hole and the anti-floating device is utilized, the buoyancy that the steel reinforcement cage is subjected to is resisted, the accident that the steel reinforcement cage floats up is avoided, and the pile quality and the pile body strength are ensured.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and more specifically, to an anti-buoyancy device for the reinforcing cage of a bored pile. Background Technology

[0002] Drilled cast-in-place piles are piles constructed by mechanically drilling holes in the foundation soil on-site, placing a reinforcing cage inside, and then pouring concrete. Based on the pile-forming process, they are classified into dry-method drilled cast-in-place piles, mud-wall method drilled cast-in-place piles, and full-casing drilled cast-in-place piles. Among these, mud-wall method drilled cast-in-place piles are prone to "cage floating" accidents during concrete pouring, as the concrete exerts a buoyancy force on the reinforcing cage. This can negatively impact pile quality and strength, or even result in unusable piles. Current technologies for preventing reinforcing cage buoyancy have drawbacks such as high cost, impact on project quality, and high skill requirements for engineers. Therefore, new measures are needed to prevent reinforcing cage floating. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides an anti-buoyancy device for the reinforcing cage of bored cast-in-place piles.

[0004] The technical solution of this invention is as follows:

[0005] A device for preventing buoyancy of a bored pile reinforcement cage includes a main body, which is provided with clamping components and telescopic components. The main body is symmetrically arranged on both sides of the reinforcement cage through the clamping components. The main body is connected to the inner wall of the pile hole through the telescopic components. The main body is connected to a controller through a connecting line. The controller is connected to and controls the clamping components.

[0006] The above-mentioned anti-buoyancy device for reinforced cages of bored piles includes a telescopic component comprising a telescopic screw and a telescopic disc. The telescopic disc is provided at the end of the telescopic screw. The controller is connected to and controls the length of the telescopic screw extending out of the main body of the device, so that the telescopic disc is connected to or away from the inner wall of the pile hole.

[0007] Furthermore, the telescopic disc has a flat-topped conical disc structure, and a rubber pad is provided at the end of the telescopic disc.

[0008] The above-mentioned anti-buoyancy device for a bored pile reinforcement cage includes a clamping member comprising a flat clamping plate and an arc-shaped clamping plate. The flat clamping plate and the arc-shaped clamping plate clamp the main reinforcement bars of the reinforcement cage from both ends, thereby fixing the main body of the device onto the reinforcement cage.

[0009] Furthermore, the main body of the device is provided with a clamping plate groove, one end of the flat clamping plate and one end of the arc-shaped clamping plate are slidably connected to the clamping plate groove, and the flat clamping plate and the arc-shaped clamping plate slide in the clamping plate groove respectively under the control of the controller or manual knob, thereby changing the distance between the arc-shaped clamping plate and the flat clamping plate.

[0010] Furthermore, both the interior of the flat clamping plate and the interior of the curved clamping plate are provided with reinforcing mesh patterns.

[0011] In the aforementioned anti-buoyancy device for a bored pile reinforcing cage, the clamping member is fixed 5-10 cm above the stiffening hoop of the reinforcing cage.

[0012] In the aforementioned anti-buoyancy device for reinforced cages of bored piles, one end of the connecting line extends from the main body of the device, and the other end of the connecting line is provided with a plug. The controller is provided with a connection socket, and the plug is inserted into the socket, so that the main body of the device is connected to the controller through the connecting line.

[0013] The aforementioned anti-buoyancy device for reinforced steel cages in bored piles includes a controller equipped with a three-color sensor light.

[0014] In the aforementioned anti-buoyancy device for reinforced cages of bored piles, a pressure sensor is provided at the end of the telescopic member, and the pressure sensor is connected to and sends a pressure signal to the controller via the connecting line.

[0015] The aforementioned anti-buoyancy device for reinforced cages of bored piles includes a displacement sensor installed inside the main body of the device, which is connected to the telescopic component and the controller.

[0016] The above-mentioned anti-buoyancy device for reinforced cages of bored piles is used as follows:

[0017] Step S1. Fix the main body of the device to the steel cage and install the controller on the ground;

[0018] Step S2. Lower the steel cage into the pile hole until the main body of the device is positioned at the calculated elevation.

[0019] Step S3. The controller controls the extension of the telescopic component so that the pressure of the telescopic component pressing against the inner wall of the pile hole reaches the design pressure value, or so that the extension length of the telescopic component reaches the design length value.

[0020] Step S4. Pour concrete into the pile hole;

[0021] Step S5. The controller controls the telescopic component to return to its original position and the clamping component to release. Ground personnel then pull the main body of the device out of the pile hole via the connecting line.

[0022] Furthermore, in step S1, the main body of the device is used in pairs, symmetrically positioned with respect to the reinforcing cage and at the same height of the reinforcing cage.

[0023] Furthermore, in step S1, the main body of the device clamps the main reinforcement bars of the steel cage using the clamping member.

[0024] Furthermore, in step S2, the main body of the device is at an elevation corresponding to hard clay or rock strata.

[0025] Furthermore, in step S2, the end-bearing piles of the bored cast-in-place piles formed by the steel cage and concrete are located in the lower hard rock layer, while the friction piles extend beyond the soft strata in the formation.

[0026] Furthermore, the controller is preset with three pressure segments. In step S3, the pressure sensor located at the end of the telescopic component sends a pressure signal to the controller. The controller calculates the pressure signal and determines the pressure segment in which the telescopic component is subjected to pressure, and feeds back to the operator through a three-color sensor light.

[0027] Furthermore, in step S5, the controller controls the length of the telescopic component to return to less than 10 millimeters.

[0028] According to the above-described scheme, the beneficial effect of this invention is that it employs a controllable telescopic anti-buoyancy device, which is fixed in the reinforcing cage and applies pressure symmetrically to the inner wall of the pile hole. The friction between the inner wall of the pile hole and the anti-buoyancy device is used to resist the buoyancy force on the reinforcing cage, thereby preventing the reinforcing cage from floating and ensuring the quality of the pile and the strength of the pile body.

[0029] 1. Compared with existing technologies for controlling concrete quality and pouring speed, this invention uses objective data for control, utilizing visualized pressure values ​​and pre-designed calculated elevations to reduce the experience and skill requirements of construction personnel. In actual construction, there is no need to consider too many external factors, and even intelligent equipment can be used for management to improve the intelligence and modernization of the construction site.

[0030] 2. Compared to existing technologies that use a downward-pressing device to apply a downward force to the top of the reinforcing cage to resist buoyancy, this invention provides more uniform force distribution and better ensures pile quality. Existing downward-pressing devices are often located at the pile borehole opening, using long rods or lifting bars to transfer the pressure of the counterweight to the reinforcing cage. In this case, the installation time is long, and when the pile hole and reinforcing cage are short, excessively long lifting bars or rods can lead to uneven stress on the reinforcing cage, potentially causing the upper end of the cage to be restricted and the lower end to tilt. In contrast, this invention features a symmetrically designed fastening device with synchronously extending and symmetrically contracting telescopic components at both ends. This can correct the tilt of the reinforcing cage to a certain extent, ensuring that the reinforcing cage remains centered in the pile hole during concrete pouring, further improving the pile quality of bored cast-in-place piles.

[0031] 3. This device is simple to operate and easy to install. The fastening effect can be achieved through a visual display screen and sensor-activated control buttons. Its small overall size facilitates storage and transportation. Furthermore, compared to existing technologies that use extended reinforcing bars, welded angle steel, or steel plates at the bottom of the reinforcing cage to increase the pressure exerted by the concrete on the lower part, thus achieving anti-buoyancy, this device can be repeatedly recycled after a one-time investment, requiring no additional consumable materials. Its overall cost is low, making it particularly economical for projects with a large number of piles.

[0032] 4. This device, through the adjustment of the clamping plate and sliding groove, can be applied to steel cages of different diameters and main reinforcement types. In terms of application, it is suitable for all strata except for soft strata such as silt, silty soil, gravel, or medium-coarse sand, which cannot withstand the horizontal pressure of this device. For general bored piles, end-bearing piles will penetrate into the underlying hard rock, and friction piles will also exceed the soft strata in the formation. Therefore, this device can play a role in fastening and anti-buoyancy for bored piles under most construction conditions, and its overall applicability is strong. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the elevation structure of the present invention.

[0035] Figure 2 This is a schematic diagram of the top structure of the main body of the device.

[0036] Figure 3This is a schematic diagram of the structure of this device applied to a steel cage.

[0037] Figure 4 for Figure 3 Cross-sectional view of AA.

[0038] The following are the labeling elements in the figure:

[0039] 1. Main body of the device; 2. Clamping components; 21. Flat clamping plate; 22. Curved clamping plate; 3. Clamping plate groove; 4. Manual knob; 5. Telescopic screw; 6. Telescopic disc; 7. Rubber pad; 8. Connecting wire; 9. Plug; 10. Connecting socket; 11. Display screen; 12. Three-color sensor light; 13. Clamping component control button; 14. Telescopic component control button; 15. Controller; 16. Reinforcing cage; 161. Main reinforcement; 162. Stiffening hoop. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] It should be noted that when a component is referred to as "fixed," "set," or "connected" to another component, it may be located directly or indirectly on that other component. The terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or position shown in the accompanying drawings, and are only for ease of description and should not be construed as limiting the present technical solution.

[0042] A type of anti-buoyancy device for reinforced cages of bored piles, such as Figure 1 , Figure 2 As shown, the device includes a main body 1, which is equipped with a clamping member 2 and a telescopic member. The main body 1 is symmetrically arranged on both sides of the reinforcing cage 16 through the clamping member 2. The main body 1 is connected to the inner wall of the pile hole through the telescopic member. The main body 1 is connected to the controller 15 through the connecting line 8. The controller 15 is connected to and controls the clamping member 2.

[0043] The device is installed on the reinforcing cage 16. The main body 1 of the device is fixed to the reinforcing cage 16 by the clamping member 2. When the reinforcing cage 16 is lowered into the pile hole, the telescopic member is extended by the controller 15 to abut against the inner wall of the pile hole and apply a certain pressure. This effectively avoids the floating accident of the reinforcing cage 16 caused by factors such as the jacking force of concrete, the specific gravity of mud, and the concrete pouring speed during the concrete pouring process of the drilled cast-in-place pile using the mud wall protection method, thereby improving the pile formation quality of the drilled cast-in-place pile.

[0044] In this embodiment, the main body 1 of the device is a rectangular box-shaped structure with a telescopic component at one end and a connecting line 8 at the other end. A clamping component 2 is provided on one side, and the clamping surface is set at a right angle to the plane where the telescopic component is located, thereby reducing the correlation between the clamping state of the main body 1 and the top-adhesion state of the telescopic component.

[0045] On the other hand, the design of the position of the connecting line 8 takes into account that the final device body 1 needs to be moved out of the pile hole from the concrete under the pull of the connecting line 8. It is necessary to reduce the resistance of the concrete during the pulling. On the one hand, this can reduce the resistance area in the direction of movement. On the other hand, it can also reduce the adhesion surface or adhesive force between the exposed part of the device body 1 and the concrete during the upward movement. Therefore, the connecting line 8 is set in a position opposite to the expansion joint. The expansion joint is the main component that provides anti-buoyancy force for the reinforcing cage 16 during the concrete pouring process. Therefore, if it is on the side that does not reduce resistance during the upward movement, the resistance it brings will be greater than that of other exposed parts, which is not conducive to the upward movement of the device body 1. Therefore, when the connecting line 8 pulls the device body 1 upward, the expansion joint is placed on the side that reduces resistance.

[0046] A pressure sensor is provided at the end of the telescopic component. The pressure sensor is connected to the controller 15 via the connecting line 8 and sends a pressure signal to the controller 15, so that the controller 15 can determine the control based on the extrusion pressure of the telescopic component.

[0047] In one embodiment, the telescopic component includes a telescopic screw 5 and a telescopic disc 6. The telescopic disc 6 is provided at the end of the telescopic screw 5. The telescopic disc 6 has a flat-topped conical disc structure, and a rubber pad 7 is provided at the end of the telescopic disc 6. The controller 15 is connected to the telescopic rod through a power mechanism inside the device body 1, and controls the length of the telescopic screw 5 extending out of the device body 1, so that the telescopic disc 6 is connected to or away from the inner wall of the pile hole.

[0048] Preferably, during the expansion and contraction process, the telescopic screw 5 of the telescopic component may be inside the concrete. To prevent excessive adhesion of concrete during this process and reduce contamination of the device body 1, a screw scraper is installed at the end where the telescopic screw 5 connects to the device body 1. The screw scraper can be configured as an elastic structure, with its scraper blades abutting against the threads of the telescopic screw 5. When the telescopic screw 5 rotates, the scraper blades move relative to the threads of the telescopic screw 5, continuously extending and retracting, thus blocking the concrete adhering to the telescopic screw 5 from outside the device body 1. Simultaneously, the surface of the telescopic screw 5 can be coated with grease such as diesel fuel or waste engine oil to reduce adhesion.

[0049] In another embodiment, the telescopic member is a perforated telescopic plate. The telescopic plate extends out of the device body 1 through the telescopic structure provided on the device body 1, thereby forming a plate-like structure on the outside of the device body 1, which squeezes the inner wall of the pile hole. Its end is also provided with a pressure sensor and a rubber pad 7.

[0050] The clamping component 2 includes a flat clamping plate 21 and an arc-shaped clamping plate 22. The flat clamping plate and the arc-shaped clamping plate clamp the main reinforcement bars 161 of the reinforcing cage 16 from both ends, thereby fixing the main body 1 of the device onto the reinforcing cage 16. The main body 1 is provided with a clamping plate groove 3. One end of the flat clamping plate 21 and one end of the arc-shaped clamping plate 22 are slidably connected to the clamping plate groove 3. Under the control of the controller 15 or the manual knob 4, the flat clamping plate 21 and the arc-shaped clamping plate 22 slide in the clamping plate groove 3 respectively, changing the distance between the arc-shaped clamping plate 22 and the flat clamping plate 21. Preferably, the interior of the flat clamping plate 21 and the interior of the arc-shaped clamping plate 22 are provided with a reinforcing mesh pattern. The mesh pattern is a diamond structure to increase the friction between the arc-shaped clamping plate 22, the flat clamping plate 21 and the reinforcing bars, and to prevent the main body 1 of the device from falling off the reinforcing cage 16 during construction.

[0051] Preferably, the clamping member 2 is fixed 5-10 cm above the stiffening hoop 162 of the reinforcing cage 16.

[0052] Preferably, the main body 1 of the device is arranged symmetrically in pairs and staggered vertically.

[0053] One end of the connecting wire 8 extends from the main body 1 of the device. A soft rubber structure is provided at the connection point between the connecting wire 8 and the main body 1 to reinforce the connection structure between the connecting wire 8 and the main body 1, and to prevent the connecting wire 8 from breaking during pulling. The other end of the connecting wire 8 is provided with a plug 9, and the controller 15 is provided with a connection socket 10. The plug 9 is inserted into the socket, so that the main body 1 is connected to the controller 15 through the connecting wire 8.

[0054] The controller 15 is equipped with a clamping component control button 13, a telescopic component control button 14, a three-color sensor light 12, and a display screen 11. The display screen 11 shows the length of the telescopic component extending from the main body 1 of the device, the setting status of the clamping components 2, the distance between the clamping components 2, and the pressure value at the end of the telescopic component. This information is obtained through calculations by the control chip using sensors located at various points on the main body 1 and the telescopic components, and then displayed on the display screen 11. The clamping component control button 13 includes "on" and "off" buttons. Based on the pressure signal fed back by the pressure sensor on the clamping component 2, or a pre-set limit dimension, it senses the distance between the flat clamping plate 21 and the curved clamping plate 22, and sends a corresponding signal back to the controller 15. This allows the controller 15 to determine the state of the clamping component 2 and control its state via the clamping component control button 13. The telescopic component control button 14 includes "extend" and "retract" buttons, allowing the operator to control the extension and retraction length of the telescopic component. Based on the signals sent by the pressure sensor installed at the end of the telescopic component and the sensor installed inside the main body 1 that senses the telescopic component's extension length, the controller 15 determines the location of the telescopic component, and its extension length is fed back to the operator through the three-color sensor light 12 to achieve visual control.

[0055] A type of anti-buoyancy device for a bored pile reinforcement cage 16, the method of use of which is as follows:

[0056] Step S1. Fix the main body 1 of the device to the steel cage 16 and install the controller 15 on the ground.

[0057] Step S2. Lower the steel cage 16 into the pile hole until the main body of the device 1 is placed at the calculated elevation.

[0058] Step S3. Controller 15 controls the extension of the telescopic component so that the pressure of the telescopic component pressing against the inner wall of the pile hole reaches the design pressure value, or so that the extension length of the telescopic component reaches the design length value.

[0059] Step S4. Pour concrete into the pile hole.

[0060] Step S5. Controller 15 controls the telescopic component to return to its original position and the clamping component 2 to release. Ground personnel then pull the main body 1 of the device out of the pile hole via the connecting line 8.

[0061] 16. The end-bearing piles of the drilled empty cast-in-place piles formed by the reinforcing cage and concrete are located in the lower hard rock layer, while the friction piles exceed the soft strata in the formation.

[0062] During construction, drilling of pile holes, fabrication of the reinforcing cage 16, and installation of the controller 15 can be carried out simultaneously. After the fabrication of the reinforcing cage 16 is completed, as follows: Figure 3 , Figure 4 As shown, the main body 1 of the device is used in pairs, symmetrically positioned at the same height as the reinforcing cage 16, with the two main bodies 161 clamped by the clamping members 2. The device body 1 is positioned such that when the reinforcing cage 16 is in its designed position, it is at an elevation that provides compressive force. Utilizing the friction between the expansion joint and the inner wall of the pile hole, the device body 1 applies force to the reinforcing cage 16, counteracting the buoyancy force and preventing the reinforcing cage 16 from floating. Based on the lowering height of the reinforcing cage 16 into the pile hole and the surrounding geological strata, the device body 1 is positioned to avoid being located in soft strata such as silt, silty soil, gravel, or medium-coarse sand, and is instead fixed at an elevation corresponding to hard clay or rock strata.

[0063] The controller 15 has three preset pressure ranges. Pressure sensors located at the ends of the telescopic components send pressure signals to the controller 15. The controller 15 calculates the pressure signals and determines the pressure range of the telescopic component, feeding back the information to the operator via the three-color sensor lights 12. After the steel cage 16 is hoisted into place, the operator controls the length of the telescopic component using the telescopic component control button 14 on the controller 15. A long press of the "Extend" button extends the component, and a long press of the "Retract" button shortens it. The operator can select the telescopic component control button 14 and the pressing duration using the status of the three-color sensor lights 12 to achieve the appropriate length for the telescopic component. The sensor lights are red, yellow, and green.

[0064] In one embodiment, the main bodies 1 of the device at the same height and in a symmetrical state form a group, and the telescopic components of each group of main bodies 1 extend synchronously and symmetrically. When the telescopic component touches the inner wall of the pile hole, the green light in the three-color sensor light 12 illuminates. When the extension of the telescopic component reaches the predetermined length or contacts the inner wall of the pile hole, it should continue to extend and pressurize until the telescopic component is firmly fixed to the inner wall of the pile hole or the pressure value fed back by its pressure sensor reaches the design pressure. At this time, the green light in the three-color sensor light 12 goes out and the yellow light illuminates, and pressing the telescopic component control button 14 should be stopped. When the three-color sensor light 12 turns red, it indicates that the pressure at the end of the telescopic component is too high, and it is necessary to appropriately retract part of the length so that the three-color sensor light 12 returns to the yellow state. At this time, the main body 1 of the device completes the fixing work of the reinforcing cage 16.

[0065] After the main body of the device 1 is installed, the guide pipe is lowered, the hole is cleaned a second time, and concrete is poured according to the normal construction process for cast-in-place piles. During the initial pouring, the bottom of the guide pipe is 300-500 mm away from the bottom of the hole. At the beginning of the pouring, ensure that the guide pipe is buried below the concrete pouring surface in one go, and at least equal to or lower than 0.8 meters below the pouring surface. In the early stage of concrete pouring, the pouring speed should be slowed down as much as possible. During concrete pouring, ensure that the depth of the guide pipe buried in the concrete is controlled within 2-3 meters. At the same time, strengthen on-site scheduling to ensure timely supply of concrete.

[0066] Under normal circumstances, the reinforcing cage 16 is embedded about 5 meters into the concrete. The friction between the reinforcing cage 16 and the concrete is sufficient to resist the buoyancy force on the reinforcing cage 16, and at this point, the reinforcing cage 16 is unlikely to float. Therefore, for cast-in-place piles with a relatively long solid pile body, the main body 1 of the device can be retrieved when the surface of the poured concrete exceeds 5 meters above the bottom of the reinforcing cage 16. For cast-in-place piles with a relatively short solid pile body, the retrieval of the main body 1 can begin after the pouring is completed and the guide pipe is pulled out.

[0067] In this embodiment, in order to reduce the resistance caused by the telescopic component during the upward movement of the main body 1, the controller 15 controls the length of the telescopic component to be restored to less than 10 mm before releasing the clamping component 2 to retrieve the main body 1.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for preventing buoyancy of a reinforcing cage in a bored pile, characterized in that, The device includes a main body, which is equipped with clamping components and telescopic components. The main body is symmetrically arranged on both sides of the reinforcing cage through the clamping components. The main body is connected to the inner wall of the pile hole through the telescopic components. The main body is connected to a controller through a connecting line. The controller is connected to and controls the clamping components. When the steel cage is lowered into the pile hole, the telescopic component is extended by the controller to press against the inner wall of the pile hole and apply pressure. The friction between the inner wall of the pile hole and the anti-buoyancy device is used to resist the buoyancy of the steel cage. The telescopic component includes a telescopic screw and a telescopic disc. The telescopic disc is provided at the end of the telescopic screw. The controller is connected to and controls the length of the telescopic screw extending out of the main body of the device, so that the telescopic disc is connected to or away from the inner wall of the pile hole. The clamping member includes a flat clamping plate and an arc-shaped clamping plate. The flat clamping plate and the arc-shaped clamping plate clamp the main reinforcement bars of the steel cage from both ends, so that the main body of the device is fixed on the steel cage. The main body of the device is provided with a clamping plate slide groove. One end of the flat clamping plate and one end of the arc clamping plate are slidably connected to the clamping plate slide groove. Under the control of the controller or manual knob, the flat clamping plate and the arc clamping plate slide in the clamping plate slide groove respectively, changing the distance between the arc clamping plate and the flat clamping plate. One end of the connecting line extends from the main body of the device, and the other end of the connecting line is provided with a plug. The controller is provided with a connection socket, and the plug is inserted into the socket, so that the main body of the device is connected to the controller through the connecting line.

2. The anti-buoyancy device for the reinforcing cage of a bored pile according to claim 1, characterized in that, A pressure sensor is provided at the end of the telescopic component, and the pressure sensor is connected to the controller via the connecting line and sends a pressure signal.

3. The anti-buoyancy device for the reinforcing cage of a bored pile according to claim 1, characterized in that, A displacement sensor is installed inside the main body of the device, and the displacement sensor is connected to the telescopic component and the controller.

4. The method of using the anti-buoyancy device for the reinforcing cage of a bored pile according to claim 1, characterized in that, Step S1. Fix the main body of the device to the steel cage and install the controller on the ground; Step S2. Lower the steel cage into the pile hole until the main body of the device is positioned at the calculated elevation. Step S3. The controller controls the extension of the telescopic component so that the pressure of the telescopic component pressing against the inner wall of the pile hole reaches the design pressure value, or so that the extension length of the telescopic component reaches the design length value. Step S4. Pour concrete into the pile hole; Step S5. The controller controls the telescopic component to return to its original position and the clamping component to release. Ground personnel then pull the main body of the device out of the pile hole via the connecting line.

5. The method of using the anti-buoyancy device for the reinforcing cage of a bored pile according to claim 4, characterized in that, In step S1, the main body of the device is used in pairs, symmetrically positioned with respect to the reinforcing cage and at the same height of the reinforcing cage.

6. The method of using the anti-buoyancy device for the reinforcing cage of a bored pile according to claim 4, characterized in that, In step S2, the main body of the device is at an elevation corresponding to hard clay or rock strata.

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