Self-adaptive climbing type cast-in-place pile post-grouting device

Abstract

The invention relates to a self-adaptive climbing type cast-in-place pile post-grouting device which comprises a grouting guide pipe. The mud jacking core pipe is arranged in the mud jacking guide pipe, two mud jacking plugs are arranged on the mud jacking core pipe, the two mud jacking plugs are arranged in an up-down spaced mode, a core pipe mud outlet is formed in the mud jacking core pipe, and the core pipe mud outlet is formed between the two mud jacking plugs in the up-down direction; the inflating pipe is respectively communicated with the upper mud jacking plug and the lower mud jacking plug; the mud jacking plug comprises an upper connecting flange, a lower connecting flange and a fixed cylinder fixed between the upper connecting flange and the lower connecting flange; annular supporting plates are vertically fixed on the fixed cylinder at intervals; elastic films are arranged between the upper connecting flange and the annular supporting plates, between the adjacent annular supporting plates and between the annular supporting plates and the lower connecting flange in a sealed mode. Rolling supporting units are evenly distributed in the circumferential direction of the annular supporting plate. The rolling supporting units make contact with the inner wall of the grouting guide pipe, and it is avoided that the annular supporting plate is difficult to move up and down due to friction between the annular supporting plate and the grouting guide pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to an adaptive climbing type cast-in-place pile post-grouting device. Background Art

[0002] An effective method for improving the construction impact of bored piles and enhancing the friction resistance of the pile-soil cross section during the pile side post-grouting. In the prior art, for example, the application publication number is CN113373931A, and the invention name is a grouting device with upper and lower ends independently controlled. The grouting operation head includes an upper bulging section and a lower bulging section. A side grouting port connected to the inner wall of the grouting conduit is provided on the outer wall of the grouting conduit. The upper bulging section is located above the side grouting port and the lower bulging section is located below the side grouting port. The upper bulging section and the lower bulging section can both be inflated by inflation so that the outer walls of the two sides fit the inner wall of the grouting conduit, thereby forming a grouting chamber between the upper and lower bulging sections. During grouting, the upper and lower bulging sections need to move up and down in the grouting conduit. The diameters of the upper and lower bulging sections are almost equal to the inner diameter of the grouting conduit. When the upper and lower bulging sections move up and down, they often produce sliding friction with the inner wall of the grouting conduit, making it difficult to lower them. Especially when the grouting conduit is long and the verticality is deviated, it is easy to get stuck and cannot be grouted smoothly. Summary of the invention

[0003] In view of this, the object of the present invention is to provide an adaptive climbing cast-in-place pile post-grouting device to solve the technical problem in the prior art that the upper and lower swelling sections are difficult to move up and down relative to the grouting conduit.

[0004] To achieve the above purpose, the technical solution adopted by the adaptive climbing cast-in-place pile post-grouting device of the present invention is: A distributed grouting device for cast-in-place piles, comprising: The grouting conduit is used to be fixed on the steel cage, the grouting conduit is extended in the up-down direction, and the side wall of the grouting conduit is provided with a plurality of grouting outlets at intervals in the up-down direction; A grouting core pipe is arranged in the grouting conduit, two grouting plugs are arranged on the grouting core pipe, the two grouting plugs are arranged at intervals up and down, and a core pipe grouting outlet is opened on the grouting core pipe, and the core pipe grouting outlet is arranged between the two grouting plugs in the up and down direction; An air filling pipe is arranged in the grouting conduit, the air filling pipe passes through the upper grouting plug and extends into the lower grouting plug, and exhaust ports are respectively arranged on the air filling pipe at corresponding positions of the upper grouting plug and the lower grouting plug; The grouting plug comprises an upper connecting flange, a lower connecting flange, and a fixing tube fixed between the upper connecting flange and the lower connecting flange; an annular supporting plate is fixed at intervals above and below the fixing tube; A plurality of annular support plates are arranged between the upper connecting flange and the lower connecting flange at intervals in the upper and lower directions; An elastic membrane is sealed between the upper connecting flange and the annular support plate, between adjacent annular support plates, and between the annular support plate and the lower connecting flange, and the elastic membrane is arranged outside the fixing cylinder; Rolling support units are evenly distributed around the annular support plate.

[0005] Beneficial effect: The distributed grouting device of the bored pile of the present invention includes an annular support plate fixed in the extension direction of the fixed tube, and rolling support units are evenly distributed in the circumference of the annular support plate. When the grouting core tube and the two grouting plugs move up and down relative to the grouting conduit, the rolling support units will contact the inner wall of the grouting conduit, thereby avoiding the difficulty of the annular support plate moving up and down due to friction between the annular support plate and the grouting conduit; in addition, in the present application, elastic membranes are sealed between the upper connecting flange and the annular support plate, between adjacent annular support plates, and between the annular support plate and the lower connecting flange. When an air port is inflated into the grouting plug, the elastic membrane expands and forms a top pressure sealing contact with the grouting conduit, so that the grouting plug forms a blockage on the grouting conduit. Not only that, the elastic membranes are arranged at intervals. After expansion, the elastic membrane forms a number of annular top pressure membrane cavities in the extension direction of the grouting conduit, and the several annular top pressure membrane cavities respectively form top pressure with the inner wall of the grouting conduit, which increases the fixing stability of the grouting plug relative to the grouting conduit.

[0006] Furthermore, the annular support plate is provided with mounting grooves evenly distributed along the circumference, and the rolling support unit is arranged in the mounting groove; the rolling support unit includes a partition fixed in the mounting groove, a guide block is provided in the mounting groove for guiding sliding, the guide block is telescopically arranged in the mounting groove, and a ball is rotatably arranged on the side of the guide block facing away from the partition.

[0007] Beneficial effects: The balls in the rolling support unit can roll and contact with the inner wall of the grouting conduit, thereby ensuring that the friction of the rolling support unit is smaller when it moves up and down relative to the grouting conduit; in addition, since the balls can move relative to the diameter direction of the annular support plate, the diameter of the rolling support unit can be changed, so that the grouting plug can adapt to the inclination change of the conduit when the grouting conduit moves. If there is a protruding structure on the inner wall of the grouting conduit, the balls of the rolling support unit can also move relative to the mounting groove together with the guide block, that is, even if the balls are retracted into the mounting groove, after passing through the protruding structure, the balls and the guide block extend out of the mounting groove again and contact the grouting conduit.

[0008] Furthermore, the partition is spaced apart relative to the bottom of the mounting groove, a spring is installed between the guide block and the partition, a guide column is fixed on the guide block, the guide column passes through the spring, a guide hole for the guide column to pass through is opened on the partition, a limiting block is fixed at one end of the guide column away from the guide block, and the limiting block is arranged between the partition and the bottom of the mounting groove.

[0009] Beneficial effect: when the ball and the guide block are squeezed, they will move inward along the installation groove, compressing the spring at the same time, and the guide column will move toward the bottom of the installation groove relative to the guide hole. When the ball and the guide block are no longer squeezed, the spring will reset, and the spring will push the guide block and the ball to move in the direction away from the bottom of the installation groove, so that the ball will extend out of the installation groove; the structure is reasonably set up, which can enable the rolling support unit on the annular support plate to be able to adaptively expand and contract according to the specific conditions of the inner wall of the grouting conduit, so that the grouting plug can move up and down relative to the grouting conduit more smoothly.

[0010] The fixing cylinder is provided with an air vent which penetrates inside and outside, and a connecting spring is fixed between the elastic membrane and the fixing cylinder.

[0011] Beneficial effects: The setting of the vent hole enables the high-pressure gas entering the fixed cylinder to fill the elastic membrane through the vent hole, causing the elastic membrane to expand; the setting of the connecting spring enables the elastic membrane to be smoothly retracted under the action of the retraction of the connecting spring after the gas in the sealing structure is released.

[0012] The grout outlet is connected to a pile side grouting valve, and the pile side grouting valve comprises a grouting shell threadedly connected to the grout outlet, and a flow outlet is opened on the circumference of the grouting shell. A grouting channel and a receiving cavity connected to the grouting channel are provided in the grouting shell, and the receiving cavity and the grouting channel form a flaring structure; The grouting shell is threadedly connected with a mounting core, the mounting core is arranged in the accommodating cavity of the grouting shell, an annular flow space is formed between the mounting core and the grouting shell, and the outflow port is connected with the annular flow space; The installation core is provided with an installation cavity facing the slurry outlet channel, a telescopic block is arranged in the installation cavity to guide the sliding seal, a sealing ball is fixed at the front end of the telescopic block, a telescopic structure is arranged between the telescopic block and the installation cavity, and the telescopic block can be telescopically adjusted along the installation cavity so that the sealing ball can seal the slurry outlet channel.

[0013] Beneficial effect: The setting of the pile side grouting valve can make the slurry flow out smoothly from the pile side grouting valve when the grouting core tube is grouting. When the grouting core tube is no longer grouting, the telescopic block can be moved toward the slurry outlet channel of the grouting shell under the action of the telescopic structure, so that the sealing ball can block the slurry outlet channel.

[0014] Furthermore, the telescopic structure is a telescopic spring arranged between the telescopic block and the bottom of the installation cavity.

[0015] Beneficial effect: The telescopic structure is simple to set up.

[0016] Furthermore, a protective cover is provided on the outside of the grouting shell, a connecting rod is fixed on the telescopic block, a socket is opened on the mounting core, the connecting rod passes through the telescopic spring and extends from the socket, and the protective cover is fixedly connected to one end of the connecting rod.

[0017] Beneficial effect: When the grouting core tube is grouting, the slurry flows out from the slurry outlet channel and pushes the sealing ball at the same time, so that the sealing ball and the telescopic block move inside the installation cavity, and the spring is compressed. At this time, the protective cover moves relative to the grouting shell under the action of the connecting rod, thereby exposing the outflow port on the grouting shell to the outside, making it convenient for the slurry to flow out from the outflow port.

[0018] Furthermore, the protective cover includes a circular bottom and a hollow cylindrical cover body fixedly connected to the circular bottom, and the end of the connecting rod is fixed at the center of the circular bottom.

[0019] Beneficial effect: The structural setting of the protective cover is simple and reasonable, and can effectively block the outflow port on the grouting shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a post-grouting device of an adaptive climbing cast-in-place pile of the present invention when the elastic membrane does not expand; Figure 2 yes Figure 1 A partial enlarged view of point A in a post-grouting device of an adaptive climbing cast-in-place pile; Figure 3 It is a structural schematic diagram of an adaptive climbing cast-in-place pile post-grouting device of the present invention when the elastic membrane expands; Figure 4 yes Figure 3 A partial enlarged view of point B in a post-grouting device of an adaptive climbing cast-in-place pile; Figure 5 It is a partial structural schematic diagram of a grouting plug of a post-grouting device of an adaptive climbing cast-in-place pile of the present invention; Figure 6 It is a structural schematic diagram of an annular support plate and a rolling support unit of a post-grouting device of an adaptive climbing cast-in-place pile of the present invention; Figure 7 It is a structural schematic diagram of a pile side grouting valve of a self-adaptive climbing cast-in-place pile post-grouting device of the present invention.

[0021] Figure markings: 1-grouting catheter; 2-grouting core tube; 3-upper grouting plug; 4-lower grouting plug; 5-core tube grouting outlet; 6-pile side grouting valve; 7-first inflation tube; 9-fixing tube; 10-elastic membrane; 11-connecting spring; 12-upper connecting flange; 13-lower connecting flange; 14-annular support plate; 15-ball; 16-vent; 17-mounting groove; 18-partition; 19-guide block; 20-spring; 21-guide column; 22-limiting block; 23-grouting shell; 24-slurry outlet channel; 25-accommodating chamber; 26-mounting core; 27-mounting chamber; 28-telescopic block; 29-sealing ball; 30-telescopic spring; 31-connecting rod; 32-jack; 33-outlet; 34-circular bottom; 35-cover body. DETAILED DESCRIPTION

[0022] The following is a further detailed description of an adaptive climbing cast-in-place pile post-grouting device of the present invention in conjunction with the accompanying drawings and specific embodiments: like Figure 1-Figure 7 As shown, an adaptive climbing cast-in-place pile post-grouting device of the present invention includes a grouting conduit 1, which is fixed on a steel cage, and is extended in the up-down direction. The grouting conduit 1 is threadedly connected by a plurality of pipe sections, and a plurality of grouting outlets are arranged at intervals in the up-down direction on the side wall of the grouting conduit 1. A pile-side grouting valve 6 is arranged in connection with the grouting outlet. A grouting core pipe 2 is arranged in the grouting conduit 1, and two grouting plugs are arranged on the grouting core pipe 2, and the two grouting plugs are arranged at intervals up and down. A core pipe grouting outlet 5 is opened on the grouting core pipe 2, and the core pipe grouting outlet 5 is arranged between the two grouting plugs in the up-down direction; in this embodiment, the two grouting plugs are an upper grouting plug 3 and a lower grouting plug 4, respectively, and the upper grouting plug 3 and the lower grouting plug 4 have the same structure.

[0023] An air filling pipe 7 is arranged in the grouting conduit 1. The air filling pipe 7 passes through the upper grouting plug 3 and extends into the lower grouting plug 4. Exhaust ports are arranged on the air filling pipe 7 at corresponding positions of the upper grouting plug and the lower grouting plug.

[0024] In this embodiment, the inflation tube 7 passes through the upper grouting plug 3 and is sealedly connected to the upper grouting plug 3 .

[0025] The two grouting plugs can be filled with gas through the inflation tubes respectively. After being filled with gas, the two grouting plugs expand in the grouting conduit 1, thereby forming a slurry storage cavity between the two grouting plugs. Slurry is poured downward from the grouting core tube 2, and the slurry flows out from the core tube slurry outlet 5 and is temporarily stored in the slurry storage cavity. When the slurry storage cavity is full of slurry, it is discharged through the slurry outlet on the grouting conduit 1.

[0026] In this embodiment, the grouting plug includes an upper connecting flange 12, a lower connecting flange 13, and a fixed tube 9 fixed between the upper connecting flange 12 and the lower connecting flange 13. The fixed tube 9 is provided with a vent hole 16 that passes through inside and outside; an annular support plate 14 is fixed to the fixed tube 9 at intervals above and below. That is, the upper connecting flange 12, the lower connecting flange 13, the fixed tube 9, and the annular support plate 14 form a supporting structure of the grouting plug, ensuring that the grouting plug has a strong structural stability. A plurality of annular support plates 14 are arranged between the upper connecting flange 12 and the lower connecting flange 13 at intervals above and below. In this embodiment, three annular support plates 14 are arranged at intervals above and below on the fixed tube 9.

[0027] Elastic membranes 10 are sealed between the upper connecting flange 12 and the annular support plate 14, between adjacent annular support plates 14, and between the annular support plate 14 and the lower connecting flange 13. The elastic membranes 10 are arranged on the outside of the fixed tube 9, and the elastic membranes 10 are arranged in an annular shape on the outside of the fixed tube 9. That is, in this embodiment, the upper grouting plug 3 and the lower grouting plug 4 respectively include four elastic membranes 10. After the high-pressure gas is filled into the grouting plug, the elastic membrane 10 expands and squeezes on the inner wall of the grouting conduit 1. The elastic membrane 10 forms a number of annular top pressure membrane cavities in the extension direction of the grouting conduit 1. The several annular top pressure membrane cavities respectively form top pressure with the inner wall of the grouting conduit 1, forming a blockage on the inner wall of the grouting tube 1, and at the same time, the blocking structure is fixed relative to the grouting conduit 1, thereby increasing the fixing stability of the grouting plug relative to the grouting conduit 1.

[0028] In order to enable the elastic membrane 10 to shrink and reset quickly after expansion, in this embodiment, a connecting spring 11 is fixed between the elastic membrane 10 and the fixing tube 9. In other embodiments, the connecting spring 11 can also be configured as an elastic rib.

[0029] In this embodiment, the annular support plate 14 is arranged radially outside the fixed tube 9, and the diameter of the annular support plate 14 is larger than the diameters of the upper connecting flange 12 and the lower connecting flange 13, so that the annular support plate 14 is the outermost structure of the grouting plug. The annular support plate 14 is evenly provided with rolling support units in the circumferential direction. In this embodiment, the annular support plate 14 is evenly provided with mounting grooves 17 in the circumferential direction, and the rolling support units are arranged in the mounting grooves 17. The rolling support units will contact the inner wall of the grouting conduit 1, thereby avoiding the difficulty of the annular support plate 14 moving up and down due to friction between the annular support plate 14 and the grouting conduit 1.

[0030] The rolling support unit includes a partition 18 fixed to the mounting groove 17, a guide block 19 is provided in the mounting groove 17 for guiding and sliding, the guide block 19 is telescopically provided in the mounting groove 17, and a ball 15 is rotatably provided on the side of the guide block 19 away from the partition 18. The partition 18 is spaced relative to the bottom of the mounting groove 17, a spring 20 is installed between the guide block 19 and the partition 18, a guide column 21 is fixed on the guide block 19, the guide column 21 passes through the spring 20, a guide hole for the guide column 21 to pass through is provided on the partition 18, a limit block 22 is fixed on the end of the guide column 21 away from the guide block 19, and the limit block 22 is provided between the partition 18 and the bottom of the mounting groove 17. In this embodiment, the guide column 21 passes through the cavity in the center of the spring 20. The limit block 22 is larger than the size of the guide hole, so that when the guide block 19 moves outward relative to the installation slot 17 under the return action of the spring 20, the limit block 22 cooperates with the guide hole to prevent the guide block 19 from escaping from the installation slot 17.

[0031] When the ball 15 and the guide block 19 are squeezed by foreign matter on the inner wall of the grouting conduit 1, they will move inward along the mounting groove 17, compressing the spring 20 at the same time, and the guide column 21 will move toward the bottom of the mounting groove 17 relative to the guide hole, so that the ball 15 can avoid the foreign matter on the inner wall of the grouting conduit 1.

[0032] When the ball 15 and the guide block 19 are no longer squeezed by foreign matter on the inner wall of the grouting conduit 1, the spring 20 is reset, and the spring 20 pushes the guide block 19 and the ball 15 to move in the direction away from the bottom of the mounting groove 17, so that the ball 15 extends from the mounting groove 17, and the ball 15 continues to roll in contact with the inner wall of the grouting conduit 1, reducing the resistance of the grouting plug in the grouting conduit 1; in this embodiment, the rolling support unit structure is reasonably arranged, which can make the rolling support unit on the annular support plate 14 adaptively expand and contract according to the specific conditions of the inner wall of the grouting conduit 1, so that the grouting plug moves up and down more smoothly relative to the grouting conduit 1. In the present invention, the ball can move in the diameter direction relative to the annular support plate, so that the diameter of the rolling support unit can be changed, so that the grouting plug can adapt to the inclination change of the pipeline when the grouting conduit moves, and it is convenient for the grouting plug to move up and down relative to the grouting conduit.

[0033] The grout outlet is connected to a pile side grouting valve 6, which includes a grouting shell 23 threadedly connected to the grout outlet, and a flow outlet 33 is provided in the circumference of the grouting shell 23. In this embodiment, a plurality of flow outlets 33 are evenly distributed in the circumference of the grouting shell 23; a grouting channel 24 and a receiving cavity 25 connected to the grouting channel 24 are provided in the grouting shell 23, and the receiving cavity 25 and the grouting channel 24 form a flared structure. A mounting core 26 is threadedly connected to the grouting shell 23, and the mounting core 26 is disposed in the receiving cavity 25 of the grouting shell 23. An annular circulation space is formed between the mounting core 26 and the grouting shell 23, and the flow outlet 33 is connected to the annular circulation space. The installation core 26 is provided with an installation cavity 27 facing the slurry outlet channel 24, a telescopic block 28 is provided in the installation cavity 27 to guide the sliding seal, a blocking ball 29 is fixed to the front end of the telescopic block 28, a telescopic structure is provided between the telescopic block 28 and the installation cavity 27, and the telescopic block 28 can be adjusted along the installation cavity 27 so that the blocking ball 29 blocks the slurry outlet channel 24. In this embodiment, the telescopic structure is a telescopic spring 30 provided at the bottom of the telescopic block 28 and the installation cavity 27, an annular groove is provided at one end of the telescopic block 28 away from the blocking ball 29, one end of the telescopic spring 30 is provided in the annular groove, and the other end of the telescopic spring 30 is provided at the bottom of the installation cavity 27.

[0034] A protective cover is provided on the outside of the grouting shell 23, and the protective cover includes a circular bottom 34 and a hollow cylindrical cover body 35 fixedly connected to the circular bottom 34. A connecting rod 31 is fixed on the telescopic block 28, and a socket 32 ​​is provided on the mounting core 26. The connecting rod 31 passes through the telescopic spring 30 and extends from the socket 32. The protective cover is fixedly connected to one end of the connecting rod 31. In this embodiment, the end of the connecting rod 31 is fixed at the center of the circular bottom 34.

[0035] When the grouting core tube 2 is grouting, the slurry flows out from the slurry outlet channel 24 and pushes the blocking ball 29, so that the blocking ball 29 and the telescopic block 28 move toward the inside of the installation cavity 27, and the telescopic spring 30 is compressed. At this time, the connecting rod 31 moves with the telescopic block 28, and the protective cover moves relative to the grouting shell 23 under the action of the connecting rod 31, thereby exposing the outflow port 33 on the grouting shell 23 to the outside, which facilitates the slurry to flow out from the outflow port 33. After the grouting is completed, the telescopic spring 30 is reset, and the telescopic spring 30 presses the telescopic block 28 to move outside the installation cavity 27 until the blocking ball 29 on the telescopic block 28 blocks the slurry outlet channel 24. At the same time, the telescopic block 28 drives the connecting rod 31 to move toward the slurry outlet channel 24, and the connecting rod 31 drives the protective cover to move, so that the cover body 35 of the protective cover blocks the outflow port 33 on the grouting shell 23, preventing external impurities from entering the pile side grouting valve from the outflow port 33.

[0036] In the above embodiment, the rolling support unit may also be a ball rotatably arranged on the annular support plate. In this case, there is no need to provide a mounting groove on the annular support plate.

[0037] In the above embodiment, the partition is spaced relative to the bottom of the mounting groove, a spring is installed between the guide block and the partition, a guide column is fixed on the guide block, the guide column passes through the spring, a guide hole for the guide column to pass through is opened on the partition, and a limiting block is fixed at the end of the guide column away from the guide block; in other embodiments, the guide column and the guide hole may not be set, and only a spring may be set between the guide block and the partition.

[0038] In the above embodiment, a ventilation hole is provided on the fixed cylinder, and a connecting spring is fixed between the elastic membrane and the fixed cylinder. In other embodiments, the ventilation hole can also be a ventilation grille; the connecting spring between the elastic membrane and the fixed cylinder may not be provided.

[0039] In the above embodiment, the pile side grouting valve includes a grouting shell threadedly connected to the grouting outlet, the grouting shell is provided with an outflow outlet in the circumferential direction, a slurry outlet channel and an accommodating chamber connected to the slurry outlet channel are arranged in the grouting shell, and the accommodating chamber and the slurry outlet channel form a flaring structure; a mounting core is threadedly connected to the grouting shell, the mounting core is arranged in the accommodating chamber of the grouting shell, an annular flow space is formed between the mounting core and the grouting shell, and the outflow outlet is connected to the annular flow space; the mounting core is provided with an mounting cavity facing the slurry outlet channel, a telescopic block is arranged in the mounting cavity for guiding sliding sealing, a sealing ball is fixed at the front end of the telescopic block, a telescopic structure is arranged between the telescopic block and the mounting cavity, and the telescopic block can be telescopically adjusted along the mounting cavity so that the sealing ball blocks the slurry outlet channel; in other embodiments, the pile side grouting valve can also be of other structural forms.

[0040] In the above embodiment, the telescopic structure is a telescopic spring arranged between the telescopic block and the bottom of the installation cavity; in other embodiments, the telescopic structure may also be other elastically telescopic structures.

[0041] In the above embodiment, a protective cover is provided on the outside of the grouting shell, a connecting rod is fixed on the telescopic block, a socket is provided on the mounting core, the connecting rod passes through the telescopic spring and extends from the socket, and the protective cover is fixedly connected to one end of the connecting rod; in other embodiments, the protective cover may not be provided.

[0042] In the above embodiment, the protective cover includes a circular bottom and a hollow cylindrical cover body fixedly connected to the circular bottom, and the end of the connecting rod is fixed at the center of the circular bottom; in other embodiments, the protective cover may also include a hollow cylindrical cover body and a circular connecting frame fixed to the bottom of the cover body, and the connecting rod is fixedly connected to the connecting frame.

Claims

1. An adaptive climbing cast-in-place pile post-grouting device, characterized in that: include: The grouting conduit is used to be fixed on the steel cage, the grouting conduit is extended in the up-down direction, and the side wall of the grouting conduit is provided with a plurality of grouting outlets at intervals in the up-down direction; A grouting core pipe is arranged in the grouting conduit, two grouting plugs are arranged on the grouting core pipe, the two grouting plugs are arranged at intervals up and down, and a core pipe grouting outlet is opened on the grouting core pipe, and the core pipe grouting outlet is arranged between the two grouting plugs in the up and down direction; An air filling pipe is arranged in the grouting conduit, the air filling pipe passes through the upper grouting plug and extends into the lower grouting plug, and exhaust ports are respectively arranged on the air filling pipe at corresponding positions of the upper grouting plug and the lower grouting plug; The grouting plug comprises an upper connecting flange, a lower connecting flange, and a fixing tube fixed between the upper connecting flange and the lower connecting flange; an annular supporting plate is fixed at intervals above and below the fixing tube; A plurality of annular support plates are arranged between the upper connecting flange and the lower connecting flange at intervals in the upper and lower directions; An elastic membrane is sealed between the upper connecting flange and the annular support plate, between adjacent annular support plates, and between the annular support plate and the lower connecting flange, and the elastic membrane is arranged outside the fixing cylinder; Rolling support units are evenly distributed around the annular support plate.

2. The self-adaptive climbing cast-in-place pile post-grouting device according to claim 1 is characterized in that: The annular support plate is provided with mounting grooves evenly distributed along the circumferential direction, and the rolling support unit is arranged in the mounting grooves; The rolling support unit comprises a partition fixed in a mounting groove, a guide block is provided in the mounting groove for guiding and sliding, the guide block is telescopically arranged in the mounting groove, and a ball is rotatably arranged on a side of the guide block away from the partition.

3. The adaptive climbing cast-in-place pile post-grouting device according to claim 2 is characterized in that: The partition is arranged relative to the bottom of the installation groove, a spring is installed between the guide block and the partition, a guide column is fixed on the guide block, the guide column passes through the spring, a guide hole for the guide column to pass through is opened on the partition, a limit block is fixed at one end of the guide column away from the guide block, and the limit block is arranged between the partition and the bottom of the installation groove.

4. An adaptive climbing cast-in-place pile post-grouting device according to any one of claims 1-3, characterized in that: The fixing cylinder is provided with an air vent which penetrates inside and outside, and a connecting spring is fixed between the elastic membrane and the fixing cylinder.

5. An adaptive climbing cast-in-place pile post-grouting device according to any one of claims 1-3, characterized in that: The grout outlet is connected to a pile side grouting valve, and the pile side grouting valve comprises a grouting shell threadedly connected to the grout outlet, and a flow outlet is opened on the circumference of the grouting shell. A grouting channel and a receiving cavity connected to the grouting channel are provided in the grouting shell, and the receiving cavity and the grouting channel form a flaring structure; The grouting shell is threadedly connected with a mounting core, the mounting core is arranged in the accommodating cavity of the grouting shell, an annular flow space is formed between the mounting core and the grouting shell, and the outflow port is connected with the annular flow space; The installation core is provided with an installation cavity facing the slurry outlet channel, a telescopic block is arranged in the installation cavity to guide the sliding seal, a sealing ball is fixed at the front end of the telescopic block, a telescopic structure is arranged between the telescopic block and the installation cavity, and the telescopic block can be telescopically adjusted along the installation cavity so that the sealing ball can seal the slurry outlet channel.

6. The self-adaptive climbing cast-in-place pile post-grouting device according to claim 5 is characterized in that: The telescopic structure is a telescopic spring arranged at the bottom of the telescopic block and the installation cavity.

7. The self-adaptive climbing cast-in-place pile post-grouting device according to claim 6 is characterized in that: A protective cover is arranged outside the grouting shell, a connecting rod is fixed on the telescopic block, a socket is opened on the mounting core, the connecting rod passes through the telescopic spring and extends from the socket, and the protective cover is fixedly connected to one end of the connecting rod.

8. The self-adaptive climbing cast-in-place pile post-grouting device according to claim 7 is characterized in that: The protective cover comprises a circular bottom and a hollow cylindrical cover body fixedly connected to the circular bottom, and the end of the connecting rod is fixed at the center of the circular bottom.

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