A steel tubular anti-floatation anchor assembly

Abstract

The application discloses a steel flower pipe type anti-floating anchor rod assembly, which comprises an anchor rod body, a grouting gun and a hole sealing air bag column, a plurality of groups of grouting hole groups are uniformly arranged on the outer circumferential surface of the anchor rod body in the circumferential direction, a plurality of positioning rods are arranged on the top of the anchor rod body in the circumferential direction, the hole sealing air bag column comprises a shell which can be inserted into the anchor rod body, a socket matched with the inserting rod is arranged on the top end of the shell, an air pressure driving assembly is matched and arranged in the shell, shaft holes which are in communication with the internal space of the shell are arranged on the outer side wall of the shell, and the structure of the application is unique and ingenious, and the application can effectively solve the problem that the casing material can enter the anchor rod body when the casing material is poured into the existing hole anti-floating steel flower pipe anchor rod, thereby affecting the grouting quality of the sectional annular grouting and reducing the installation strength of the anchor rod.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of anti-floating anchor rods, and particularly relates to a steel-spiral-pipe type anti-floating anchor rod assembly. BACKGROUND

[0002] The hole-bearing anti-floating steel-spiral-pipe anchor rod is an anti-floating anchor rod used in the field of geological and soil engineering, and is particularly suitable for rapid foundation pit support, engineering rescue and advanced support engineering as a new foundation reinforcement and support measure. Compared with the common steel-spiral-pipe anchor rod, the hole-bearing anti-floating steel-spiral-pipe anchor rod has a certain number and spacing of holes on the outer surface, which are used for consolidation and support with the surrounding soil. During installation, the hole-bearing anti-floating steel-spiral-pipe anchor rod pours a pre-prepared casing material into the gap between the borehole and the anchor rod body. The casing material not only protects the anchor rod body from the erosion of the external environment and prolongs the service life of the anchor rod body, but also strengthens the adhesion between the anchor rod body and the borehole. When performing sectional annular grouting from bottom to top, the slurry penetrates the casing material through the holes on the anchor rod body and penetrates into the surrounding soil, forming adhesion with the soil and increasing the friction and tensile strength between the anchor rod body and the soil. However, in the existing anti-floating steel-spiral-pipe anchor rod, when pouring the casing material into the gap between the borehole and the anchor rod body during installation, the casing material will flow into the anchor rod body through the holes of the anchor rod body, which not only hinders the movement of the grouting gun head, but also interferes with the sealing of the grouting plug on the grouting gun head, affecting the grouting quality of sectional annular grouting and reducing the installation strength of the anchor rod. SUMMARY

[0003] In view of the defects and problems of the existing hole-bearing anti-floating steel-spiral-pipe anchor rod, the application provides a steel-spiral-pipe type anti-floating anchor rod assembly. The anti-floating anchor rod assembly has a unique structure and ingenious design, and can effectively solve the problem that the casing material will enter the anchor rod body when pouring the casing material, affecting the grouting quality of sectional annular grouting and reducing the installation strength of the anchor rod.

[0004] The solution adopted by this invention to solve its technical problem is: a steel pipe-type anti-buoyancy anchor bolt assembly, including an anchor bolt body, a grouting gun, and a sealing airbag column. Multiple sets of grouting holes are evenly arranged along the circumference of the outer ring surface of the anchor bolt body. Multiple positioning rods are arranged along the circumference at the top of the anchor bolt body. The sealing airbag column includes a shell that can be inserted into the anchor bolt body. A socket matching the insertion rod is installed at the top of the shell. A pneumatic drive assembly is matched inside the shell. A shaft hole communicating with the internal space of the shell is provided on the outer walls of the shell. The position and number of the shaft holes correspond to the position and number of grouting holes on the anchor bolt body. A slidable component is installed axially within the shaft hole. The sealing shaft head has its root extending inward into the outer shell and connected to the pneumatic drive assembly. The pneumatic drive assembly can synchronously control all sealing shaft heads to slide outward from the outer shell and insert into the corresponding grouting holes on the anchor rod body to seal the grouting holes. The grouting gun includes a hollow grouting rod with a grout supply pipe inside. The grout supply pipe is connected to a grout supply machine. Two grout-stopping airbag plugs are installed at axial intervals at the bottom end of the hollow grouting rod, facing each other. The hollow grouting rod between the two grout-stopping airbag plugs has a grout discharge hole that communicates with the grout discharge port of the grout supply pipe. When the grout pressure between the two grout-stopping airbag plugs increases, the grout-stopping airbag plugs will be pushed and generate radial expansion.

[0005] The grout stopper includes an annular base and an annular sealing plate that are axially spaced on the hollow grouting rod. The sealing plate can slide along the axial direction of the hollow grouting rod. An annular sealing airbag is fitted on the hollow grouting rod between the base and the annular sealing plate. The sealing airbag is connected to the adjacent base and sealing plate. The sealing airbag is filled with air and expands to drive the base and sealing plate away from each other. The sealing plates of the two grout stoppers are arranged facing each other.

[0006] The outer ring diameter of the base, sealing plate, and annular sealing airbag in its natural state all match the inner ring diameter of the anchor rod.

[0007] The socket includes a socket body fixedly mounted on the top of the housing, the socket body extending outward from the housing and having a vertically aligned insertion hole that matches the positioning rod.

[0008] The pneumatic drive assembly includes a support column installed vertically in the middle of the housing, a cylindrical annular airbag fitted on the support column, the root of the sealing shaft head connected to the outer ring surface of the cylindrical annular airbag, and an air tube connected to the air hole of the cylindrical annular airbag. The air tube extends upward out of the housing and connects to an air source for controlling the expansion and contraction of the cylindrical airbag.

[0009] The sealing shaft head includes a shaft head shell with an open tail end, a cylindrical air bladder, a sleeve rod, and an elastic element. The shaft head shell is slidably installed in the shaft hole, and the tail end of the shaft head shell extends inward into the outer shell and is fitted with an anti-detachment baffle. The sleeve rod is slidably installed in the shaft head shell, and the tail end of the sleeve rod extends rearward out of the shaft head shell and connects to the cylindrical annular air bladder. The cylindrical air bladder is coaxially installed in the shaft head shell on the front side of the sleeve rod, and multiple air bladder openings are evenly provided along the circumference on the shaft head shell on the outer side of the front end of the cylindrical air bladder. The elastic element is fitted onto the sleeve rod on the rear side of the shaft head shell and supports the sleeve rod to prevent it from compressing the cylindrical air bladder under natural sleeve.

[0010] The supporting force of the elastic element is greater than the resistance of the shaft head housing sliding outward along the shaft hole into the grouting hole.

[0011] The beneficial effects of the present invention are as follows: The present invention provides a steel pipe anti-buoyancy anchor bolt assembly, including an anchor bolt body, a grouting gun, and a sealing airbag column. The sealing airbag column includes an outer shell that can be inserted into the anchor bolt body. The top of the outer shell is equipped with a socket that matches the insertion rod. The outer walls of the outer shell are provided with shaft holes that communicate with the internal space of the outer shell. A sealing shaft head is installed in the shaft hole. The sealing shaft head is connected to a pneumatic drive assembly. When the cylindrical annular airbag is inflated by an air source, all sealing shaft heads will be pushed outward during the expansion of the cylindrical annular airbag and slide outward along the shaft hole simultaneously. They are inserted into the corresponding grouting holes on the anchor bolt body to seal the grouting holes on the anchor bolt body. Thus, when the casing material is injected into the gap between the anchor bolt body and the drill hole, the sealing airbag column can seal the grouting holes on the anchor bolt body, preventing the casing material from flowing into the anchor bolt body through the holes in the anchor bolt body.

[0012] The grouting gun includes a hollow grouting rod. Two grout-stopping airbag plugs are installed at axial intervals at the bottom of the hollow grouting rod. The two grout-stopping airbag plugs are arranged facing each other, and the hollow grouting rod between the two grout-stopping airbag plugs is provided with a grout discharge hole that communicates with the grout discharge port of the grout supply pipe. When the grout pressure between the two grout-stopping airbag plugs increases, the grout-stopping airbag plugs will be pushed and generate radial expansion, increasing the sealing pressure between the high-sealing airbag and the inner annular surface of the anchor rod, thereby improving the sealing effect between the grout-stopping plug and the inner annular surface of the anchor rod. This provides sufficient energy storage pressure and sealing for the cement grout to penetrate through the grouting hole, break through the casing material, and penetrate into the surrounding soil layers, thus improving the effect of segmented annular grouting.

[0013] This invention provides a steel perforated tube anti-buoyancy anchor bolt assembly, which is ingeniously designed and can effectively solve the problem that when the casing material is poured into the anchor bolt body during the existing perforated anti-buoyancy steel perforated tube anchor bolt, the casing material will enter the anchor bolt body, affecting the grouting quality of segmented annular grouting and reducing the installation strength of the anchor bolt. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the connection between the sealing airbag column and the anchor rod body of the present invention.

[0016] Figure 3 This is a schematic diagram of the internal structure of the outer shell of the present invention.

[0017] Figure 4 This is a schematic diagram of the anti-slurry airbag plug structure of the present invention.

[0018] Figure 5 This is a schematic diagram of the grouting gun of the present invention in use.

[0019] Figure 6 This is a schematic diagram of the sealing shaft head structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the tube removal support structure of the present invention.

[0021] Figure 8 This is a schematic diagram of the buffer component structure of the present invention.

[0022] The diagram labels are as follows: 1 is the anchor rod body, 11 is the grouting hole, 12 is the positioning rod, 2 is the grouting gun, 21 is the hollow grouting rod, 211 is the grout discharge hole, 22 is the grout-stopping airbag plug, 221 is the annular base, 222 is the annular sealing plate, 223 is the annular sealing airbag, 3 is the sealing airbag column, 31 is the outer shell, 311 is the shaft hole, 32 is the socket, 321 is the socket body, 322 is the insertion hole, and 33 is the pneumatic drive assembly. 331 is the support column, 332 is the cylindrical annular airbag, 34 is the sealing shaft head, 341 is the shaft head shell, 3411 is the airbag opening, 342 is the cylindrical airbag, 343 is the sleeve rod, 344 is the elastic element, 345 is the anti-detachment baffle, 35 is the anti-sway base, 4 is the tube puller bracket, 41 is the support leg, 42 is the platform, 43 is the clamping wheel, 51 is the cylinder body, 52 is the piston, 53 is the pressure adjusting top spring, and 54 is the piston rod. Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0024] To address the issue that during the installation of existing anti-buoyancy steel pipe anchor bolts, when filling the gap between the drilled hole and the anchor bolt body with casing material, the casing material can flow into the anchor bolt body through the holes in the anchor bolt body. This not only hinders the movement of the grouting gun head but also interferes with the sealing of the grout stop plug on the grouting gun head, affecting the grouting quality of segmented annular grouting and reducing the installation strength of the anchor bolt. This embodiment provides a steel pipe type anti-buoyancy anchor bolt assembly, which has a unique structure and ingenious design, such as... Figures 1-5As shown, the anchor rod includes a perforated steel tube anchor rod body 1, a grouting gun 2, and a sealing airbag column 3. The outer ring surface of the anchor rod body 1 is uniformly provided with multiple sets of grouting holes along the circumferential direction. Each set of grouting holes includes multiple grouting holes 11 that are uniformly spaced vertically. The top of the anchor rod body is provided with multiple positioning rods 12 uniformly along the circumference. The number of positioning rods is not less than two. In this embodiment, the number of positioning rods at the top of the anchor rod body is four.

[0025] The sealing airbag column 3 includes a shell 31 that can be inserted into the anchor rod body. The shell 31 is a prism structure with an internal cavity. The number of vertical end faces of the shell 31 is the same as the number of grouting holes on the outer annular surface of the anchor rod body. A socket 32 ​​matching the insertion rod is installed at the top of the shell 31. When the shell is inserted into the anchor rod body, the socket at the top of the shell is connected to the insertion rod, thereby connecting the shell and the anchor rod body together. Specifically:

[0026] The socket 32 ​​includes a socket body 321 fixedly installed on the top of the housing. The socket body extends radially outward from the housing and has a vertically provided insertion hole 322 that matches the positioning rod. There are various ways to connect the socket body 321 to the housing, such as: the socket body and the housing are an integral structure or connected together by bolts and threads. When the housing is connected to the anchor rod body through the socket, the vertical end face of the housing is respectively set towards the corresponding grouting hole group.

[0027] A pneumatic drive assembly 33 is fitted inside the outer casing 31. Shaft holes 311 communicating with the internal space of the outer casing 31 are provided on the outer perimeter walls of the outer casing. The position and number of shaft holes 311 correspond to the position and number of grouting holes on the anchor rod body. That is, when the outer casing is connected to the anchor rod body via a socket, the shaft holes on the outer casing are coaxially aligned with the corresponding grout discharge holes on the anchor rod body. A sealing shaft head 34 is slidably installed axially inside the shaft hole 311. The root of the sealing shaft head extends inward into the outer casing and connects to the pneumatic drive assembly. The pneumatic drive assembly can synchronously control all sealing shaft heads to slide outward from the outer casing and insert into the corresponding grouting holes on the anchor rod body, thus sealing the grouting holes. Specifically:

[0028] The pneumatic drive assembly 33 includes a support column 331 vertically installed in the middle of the outer casing. The upper and lower ends of the support column are connected to the upper and lower inner walls of the outer casing, respectively. The support column can be installed in various ways, for example: the top of the outer casing has a maintenance window communicating with the interior, and a cover plate is installed to seal the maintenance window; the support column is installed inside the outer casing through the maintenance window. A cylindrical annular airbag is fitted onto the support column 311, which supports the cylindrical annular airbag 332, preventing it from remaining vertical when contracted. The root tube of the sealing shaft passes through the shaft hole, extends into the outer casing, and connects to the outer ring surface of the cylindrical annular airbag. An air tube is connected to the air hole of the cylindrical annular airbag, extending upwards out of the outer casing to connect to an air source for controlling the expansion and contraction of the cylindrical airbag. Various types of air sources are available; in this embodiment, a portable dual-mode air pump is used. The pump's operating mode can be switched according to pumping or deflating needs, selecting to inflate the cylindrical annular airbag or deflate it.

[0029] During use, when the cylindrical annular airbag is inflated by an air source, it pushes all the sealing shaft heads outwards during expansion. Simultaneously, the sealing shaft heads slide outwards along the shaft hole and insert into the corresponding grouting holes on the anchor rod body, sealing the grouting holes on the anchor rod body. Thus, when the casing material is injected into the gap between the anchor rod body and the drill hole, the sealing airbag column can seal the grouting holes on the anchor rod body, preventing the casing material from flowing into the anchor rod body through the holes. After the casing material is injected and begins to solidify, the air source can be used to draw air from the cylindrical annular airbag, causing it to contract. During the contraction of the cylindrical annular airbag, the sealing shaft heads are pulled inwards and retracted back into the outer shell. After the sealing shaft heads retract back to their original position, the sealing airbag column can be lifted upwards from the anchor rod body.

[0030] The grouting gun 2 includes a hollow grouting rod 21, inside which is a grout supply pipe connected to a grout supply machine. Two grout-stopping airbag plugs 22 are installed at axial intervals at the bottom end of the hollow grouting rod, facing each other. A grout discharge hole 211, communicating with the grout discharge port of the grout supply pipe, is provided on the hollow grouting rod between the two grout-stopping airbag plugs 22. When the grout pressure between the two grout-stopping airbag plugs increases, the grout-stopping airbag plugs will be pushed and radially expanded. Specifically:

[0031] The grout plug 22 includes an annular base 221 and an annular sealing plate 222, which are axially spaced on the hollow grouting rod. The sealing plate can slide axially along the hollow grouting rod. An annular sealing airbag 223 is fitted onto the hollow grouting rod between the base and the annular sealing plate. The outer ring diameter of the sealing plate and the annular sealing airbag in its natural state matches the inner ring diameter of the anchor rod. The sealing airbag is connected to the adjacent base and sealing plate. The airbag is filled with air and expands to drive the base and sealing plate away from each other. The sealing plates of the two grout plugs are arranged facing each other. When the grouting gun performs segmented annular grouting, the cement grout discharged through the grout discharge hole will first fill the annular grouting rod. As cement grout continues to be discharged, the pressure of the cement grout between the two stop plugs gradually increases, which can break through the casing material and penetrate into the surrounding soil layers, forming a bond with the soil. During this process, the cement grout pushes the sealing plates of the two stop plugs, causing them to squeeze the sealing airbag. The sealing airbag expands outward under the pressure, increasing the sealing pressure between the sealing airbag and the inner annular surface of the anchor rod, thereby improving the sealing effect between the stop plug and the inner annular surface of the anchor rod. This provides sufficient energy storage pressure and sealing for the cement grout to penetrate through the grouting hole, break through the casing material, and penetrate into the surrounding soil layers, thus improving the effect of segmented annular grouting.

[0032] Furthermore, an anti-sway base 35 is installed at the bottom of the outer shell. The diameter of the anti-sway base matches the diameter of the anchor rod body, and the upper and lower edges of the anti-sway base are chamfered to facilitate the insertion and removal of the anchor rod body. Example

[0033] The difference between Example 2 and Example 1 is that the structure of the sealing shaft head is different.

[0034] like Figure 6As shown, the sealing shaft head 34 includes a shaft head shell 341 with an open tail end, a cylindrical airbag 342, a sleeve rod 343, and an elastic element 344. The shaft head shell 341 is slidably installed in the shaft hole 311, and the tail end of the shaft head shell 341 extends inward into the outer shell and is fitted with an anti-detachment baffle 345 to constrain the position of the shaft head shell and prevent it from separating from the outer shell when it extends outward. The sleeve rod 343 is slidably installed in the shaft head shell 341, and the tail end of the sleeve rod 343 extends rearward out of the shaft head shell 341 and is connected to the outer shell. A cylindrical annular airbag 332 is connected; the cylindrical airbag 342 is coaxially installed in the shaft head housing on the front side of the sleeve rod, and multiple airbag openings 3411 are evenly provided along the circumference on the shaft head housing on the outer side of the front end of the cylindrical airbag. The elastic element is fitted onto the sleeve rod on the rear side of the shaft head housing and supports the sleeve rod to keep it from compressing the cylindrical airbag under the natural sleeve. The supporting force of the elastic element is greater than the resistance of the shaft head housing sliding outward along the shaft hole and inserting into the grouting hole. When air is injected into the cylindrical annular airbag through the air source to make it expand, it drives the shaft head to be sealed. When the shaft head housing slides outward and extends into the corresponding grouting hole to seal it, the anti-detachment baffle at the tail end of the shaft head housing will abut against the inner wall of the outer shell. In this state, the anchor rod extends out of the air bladder at the front end of the shaft head housing. When air continues to be injected into the cylindrical annular air bladder through the air source to make it expand, the expanded cylindrical annular air bladder will overcome the resistance of the elastic element and push the sleeve rod back into the shaft head housing. The retracted sleeve rod will squeeze the cylindrical air bladder, causing the front end of the cylindrical air bladder to expand and form an air bladder protrusion on the outside of the shaft head housing through the air bladder opening 3411. When the casing material is injected, it acts as a shield and filler. After the casing material solidifies, the air-filled column is evacuated and pulled out. The area filled by the original air-filled protrusions in the casing material forms an air bubble that communicates with the grouting hole. When the annular grouting breaks through the casing material, the cement slurry will first pass through the grouting hole and enter the air bubble, breaking through the casing material. In this way, the contact area between the cement slurry and the casing material is larger, so the casing material receives a greater supporting force from the cement slurry and is more likely to break through. Example

[0035] The difference between Example 3 and Example 2 is that, as Figure 7 As shown, the steel pipe anti-buoyancy anchor bolt assembly provided in this embodiment also includes a pipe puller 4. The pipe puller 4 includes a platform 42 with supporting legs 41. Two clamping wheels 43 are horizontally spaced on the platform. One of the rollers is connected to a drive motor. The outer ring surfaces of the two clamping wheels are matched with arc-shaped grooves. The inner surface of the grooves is provided with a rubber layer. When in use, the canister of the hollow grouting pipe passes through the two clamping wheels and is inserted into the anchor bolt body. The rubber layer in the arc-shaped grooves of the two clamping wheels is squeezed by the hollow grouting pipe and undergoes elastic deformation, thereby increasing the friction between the hollow grouting pipe and the clamping wheels. When it is necessary to pull upward to adjust the position of the annular grouting, the drive motor is started. The drive motor drives the clamping wheels to rotate, thereby automatically pulling the grouting pipe upward and freeing up manpower.

[0036] Furthermore, the hollow grouting pipe is divided into upper and lower sections, with the upper and lower ends connected by threaded sleeves. The lower section is equipped with a grout-stopping airbag, and the length of the lower section is less than the height of the support leg. Thus, after the annular grouting is completed, the lower section of the hollow grouting pipe can be lifted out of the anchor rod body using the pipe-pulling bracket. The lower section of the hollow grouting pipe under the platform can be screwed to separate it from the upper end, and then the upper end of the hollow grouting pipe between the two clamping wheels can be directly pulled upwards from the pipe-pulling bracket, making disassembly and assembly convenient. Example

[0037] The difference between Example 4 and Example 3 is that, as Figure 8 As shown, the annular sealing airbags of the two anti-slurry airbag plugs 22 are connected to a buffer assembly via air pipes. The buffer assembly includes a cylinder 51 with an internal cavity, and a piston 52 is fitted inside the cylinder. The annular sealing airbags of the two anti-slurry airbag plugs 22 are connected to the cavity of the cylinder on the front side of the piston via air pipes. A pressure adjusting top spring 53 is fitted inside the cavity on the rear side of the piston. A piston rod 54 is provided inside the cylinder on the front side of the piston. The piston rod 54 extends forward out of the cylinder and is connected to a handle. The piston rod is threadedly sealed to the cylinder. The piston rod can be adjusted by rotating the handle. The extension size is adjusted to regulate the extension and contraction of the pressure regulating top spring. Compared with Example 3, the steel flower tube anti-buoyancy anchor bolt assembly provided in this embodiment can adjust the ultimate pressure of the annular sealing airbag in the grout bladder 22 according to the grouting pressure. When the grouting pressure is greater than the ultimate pressure of the annular sealing airbag, the gas in the annular sealing airbag will enter the piston front cylinder through the air pipe under the push of the cement grout, pushing the piston to slide backward and squeeze the pressure regulating top spring, thereby releasing pressure without affecting the sealing of the grout bladder plug.

[0038] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A steel perforated tube type anti-buoyancy anchor bolt assembly, characterized in that, The system includes an anchor bolt body, a grouting gun, and a sealing airbag column. The anchor bolt body has multiple sets of grouting holes evenly distributed circumferentially on its outer ring surface. Multiple positioning rods are located circumferentially at the top of the anchor bolt body. The sealing airbag column includes a shell that can be inserted into the anchor bolt body. A socket matching the insertion rod is installed at the top of the shell. A pneumatic drive assembly is installed inside the shell. Shaft holes communicating with the internal space of the shell are provided on the outer walls of the shell. The position and number of shaft holes correspond to the position and number of grouting holes on the anchor bolt body. A sealing shaft head is slidably installed axially within the shaft hole. The root of the sealing shaft head extends inward into the shell and connects to the pneumatic drive assembly. The pneumatic drive assembly synchronously controls all sealing shaft heads to slide outward from the shell and insert into the corresponding grouting holes on the anchor bolt body, sealing the grouting holes. The grouting gun includes a hollow grouting rod with a grout supply pipe connected to a grout supply machine. Two stop valves are installed at axial intervals at the bottom of the hollow grouting rod. The system includes two grout-stopping airbag plugs facing each other, with a grout discharge hole on a hollow grouting rod between them that communicates with the grout discharge port of the grout supply pipe. When the grout pressure between the two airbag plugs increases, the airbag plugs are pushed and expand radially. The pneumatic drive assembly includes a support column vertically mounted in the middle of the housing, with a cylindrical annular airbag fitted onto the support column. The sealing shaft head includes a shaft head shell with an open tail end, a cylindrical airbag, a sleeve, and an elastic element; the shaft head shell is slidably installed. Inside the shaft hole, the tail end of the shaft head housing extends inward into the outer shell and is fitted with an anti-detachment baffle. The sleeve rod is slidably installed inside the shaft head housing, and the tail end of the sleeve rod extends backward out of the shaft head housing and connects with the cylindrical annular airbag. The cylindrical airbag is coaxially installed inside the shaft head housing on the front side of the sleeve rod, and multiple airbag openings are evenly provided along the circumference on the shaft head housing on the outer side of the front end of the cylindrical airbag. The elastic element is fitted onto the sleeve rod on the rear side of the shaft head housing and supports the sleeve rod to keep it from compressing the cylindrical airbag in its natural state.

2. The steel perforated tube anti-buoyancy anchor bolt assembly according to claim 1, characterized in that, The grout-stopping airbag plug includes an annular base and an annular sealing plate that are axially spaced on the hollow grouting rod. The sealing plate can slide along the axial direction of the hollow grouting rod. An annular sealing airbag is fitted on the hollow grouting rod between the base and the annular sealing plate. The sealing airbag is connected to the adjacent base and sealing plate. The sealing airbag is filled with air and expands to drive the base and the sealing plate away from each other. The sealing plates of the two grout-stopping plugs are arranged facing each other.

3. The steel perforated tube anti-buoyancy anchor bolt assembly according to claim 2, characterized in that, The outer ring diameter of the base, sealing plate, and annular sealing airbag in its natural state all match the inner ring diameter of the anchor rod.

4. The steel perforated tube anti-buoyancy anchor bolt assembly according to claim 1, characterized in that, The socket includes a socket body fixedly mounted on the top of the housing, the socket body extending outward from the housing and having a vertically aligned insertion hole that matches the positioning rod.

5. The steel perforated tube anti-buoyancy anchor bolt assembly according to claim 1, characterized in that, The root of the sealing shaft is connected to the outer ring surface of the cylindrical annular airbag. The air holes of the cylindrical annular airbag are connected to air tubes, which extend upward out of the outer shell and connect to an air source to control the expansion and contraction of the cylindrical airbag.

6. The steel perforated tube anti-buoyancy anchor bolt assembly according to claim 1, characterized in that, The supporting force of the elastic element is greater than the resistance of the shaft head housing sliding outward along the shaft hole into the grouting hole.

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