A pipe pile end inside and outside post grouting device

Abstract

The application relates to the technical field of precast pile foundations, improves the problem that the prior art is greatly influenced by welding technology, and discloses a pipe pile end inner-outer post-grouting device which comprises a first connecting layer, a second connecting layer, a closed ring piece and a plurality of grouting pipes; the first connecting layer is connected with the pile end, and the second connecting layer is connected with the pipe pile; the opposite ends of the first connecting layer and the second connecting layer are respectively provided with first butt columns and second butt columns; the first butt columns and the second butt columns are connected; the closed ring piece is detachably connected with the first connecting layer and the second connecting layer; a pouring space is left between the inner wall of the closed ring piece and the outer walls of the second butt columns and the first butt columns; the plurality of grouting pipes penetrate through the first connecting layer and the second connecting layer along the length direction of the pipe pile; the grouting pipes comprise pipe bodies and a plurality of pipe sections; the plurality of pipe sections are coaxially and spacedly arranged; the pipe body is a continuous pipeline, and the pipe body coaxially penetrates through the plurality of pipe sections. The application can ensure the sealing performance in the pipe pile sinking process and reduce the uncertainty of the welding technology.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of precast pile foundations, and in particular to a pipe pile end internal and external post-grouting device. BACKGROUND

[0002] As an important foundation engineering technology, precast pile foundations play a vital role in modern construction, transportation, water conservancy and other engineering fields. The precast pile foundation has the advantages of fast construction speed, stable and reliable quality, strong adaptability and the like, and has become an indispensable part of many large engineering projects.

[0003] In the prior art, a precast pile foundation includes a pile end and a plurality of pile segments. The plurality of pile segments are connected in a shape of a pile foundation main body, and the pile end is arranged at one end of the pile foundation main body. The pile end is located at the top of the pile body and is used for connecting with an upper structure and transferring loads. The shape and size of the pile end are designed according to specific engineering requirements to ensure good connection with the upper structure and load transfer. The pile end and the plurality of pile segments are connected by welding or mechanical bolt connection, and the pile end adopts a cross steel plate pile tip welded with the pile body or an integrated concrete pile tip.

[0004] According to the related art, the two kinds of pile tips have advantages and disadvantages: the integrated concrete pile tip can ensure that underground water and soil do not flow into the gap of the pile body, and ensure the bearing capacity of the pile. However, the pile tip concrete is easy to break during the pile driving process or the post-process static load process when it encounters hard stones or rocks. The cross steel plate pile tip is welded with the pile body, and the welding between the pile end and the pile segment needs to rely on the experience of welders to ensure that the joint is complete and sealed. If the welding deviates, the water or silt in the soil under the action of pressure is easy to squeeze into the gap inside the precast pile from the weld, resulting in a decrease in the structural strength of the precast pile foundation. SUMMARY

[0005] In order to improve the defect that the structural strength is unstable due to the uncertainty of the welding technology in the prior art, the application provides a pipe pile end internal and external post-grouting device.

[0006] The following technical scheme is adopted:

[0007] The utility model provides a pipe pile end inside and outside post grouting device, first connecting layer, second connecting layer, closed ring piece and a plurality of grouting pipes, the first connecting layer connects the pile end, second connecting layer connects the pipe pile, the opposite end of first connecting layer and second connecting layer is provided with first butt joint column and second butt joint column respectively, first butt joint column and second butt joint column are connected, closed ring piece is coaxially arranged outside first butt joint column and second butt joint column, closed ring piece can be dismantled and connects first connecting layer and second connecting layer, the inner wall of closed ring piece and the outer wall between second butt joint column and first butt joint column leave pouring space, a plurality of grouting pipes penetrate first connecting layer and second connecting layer along the length direction of pipe pile and distribute outside first butt joint column and second butt joint column, the grouting pipe includes pipe body and a plurality of pipe sections, a plurality of pipe sections are coaxially and interval arranged, a plurality of pipe sections penetrate and connect corresponding first connecting layer or second connecting layer, the pipe body is continuous pipeline, and the pipe body penetrates a plurality of pipe sections coaxially.

[0008] Through the above technical scheme, the first connecting layer and the second connecting layer are connected with the pile end and the pipe pile respectively, and a stable connection structure is realized. The design of the first butt joint column and the second butt joint column makes the connection more compact, and the two are further fixed by the closed ring piece to ensure the sealing performance during the sinking process of the pipe pile. At the same time, the pouring space between the inner wall of the closed ring piece and the outer wall of the butt joint column provides the necessary space for subsequent grouting, to further increase the sealing performance of the pipe pile.

[0009] Optionally, the closed ring piece includes a first ring body and a second ring body arranged in an upper-lower manner, the first ring body is connected with the first connecting layer, and the second ring body is connected with the second connecting layer.

[0010] Through the above technical scheme, the closed ring piece is divided into a first ring body and a second ring body arranged in an upper-lower manner, and is connected with the first connecting layer and the second connecting layer respectively. This split design makes the installation more flexible and enhances the stability of the whole.

[0011] Optionally, the first connecting layer is provided with a plurality of first connecting blocks in an annular array outside the first butt joint column, the first ring body is formed by a plurality of first arc bodies connected in a head-tail manner, each first arc body corresponds to a first connecting block, the first arc body is provided with a first groove for horizontally inserting the first connecting block, a first bolt penetrates the outside of the first arc body, and the first bolt is threadedly connected with the first connecting block after penetrating the first arc body.

[0012] Optionally, the second connecting layer is provided with a plurality of second connecting blocks outside the annular array of the second butt joint columns, the second ring body is formed by a plurality of second arc bodies connected end to end, each second arc body corresponds to a second connecting block, the second arc body is provided with a second groove for horizontally inserting the second connecting block, and the second arc body is penetrated by a second bolt which is threadedly connected with the second connecting block after penetrating the second arc body.

[0013] By adopting the above technical scheme, the reliable connection of the closed ring piece is realized through the cooperation of the first connecting block and the second connecting block with the corresponding first arc body and the second arc body and the fastening effect of the bolt.

[0014] Optionally, it further comprises a filling ring bag, the filling ring bag is made of rubber material, the filling ring bag is surrounded in the pouring space, one end of the filling ring bag is provided with a grouting pipe, and the grouting pipe is provided through along the length direction of the pipe pile.

[0015] By adopting the above technical scheme, the design of the filling ring bag is introduced, which is surrounded in the pouring space and grouted through the grouting pipe, thereby further enhancing the sealing performance and effect of the grouting.

[0016] Optionally, the first connecting layer is provided with a first receiving groove for slidingly immersing the first ring body into the surface of the first connecting layer; the first connecting block is slidingly connected in the first receiving groove; and the first butt joint column is provided with a first control assembly for driving the movement of the plurality of first connecting blocks.

[0017] Optionally, the first control assembly comprises a first screw rod, a first sleeve ring and a plurality of first connecting rods; the first screw rod is coaxially and rotationally connected in the first butt joint column; the first sleeve ring is sleeved on the first screw rod and is threadedly connected with the first screw rod; the first butt joint column is circumferentially and arrayed provided with a plurality of first accommodating grooves, the first accommodating grooves are provided along the length direction of the first butt joint column; one end of each of the plurality of first connecting rods is connected with the first sleeve ring, and the other end of each of the plurality of first connecting rods is connected with the corresponding first connecting block through the corresponding first accommodating groove.

[0018] Optionally, the second connecting layer is provided with a second receiving groove for slidingly immersing the second ring body into the surface of the second connecting layer; the second connecting block is slidingly connected in the second receiving groove; and the second butt joint column is provided with a second control assembly for driving the movement of the plurality of second connecting blocks.

[0019] Optionally, the second control assembly comprises a second screw rod, a second collar and a plurality of second connecting rods; the second screw rod is coaxially connected to the second butt joint column; the second collar is sleeved on the second screw rod and is threadedly connected with the second screw rod; the second butt joint column is circumferentially arrayed with a plurality of second accommodating grooves, and the second accommodating grooves are arranged along the length direction of the second butt joint column; one end of each of the plurality of second connecting rods is connected to the second collar, and the other end of each of the plurality of second connecting rods passes through a corresponding second accommodating groove and is connected to a corresponding second connecting block.

[0020] By adopting the above technical scheme, the introduction of the first control assembly and the second control assembly enables the first connecting block and the second connecting block to automatically move under the driving of the first screw rod and the second screw rod.

[0021] Optionally, the first screw rod and the second screw rod are coaxially and throughly provided with a linkage groove, and a linkage rod is arranged in the linkage groove.

[0022] By adopting the above technical scheme, the linkage groove and the linkage rod are designed to enable the first screw rod and the second screw rod to synchronously rotate.

[0023] In summary, the present application has at least one of the following beneficial effects:

[0024] 1. The two are further fixed by the closed ring sheet to ensure the sealing performance during the sinking process of the pipe pile, and to reduce the welding seam caused by the insufficient welding technology;

[0025] 2. The pouring space between the inner wall of the closed ring sheet and the outer wall of the butt joint column provides a necessary space for subsequent grouting, so as to further increase the sealing performance of the pipe pile;

[0026] 3. The filling ring capsule is expanded to the outside of the extension surface of the outer wall of the pipe pile under the pressure of the concrete, so as to compress the surrounding soil, and fill the gap around the soil, the filling ring capsule and the pouring space through the grouting pipe, so as to further increase the stability of the pipe pile. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the embodiment after being installed into the pipe pile;

[0028] Figure 2 is a front view of the embodiment;

[0029] Figure 3 is an enlarged structural schematic diagram of A;

[0030] Figure 4 is a top view of the first control assembly;

[0031] Figure 5 is a sectional view of the grouting pipe position of the embodiment;

[0032] Figure 6 is a schematic structural view of a filling ring capsule position of the embodiment;

[0033] Figure 7 is a schematic structural view of an enlarged structure at B.

[0034] Explanation of reference numerals: 1, pipe pile; 11, pile end; 2, first connecting layer; 21, first receiving groove; 22, first butt joint column; 221, first accommodation groove; 3, second connecting layer; 31, second receiving groove; 32, second butt joint column; 321, second accommodation groove; 41, closed ring piece; 42, pouring space; 43, grouting pipe; 431, pipe body; 432, pipe joint; 5, first ring body; 51, first arc body; 511, first groove; 512, first screw hole; 513, first countersunk hole; 514, first insertion hole; 52, first bolt; 53, first connecting block; 6, second ring body; 61, second arc body; 611, second groove; 612, second screw hole; 613, second countersunk hole; 614, second insertion hole; 62, second bolt; 63, second connecting block; 71, first screw rod; 711, first rotating ring; 72, linkage groove; 73, first sleeve ring; 74, first connecting rod; 81, second screw rod; 811, second rotating ring; 82, second sleeve ring; 83, second connecting rod; 9, filling ring capsule; 91, adapter pipe head; 911, branch pipe; 912, pipe head body; 92, grouting pipe. DETAILED DESCRIPTION

[0035] The following will be described in detail below with reference to the accompanying drawings. Figure 1 to the accompanying drawings. Figure 7 The present application will be further described in detail.

[0036] Reference will be made to Figures 1 to 5, in order to reduce the instability caused by the difference between the welding technology of the pile end 11 and the pipe pile 1, which leads to the penetration of water and silt into the weld during the exploration process of the pipe pile 1 under the action of the pressure, affecting the structural stability of the pipe pile 1. The embodiment of the application discloses a pipe pile end internal and external post-grouting device, which comprises a first connecting layer 2, a second connecting layer 3, a closed ring sheet 41 and a plurality of grouting pipes 43. The first connecting layer 2 is connected to the end face of the pile end 11, and the end of the first connecting layer 2 away from the pile end 11 is provided with a first butt joint column 22, and the diameter of the first butt joint column 22 is smaller than the diameter of the first connecting layer 2. The second connecting layer 3 is connected to one end of the pipe pile 1 for connecting the pile end 11, and the second connecting layer 3 is provided with a second butt joint column 32 at the opposite segment of the first connecting layer 2. After the first butt joint column 22 and the second butt joint column 32 abut against each other, the edges of the first butt joint column 22 and the second butt joint column 32 are connected by welding. The closed ring sheet 41 is coaxially arranged outside the connection between the first butt joint column 22 and the second butt joint column 32, and the closed ring sheet 41 can be detachably connected to the first connecting layer 2 and the second connecting layer 3. The closed ring sheet 41 wraps the external space of the first butt joint column 22 and the second butt joint column 32. The inner wall of the closed ring sheet 41 and the outer wall of the second butt joint column 32 and the first butt joint column 22 leave a pouring space 42. A plurality of grouting pipes 43 are embedded in the pipe pile 1 along the length direction of the pipe pile 1, the grouting pipes 43 penetrate the first connecting layer 2 and the second connecting layer 3, and are distributed outside the first butt joint column 22 and the second butt joint column 32. The grouting pipes 43 are located in the pouring space 42. The grouting pipes 43 comprise a pipe body 431 and a plurality of pipe joints 432. The plurality of pipe joints 432 are arranged at intervals along the length direction of the pipe pile 1, the pipe joints 432 are integrated with the pipe pile 1 by concrete pouring, and the two ends of the pipe joints 432 respectively penetrate the corresponding first connecting layer 2 or second connecting layer 3. The pipe body 431 is a continuous pipe structure, and the pipe body 431 coaxially penetrates the plurality of pipe joints 432. During prefabrication, the first connecting layer 2 is integrally arranged with the pile end 11, the pile end 11 is a cross or conical structure, a plurality of steel bars are welded on the surface of the second connecting layer 3, the second connecting layer 3 is integrally poured with the pipe pile 1 through the steel bars, and the pipe joints 432 are pre-embedded. Then, the first butt joint column 22 and the second butt joint column 32 are butted and welded, and the pipe body 431 is penetrated. Then, the closed ring sheet 41 is detachably connected outside the pouring space 42 to close the pouring space 42. During installation, the pile end 11 is taken as the beginning and is penetrated into the hole, at this time, the closed ring sheet 41 plays a role in blocking silt, after the pipe pile 1 is placed in the hole, concrete is poured through the pipe body 431, so that the concrete fills the gap, and the pipe body 431 is poured and pulled away at the same time, in this way, the erosion of water is prevented, and the stability of the pipe pile 1 is further strengthened.

[0037] Reference Figure 2 and Figure 3The closed ring sheet 41 comprises a first ring body 5 and a second ring body 6 arranged in sequence, the first ring body 5 is connected with the first connecting layer 2, and the second ring body 6 is connected with the second connecting layer 3. A plurality of first connecting blocks 53 are arranged in an annular array on the surface of the first connecting layer 2 relative to the circumference of the first butt joint column 22. The first ring body 5 is formed by a plurality of first arc bodies 51 connected end to end, each first arc body 51 corresponds to a first connecting block 53, the first arc body 51 is provided with a first recess 511 for horizontally inserting the first connecting block 53, the first arc body 51 is provided with a first screw hole 512 penetrating the surface thereof, the first screw hole 512 is in communication with the first recess 511, and the first connecting block 53 is provided with a first insertion hole 514 corresponding to the first screw hole 512. The first ring body 5 is provided with a first bolt 52, the first bolt 52 penetrates the first screw hole 512 and enters the first insertion hole 514, and is threadedly connected with the first ring body 5 and the first connecting block 53. The first ring body 5 is provided with a first countersunk hole 513, and the nut of the first bolt 52 is located in the first countersunk hole 513. A plurality of second connecting blocks 63 are arranged in an annular array on the surface of the second connecting layer 3 relative to the circumference of the second butt joint column 32. The second connecting block 63 is arranged opposite to the first connecting block 53. The second ring body 6 is formed by a plurality of second arc bodies 61 connected end to end, each second arc body 61 corresponds to a second connecting block 63, the second arc body 61 is provided with a second recess 611 for horizontally inserting the second connecting block 63, the second arc body 61 is provided with a second screw hole 612 penetrating the surface thereof, the second screw hole 612 is in communication with the second recess 611, and the second connecting block 63 is provided with a second insertion hole 614 corresponding to the second screw hole 612. The second ring body 6 is provided with a second bolt 62, the second bolt 62 penetrates the second screw hole 612 and enters the second insertion hole 614, and is threadedly connected with the second ring body 6 and the second connecting block 63. The second ring body 6 is provided with a second countersunk hole 613, and the nut of the second bolt 62 is located in the second countersunk hole 613.

[0038] With reference to Figures 2 to 6 In order to further increase the stability of the pipe pile 1 in the soil, especially during the process of the pipe pile 1 penetrating into the hole, the relative movement of the pipe pile 1 to the hole is easy to cause the structural collapse of the hole wall, and too much gap between the pipe pile 1 and the hole may cause the settlement or deviation of the pipe pile 1. The pipe pile end internal and external post-grouting device further comprises a filling ring bag 9 made of rubber material and capable of expanding after the injection of concrete. The filling ring bag 9 surrounds the pouring space 42, and the filling ring bag 9 is elastic due to the rubber material. After the first butt joint column 22 and the second butt joint column 32 are welded, the filling ring bag 9 is expanded from the pile end 11 to be sleeved into the pouring space 42. One end of the filling ring bag 9 is provided with a grouting pipe 92 arranged along the length direction of the pipe pile 1, and the grouting pipe 92 is embedded in the pipe pile 1.

[0039] Further, the first connecting layer 2 is provided with a first receiving groove 21 for the first ring body 5 to slide into the surface of the first connecting layer 2, and the first connecting block 53 is slidingly connected in the first receiving groove 21. The first control assembly for driving the movement of the first connecting block 53 is arranged in the first docking column 22. The first control assembly comprises a first screw rod 71, a first sleeve ring 73 and a plurality of first connecting rods 74. The first screw rod 71 is coaxially and rotationally connected in the first docking column 22, and the first screw rod 71 is provided with a first rotating ring 711 at an end away from the second docking column 32, and the first screw rod 71 is rotationally connected with the first docking column 22 through the first rotating ring 711. The first sleeve ring 73 is sleeved on the first screw rod 71 and is threadedly connected with the first screw rod 71. The first docking column 22 is circumferentially and arrayed with a plurality of first displacement grooves 221, the first displacement grooves 221 are arranged along the length direction of the first docking column 22, and the positions of the plurality of first displacement grooves 221 correspond to the positions of the plurality of first connecting blocks 53. The plurality of first connecting rods 74 are connected at one end with the first sleeve ring 73, and are connected at the other end with the corresponding first connecting block 53 through the corresponding first displacement groove 221. By rotating the first screw rod 71, the first sleeve ring 73 can be driven to move, so that the first ring body 5 slides into the first receiving groove 21, thereby exposing the filling ring capsule 9, and the filling ring capsule 9 is expanded to the outside of the outer wall extension surface of the pipe pile 1 under the pressure of the concrete, so as to compress the surrounding soil, and fill the gap around the soil, the filling ring capsule 9 and the pouring space 42 through the grouting pipe 43, thereby further increasing the stability of the pipe pile 1.

[0040] Similarly, the second connecting layer 3 is provided with a second receiving groove 31 for the second ring body 6 to slide into the surface of the second connecting layer 3, and the second connecting block 63 is slidingly connected in the second receiving groove 31. The second control assembly for driving the movement of the second connecting block 63 is arranged in the second docking column 32. The second control assembly comprises a second screw rod 81, a second sleeve ring 82 and a plurality of second connecting rods 83. The second screw rod 81 is coaxially and rotationally connected in the second docking column 32, and the second screw rod 81 is provided with a second rotating ring 811 at two ends away from the second docking column 32, and the second screw rod 81 is rotationally connected with the second docking column 32 through the second rotating ring 811. The second sleeve ring 82 is sleeved on the second screw rod 81 and is threadedly connected with the second screw rod 81. The second docking column 32 is circumferentially and arrayed with a plurality of second displacement grooves 321, the second displacement grooves 321 are arranged along the length direction of the second docking column 32, and the positions of the plurality of second displacement grooves 321 correspond to the positions of the plurality of second connecting blocks 63. The two ends of the plurality of second connecting rods 83 are connected with the second sleeve ring 82, and the other two ends are connected with the corresponding second connecting block 63 through the corresponding second displacement groove 321. The first connecting block 53 and the second connecting block 63 slide in the direction of approaching or moving away from each other. The threads of the first screw rod 71 and the second screw rod 81 are oppositely arranged.

[0041] Further, the first screw rod 71 and the second screw rod 81 are coaxially provided with a linkage groove 72, and a linkage rod is arranged in the linkage groove 72. The linkage rod is polygonal in cross section, and the linkage groove 72 is polygonal in cross section. In the embodiment, the polygon is a cross.

[0042] With reference to Figure 7 Further, the filling ring bag 9 is provided with an adapter pipe head 91 at one end, and the filling ring bag 9 is connected to a grouting pipe 92 through the adapter pipe head 91. The adapter pipe head 91 comprises a branch pipe 911 connected to the inside of the filling ring bag 9, and a pipe head body 912 rotatable relative to the branch pipe 911. The grouting pipe 92 is provided with external threads on the outer wall of one end, and the end can be inserted into the pipe head body 912. The pipe head body 912 is rotatably connected to the branch pipe 911 at one end, and extends outward at the other end and is provided with internal threads corresponding to the external threads.

[0043] It is worth noting that the grouting device can not only be applied to the pile end 11, but also can be applied to the connection part of the divided pipes when the pipe pile 1 is produced in sections. It is only necessary to connect the grouting pipe 92 and the grouting pipe 43.

[0044] The implementation principle of the embodiment of the pipe pile end internal and external back grouting device is as follows:

[0045] First, the pile end 11 is inserted into the hole, and the sealing ring 41 plays a role in blocking the silt at this time. After the pipe pile 1 is placed in the hole, the first sleeve 73 can be driven to move by rotating the first screw rod 71, so that the first ring body 5 is slid into the first receiving groove 21, so as to expose the filling ring bag 9, and the filling ring bag 9 is pressurized and expanded to the outside of the pipe pile 1 outer wall extension surface, so as to compress the surrounding soil, and fill the gap between the soil, the filling ring bag 9 and the pouring space 42 through the grouting pipe 43.

[0046] The above are preferred embodiments of the present application, and are not limited to the protection scope of the present application. Therefore, equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A device for internal and external post-grouting of the end of a pipe pile, characterized in that: The utility model provides a kind of pipe pile and pile end connection structure, including first connecting layer (2), second connecting layer (3), closed ring sheet (41) and several grouting pipes (43);The first connecting layer (2) connects pile end (11), and the second connecting layer (3) connects pipe pile (1);The opposite end of the first connecting layer (2) and the second connecting layer (3) is respectively provided with first butt column (22) and second butt column (32);The first butt column (22) and the second butt column (32) are connected;The closed ring sheet (41) is coaxially arranged on the outside of the first butt column (22) and the second butt column (32), and the closed ring sheet (41) can be detachably connected to the first connecting layer (2) and the second connecting layer (3);The inner wall of the closed ring sheet (41) and the outer wall of the second butt column (32) and the first butt column (22) leave pouring space (42) between them;Several grouting pipes (43) penetrate the first connecting layer (2) and the second connecting layer (3) along the length direction of pipe pile (1), and are distributed on the outside of the first butt column (22) and the second butt column (32);The grouting pipe (43) includes pipe body (431) and several pipe sections (432);Several pipe sections (432) are coaxially and spaced apart, and several pipe sections (432) penetrate and connect corresponding first connecting layer (2) or second connecting layer (3);The pipe body (431) is a continuous pipe, and the pipe body (431) penetrates several pipe sections (432) coaxially;The closed ring sheet (41) includes first ring body (5) and second ring body (6) arranged above and below, the first ring body (5) is connected to the first connecting layer (2), and the second ring body (6) is connected to the second connecting layer (3);The first connecting layer (2) is arranged with a plurality of first connecting blocks (53) in annular array outside the first butt column (22), the first ring body (5) is formed by a plurality of first arc bodies (51) connected end to end, each first arc body (51) corresponds to a first connecting block (53), the first arc body (51) is provided with a first groove (511) for horizontally inserting the first connecting block (53), and a first bolt (52) penetrates the outside of the first arc body (51), and the first bolt (52) is threadedly connected to the first connecting block (53) after penetrating the first arc body (51);The second connecting layer (3) is arranged with a plurality of second connecting blocks (63) in annular array outside the second butt column (32), the second ring body (6) is formed by a plurality of second arc bodies (61) connected end to end, each second arc body (61) corresponds to a second connecting block (63), the second arc body (61) is provided with a second groove (611) for horizontally inserting the second connecting block (63), and a second bolt (62) penetrates the outside of the second arc body (61), and the second bolt (62) is threadedly connected to the second connecting block (63) after penetrating the second arc body (61).

2. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 1, characterized in that: Also include a filling ring bag (9), the filling ring bag (9) is rubber material, the filling ring bag (9) is surrounded in the pouring space (42), one end of the filling ring bag (9) is provided with a grouting pipe (92), the grouting pipe (92) is through the tubular pile (1) length direction and is provided.

3. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 2, characterized in that: The first connecting layer (2) is provided with a first receiving groove (21) for the first ring body (5) to slide into the surface of the first connecting layer (2); the first connecting block (53) is slidingly connected in the first receiving groove (21); the first control assembly is arranged in the first connecting column (22) and drives the movement of the first connecting block (53).

4. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 3, characterized in that: The first control assembly comprises a first screw rod (71), a first sleeve ring (73) and a plurality of first connecting rods (74); the first screw rod (71) is coaxially connected in the first connecting column (22); the first sleeve ring (73) is sleeved on the first screw rod (71) and is threadedly connected with the first screw rod (71); the first connecting column (22) is circumferentially provided with a plurality of first accommodating grooves (221), and the first accommodating grooves (221) are arranged along the length direction of the first connecting column (22); one end of each of the first connecting rods (74) is connected to the first sleeve ring (73), and the other end of each of the first connecting rods (74) is connected to the corresponding first connecting block (53) through the corresponding first accommodating groove (221).

5. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 4, characterized in that: The second connecting layer (3) is provided with a second receiving groove (31) for the second ring body (6) to slide into the surface of the second connecting layer (3); the second connecting block (63) is slidingly connected in the second receiving groove (31); the second control assembly is arranged in the second connecting column (32) and drives the movement of the second connecting block (63).

6. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 5, characterized in that: The second control assembly comprises a second screw rod (81), a second sleeve ring (82) and a plurality of second connecting rods (83); the second screw rod (81) is coaxially connected in the second connecting column (32); the second sleeve ring (82) is sleeved on the second screw rod (81) and is threadedly connected with the second screw rod (81); the second connecting column (32) is circumferentially provided with a plurality of second accommodating grooves (321), and the second accommodating grooves (321) are arranged along the length direction of the second connecting column (32); one end of each of the second connecting rods (83) is connected to the second sleeve ring (82), and the other end of each of the second connecting rods (83) is connected to the corresponding second connecting block (63) through the corresponding second accommodating groove (321).

7. The device for back grouting inside and outside of the pile tip of tubular pile according to claim 6, characterized in that: The first screw rod (71) and the second screw rod (81) are coaxially and throughly provided with a linkage groove (72), and a linkage rod is arranged in the linkage groove (72).

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