Grouting device of cast-in-situ bored pile

Abstract

The utility model relates to the technical field of constructional engineering construction, and discloses a grouting device of a cast-in-situ bored pile, which comprises a pile body, a driver connecting block is rotatably connected inside the pile body, a rotating shaft is fixedly connected to one side of the outer wall of the driver connecting block, a plurality of threaded grooves are formed in the outer wall of the rotating shaft, and the driver connecting block is fixedly connected with the rotating shaft. A plurality of moving rings are arranged in the pile body, the interiors of the moving rings are in threaded connection to the outer walls of the threaded grooves, the outer walls of the moving rings are rotationally connected with transmission rods in an annular array, one sides of the transmission rods are rotationally connected with extrusion plates, the outer walls of the extrusion plates are slidably connected to the interior of the pile body, and clamping groove assemblies are arranged on the outer wall of the pile body. According to the cast-in-situ bored pile grouting fixing device, the extrusion plate is pushed by the transmission rod to slide outwards, so that soil on the side wall is pressed tightly, the friction force is increased through cooperation of the second edge groove and the first edge groove, the problem that the fixing is not firm due to stress relaxation of peripheral soil is solved, and the stability of grouting fixing of a cast-in-situ bored pile is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering construction, in particular to a grouting device for bored cast-in-place piles. Background Art

[0002] In order to strengthen the foundation and enhance the bearing capacity, bored piles are usually used. It forms holes in the ground and then injects concrete or other grouting materials into the holes to form a solid column to improve the bearing capacity and stability of the foundation. In order to inject concrete or grouting materials into the holes, a grouting device or other methods can be used to ensure that the grouting material fully fills the hole and fits tightly to the hole wall.

[0003] After searching, a pile end grouting device is disclosed in the announcement number: CN202273229U, including a temporary conduit arranged in sequence from top to bottom, a grouting pipe connected to the temporary conduit through a connecting sleeve, and a grouting pipe welded to the grouting pipe as an integral whole. The top of the temporary conduit is connected to a cap body with a hook by a thread. The grouting pipe comprises an outer sleeve, an inner sleeve and a spiral metal wire arranged on the inner sleeve. A plurality of grouting holes are provided on the grouting pipe, and a conical plug is provided at the end of the grouting pipe. The beneficial effects of the utility model are as follows: the temporary conduit, the grouting pipe, and the grouting pipe cooperate to complete the grouting process of the deep and long piles; the grouting pipe comprises an outer sleeve, an inner sleeve and a spiral metal wire, and has a reasonable structure and a long service life; the setting of the temporary conduit can be used as an ultrasonic detection tube. The deep and long piles in this application are prone to cause stress relaxation of the surrounding soil when drilling before insertion, thereby reducing the friction resistance around the pile side. The soil stress relaxation will cause the density of the soil around the pile side to decrease, thereby reducing the friction resistance on the pile side, which will directly affect the bearing capacity of the pile, thereby reducing the bearing performance of the pile foundation. Utility Model Content

[0004] In order to remedy the above deficiencies, the utility model provides a grouting device for bored cast-in-place piles, aiming to improve the problem in the prior art that deep and long piles are prone to cause stress relaxation of the surrounding soil when drilling before insertion, reduce the friction resistance around the pile side, and reduce the bearing capacity of the pile foundation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A grouting device for bored piles, comprising a pile body, wherein a driver connecting block is rotatably connected inside the pile body, a rotating shaft is fixedly connected to one side of an outer wall of the driver connecting block, a plurality of thread grooves are provided on the outer wall of the rotating shaft, a plurality of moving rings are arranged inside the pile body, the moving rings are threadedly connected to the outer wall of the thread groove, a ring-shaped array of transmission rods are rotatably connected to the outer wall of the moving rings, an extrusion plate is rotatably connected to one side of the transmission rod, the outer wall of the extrusion plate is slidably connected to the inside of the pile body, and a slot assembly is provided on the outer wall of the pile body;

[0007] Through the above technical solution, the rotating shaft is driven by the driver connecting block, and the threaded groove on the outer wall of the rotating shaft drives the movable ring to move downward, thereby pushing the extrusion plate to slide outward through the transmission rod, thereby compacting the soil on the side wall and cooperating with the side groove 2 and the side groove 1 to increase its friction.

[0008] As a further description of the above technical solution:

[0009] The slot assembly comprises a first side slot and a second side slot, wherein the first side slot is arranged on the outer wall of the pile body, the second side slot is arranged on the outer wall of the pile body, and the second side slot is arranged on the inner wall of the first side slot;

[0010] Through the above technical solution, the side trough 1 and the side trough 2 can make the soil accumulate.

[0011] As a further description of the above technical solution:

[0012] The bottom of the pile body is fixedly connected with a bottom column, the interior of the bottom column is slidably connected with a fixing plate, and the bottom of the rotating shaft is fixedly connected with a threaded column;

[0013] Through the above technical solution, the bottom column can drive the threaded column to rotate.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the bottom column is provided with a circular array of sliding grooves 1, the outer wall of the fixing plate is slidably connected to the inside of the sliding grooves 1, and the outer wall of the threaded column is threadedly connected to the inside of the fixing plate;

[0016] Through the above technical solution, the threaded column can drive the fixing plate inside the slide groove.

[0017] As a further description of the above technical solution:

[0018] A pressure hammer is fixedly connected to the bottom of the fixed plate, the outer wall of the pressure hammer is slidably connected to the inside of the bottom column, a limiting block is fixedly connected to the bottom of the threaded column, a second slide groove is opened inside the pressure hammer, and the outer wall of the limiting block is slidably connected to the inside of the second slide groove;

[0019] Through the above technical solution, the loose soil can be compacted by the pressure hammer.

[0020] As a further description of the above technical solution:

[0021] The pile body is provided with a first annular array of grouting grooves, the outer wall of the bottom column is provided with a second annular array of grouting grooves, and the fixing plate is fixedly connected with a connecting pipe of an annular array;

[0022] Through the above technical solution, grouting can be carried out through grouting groove one and grouting groove two.

[0023] As a further description of the above technical solution:

[0024] One end of the connecting pipe is fixedly connected to the second grouting tank, and the bottom end of the connecting pipe is fixedly connected to a nozzle;

[0025] Through the above technical solution, the nozzles can be connected via the connecting pipe.

[0026] As a further description of the above technical solution:

[0027] The outer wall of the nozzle is fixedly connected to the inner wall of the pressure hammer, and the interior of the fixing plate is fixedly connected to the barrier net of the annular array;

[0028] Through the above technical solution, the barrier net can prevent soil from entering.

[0029] The utility model has the following beneficial effects:

[0030] 1. In the utility model, the rotating shaft is first driven by the driver connecting block, and the threaded groove on the outer wall of the rotating shaft drives the moving ring to move downward, thereby pushing the extrusion plate to slide outward through the transmission rod, so that the soil on the side wall is compacted, and the friction force is increased by cooperating with the side groove 2 and the side groove 1, thereby solving the problem that the stress relaxation of the surrounding soil will lead to its loose fixation, and improving the stability of the grouting fixation of the bored pile.

[0031] 2. In the utility model, the threaded column is first driven to rotate by the rotating shaft, and then the threaded column drives the fixed plate to slide downward, thereby pushing the pressure hammer to move downward to compact the bottom loose soil, and then the nozzle is used for grouting, which solves the problem that the loose soil at the bottom of the pile body will affect the grouting effect and improves the grouting quality of the grouting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional schematic diagram of a grouting device for bored piles proposed by the utility model;

[0033] Figure 2 This is a schematic diagram of the column cross-section structure of a grouting device for bored piles proposed by the utility model;

[0034] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0035] Figure 4 The utility model provides a schematic diagram of the cross-sectional structure of a bottom column of a grouting device for bored piles.

[0036] Legend:

[0037] 1. Pile body; 2. Driver connecting block; 3. Grouting groove one; 4. Side groove one; 5. Side groove two; 6. Extrusion plate; 7. Bottom column; 8. Rotating shaft; 9. Threaded groove; 10. Barrier net; 11. Moving ring; 12. Transmission rod; 13. Threaded column; 14. Grouting groove two; 15. Connecting pipe; 16. Fixed plate; 17. Slide groove one; 18. Pressure hammer; 19. Nozzle; 20. Limit block; 21. Slide groove two. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Reference Figure 1-Figure 3 A grouting device for bored piles comprises a pile body 1, wherein a driver connecting block 2 is rotatably connected inside the pile body 1, a rotating shaft 8 is fixedly connected to one side of the outer wall of the driver connecting block 2, a plurality of thread grooves 9 are provided on the outer wall of the rotating shaft 8, a plurality of moving rings 11 are arranged inside the pile body 1, the moving rings 11 are threadedly connected to the outer wall of the thread groove 9, a transmission rod 12 of an annular array is rotatably connected to the outer wall of the moving ring 11, an extrusion plate 6 is rotatably connected to one side of the transmission rod 12, the outer wall of the extrusion plate 6 is slidably connected to the inside of the pile body 1, a card slot assembly is provided on the outer wall of the pile body 1, the card slot assembly comprises a side slot 1 4 and a side slot 2 5, the side slot 1 4 is provided on the outer wall of the pile body 1, the side slot 2 5 is provided on the outer wall of the pile body 1, and the side slot 2 5 is provided on the inner wall of the side slot 1 4;

[0040] Specifically, the driver connection block 2 can be inserted into the drilled hole and driven by connecting to the driving device. The driver connection block 2 can drive the rotating shaft 8 to rotate. The rotating shaft 8 has a threaded groove 9 on its outside, which can drive the moving ring 11 to move downward. The moving ring 11 will drive the transmission rod 12, so that the transmission rod 12 applies force to the extrusion plate 6. In this way, the extrusion plate 6 will be pushed out of the pile body 1. The pushing out of the extrusion plate 6 will compact the surrounding soil, and the extruded soil will accumulate inside the side groove 2 5 and the side groove 1 4, which further enhances the friction coefficient of the pile body 1, so that the pile body 1 is more firmly fixed on the ground.

[0041] Reference Figure 2-Figure 4The bottom of the pile body 1 is fixedly connected with a bottom column 7, a fixed plate 16 is slidably connected inside the bottom column 7, a threaded column 13 is fixedly connected with the bottom of the rotating shaft 8, a circular array of slide grooves 17 are opened on the inner wall of the bottom column 7, the outer wall of the fixed plate 16 is slidably connected inside the slide groove 17, the outer wall of the threaded column 13 is threadedly connected inside the fixed plate 16, a pressure hammer 18 is fixedly connected to the bottom of the fixed plate 16, the outer wall of the pressure hammer 18 is slidably connected inside the bottom column 7, a limiting block 20 is fixedly connected to the bottom of the threaded column 13, a slide groove 21 is opened inside the pressure hammer 18, and the outer wall of the limiting block 20 is slidably connected inside the slide groove 21;

[0042] Specifically, when the rotating shaft 8 rotates, the movement of the rotating shaft 8 will drive the fixed plate 16 to move. At the same time, the fixed plate 16 slides inside the slide groove 17 to limit the movement trajectory of the fixed plate 16. The fixed plate 16 moves downward under the force of the threaded column 13. At the same time, the pressure hammer 18 at the bottom of the fixed plate 16 will squeeze and compact the loose soil at the bottom of the pile body 1. A slide groove 21 is provided inside the pressure hammer 18, so that the limit block 20 fixed at the bottom of the threaded column 13 can slide inside the slide groove 21 to prevent the pressure hammer 18 from slipping off the threaded column 13.

[0043] Reference Figure 2-Figure 4 A circular array of grouting grooves 1 3 is provided inside the pile body 1, a circular array of grouting grooves 2 14 is provided on the outer wall of the bottom column 7, a circular array of connecting pipes 15 are fixedly connected inside the fixing plate 16, one end of the connecting pipe 15 is fixedly connected to the grouting grooves 2 14, a nozzle 19 is fixedly connected to the bottom end of the connecting pipe 15, the outer wall of the nozzle 19 is fixedly connected to the inner wall of the pressure hammer 18, and a circular array of barrier nets 10 are fixedly connected inside the fixing plate 16;

[0044] Specifically, during the grouting process, the grouting can be injected through the grouting groove 1 3 inside the pile body 1, and then flow into the grouting groove 2 14 inside the bottom column 7. Through the connecting pipe 15, the grouting can be guided to the inside of the nozzle 19 and sprayed by the nozzle 19. The nozzle 19 is fixed on the pressure hammer 18 and moves as the pressure hammer 18 extends out of the bottom column 7. At the same time, a barrier net 10 is set on the periphery of the pressure hammer 18 to prevent soil from entering the inside of the nozzle 19 and causing blockage.

[0045] Working principle: after the driver connecting block 2 is inserted into the drilled hole, the driving device can be connected through the driver connecting block 2, and the rotating shaft 8 can be driven to rotate through the driver connecting block 2, and the threaded groove 9 on the outer wall of the rotating shaft 8 can drive the moving ring 11 to move downward, and then the moving ring 11 drives the transmission rod 12, so that the force of the transmission rod 12 acts on the extrusion plate 6, thereby pushing the extrusion plate 6 out of the pile body 1, and the extrusion plate 6 will press the surrounding soil, and the extruded soil will accumulate in the side groove 2 5 and the side groove 1 4, thereby further enhancing the friction coefficient of the pile body 1, making the pile body 1 more firmly fixed, and when the rotating shaft 8 rotates, the rotation of the rotating shaft 8 will drive the fixed plate 16 to move, and at the same time, the fixed plate 16 slides in the slide groove 17, thereby limiting the fixed plate 16's movement trajectory, the fixed plate 16 will move downward under the force of the threaded column 13, and at the same time, the pressure hammer 18 at the bottom of the fixed plate 16 will squeeze and compact the loose soil at the bottom of the pile body 1, and a slide groove 21 is arranged inside the pressure hammer 18, so that the limit block 20 fixed at the bottom of the threaded column 13 slides inside the slide groove 21, thereby preventing the pressure hammer 18 from slipping off the threaded column 13. When grouting, it can be injected from the grouting groove 13 inside the pile body 1, and when it flows into the grouting groove 2 14 inside the bottom column 7, it can be introduced into the nozzle 19 through the connecting pipe 15, and sprayed by the nozzle 19. The nozzle 19 is fixed on the pressure hammer 18 and can extend out of the bottom column 7 with the pressure hammer 18. A barrier net 10 is arranged on the periphery of the pressure hammer 18 to prevent soil from entering the nozzle 19 and causing blockage.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grouting device for bored piles, comprising a pile body (1), characterized in that: The pile body (1) is rotatably connected to a driver connection block (2) inside, and a rotating shaft (8) is fixedly connected to one side of an outer wall of the driver connection block (2), and a plurality of thread grooves (9) are provided on the outer wall of the rotating shaft (8). A plurality of moving rings (11) are provided inside the pile body (1), and the moving rings (11) are threadedly connected to the outer walls of the thread grooves (9). The outer walls of the moving rings (11) are rotatably connected to transmission rods (12) in an annular array, and one side of the transmission rod (12) is rotatably connected to an extrusion plate (6), and the outer wall of the extrusion plate (6) is slidably connected to the inside of the pile body (1). A slot assembly is provided on the outer wall of the pile body (1).

2. A grouting device for bored piles according to claim 1, characterized in that: The slot assembly comprises a side slot 1 (4) and a side slot 2 (5); the side slot 1 (4) is arranged on the outer wall of the pile body (1); the side slot 2 (5) is arranged on the outer wall of the pile body (1); and the side slot 2 (5) is arranged on the inner wall of the side slot 1 (4).

3. A grouting device for bored piles according to claim 1, characterized in that: The bottom of the pile body (1) is fixedly connected to a bottom column (7), a fixing plate (16) is slidably connected inside the bottom column (7), and the bottom of the rotating shaft (8) is fixedly connected to a threaded column (13).

4. A grouting device for bored piles according to claim 3, characterized in that: The inner wall of the bottom column (7) is provided with a circular array of sliding grooves (17), the outer wall of the fixing plate (16) is slidably connected to the inside of the sliding grooves (17), and the outer wall of the threaded column (13) is threadedly connected to the inside of the fixing plate (16).

5. A grouting device for bored piles according to claim 4, characterized in that: A pressure hammer (18) is fixedly connected to the bottom of the fixed plate (16), and the outer wall of the pressure hammer (18) is slidably connected to the inside of the bottom column (7). A limiting block (20) is fixedly connected to the bottom of the threaded column (13), and a second slide groove (21) is provided inside the pressure hammer (18), and the outer wall of the limiting block (20) is slidably connected to the inside of the second slide groove (21).

6. A grouting device for bored piles according to claim 3, characterized in that: The pile body (1) is provided with a first grouting groove (3) in an annular array, the outer wall of the bottom column (7) is provided with a second grouting groove (14) in an annular array, and the fixing plate (16) is fixedly connected with a connecting pipe (15) in an annular array.

7. A grouting device for bored piles according to claim 6, characterized in that: One end of the connecting pipe (15) is fixedly connected to the second grouting groove (14), and a nozzle (19) is fixedly connected to the bottom end of the connecting pipe (15).

8. A grouting device for bored piles according to claim 7, characterized in that: The outer wall of the nozzle (19) is fixedly connected to the inner wall of the pressure hammer (18), and the interior of the fixing plate (16) is fixedly connected to the barrier net (10) of the annular array.

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