Soft soil foundation reinforcing and improving device

Abstract

The invention belongs to the field of buildings, and particularly relates to a soft soil foundation reinforcing and improving device which comprises a supporting plate, a stirring shaft and a plurality of blades, the stirring shaft is of a hollow structure and is rotationally connected with the supporting plate, the blades are arranged on the outer wall of the stirring shaft in the axial direction of the stirring shaft, and a plurality of grouting holes are formed in the side wall of the stirring shaft in the axial direction. A reciprocating assembly, two reciprocating plates and a plurality of grouting pipes are arranged in the stirring shaft, the two reciprocating plates are arranged on the two opposite sides in the stirring shaft correspondingly, one part of the grouting pipes are perpendicularly and fixedly connected to one reciprocating plate, and the other part of the grouting pipes are perpendicularly and fixedly connected to the other reciprocating plate. The multiple grouting pipes extend out of the multiple grouting holes in a one-to-one correspondence mode, and the reciprocating assembly is connected with the two reciprocating plates and used for driving the two reciprocating plates to be close to or away from each other. Cement paste can be evenly poured into a soft soil foundation by controlling stretching and retracting of the grouting pipe, and the pile forming quality is improved.

Description

Technical Field

[0001] The invention belongs to the field of construction, and in particular relates to a soft soil foundation reinforcement and improvement device. Background Art

[0002] Soft soil foundation refers to soil layers mainly composed of soft soil with high content of fine particles such as clay and silt, organic soil with large pores, peat and loose sand, with high groundwater level. The fill and structures on it have poor stability and settlement. Therefore, the stability of the foundation must be ensured before construction. Before the construction of soft soil foundation, the foundation will be reinforced to ensure the safety of the building after the project is completed.

[0003] The deep mixing method is a method of strengthening the foundation by rotating the blades of the mixer to mix the curing agent such as lime or cement with the soft soil. It is suitable for soft soil foundations with high water content. The deep mixing device of the prior art is to drive the mixing shaft to rotate and drill downward into the soil until the mixing head drills down to the designed elevation of the pile bottom, and then lift the mixing shaft upward so that the mixing shaft rises and the cement slurry is sprayed from the bottom through the grouting pipe, that is, rotary grouting, until the mixing head is lifted to the designed elevation of the pile top; the mixing shaft is drilled downward for the second time until the mixing head drills down to the designed elevation of the pile bottom. Since the grouting nozzle is located at the bottom of the mixing head, the actual process of rotary grouting is to first cut and mix the soil with the blades on the top of the grouting nozzle, and then spray cement slurry from the nozzle. However, the cement slurry has poor fluidity in the soil, and the deeper the soil layer, the greater the resistance, which makes the deep cement slurry and soft soil mixed unevenly, resulting in reduced pile quality. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a soft soil foundation reinforcement and improvement device, which can control the expansion and contraction of a grouting pipe so as to evenly pour cement slurry into the soft soil foundation and improve the quality of pile formation.

[0005] The technical solution of the present invention includes a support plate, a stirring shaft and a plurality of blades. The stirring shaft is a hollow structure and is rotatably connected to the support plate. The plurality of blades are axially arranged on the outer wall of the stirring shaft, and a plurality of grouting holes are arranged on the side wall of the stirring shaft along the axial direction. A reciprocating assembly, two reciprocating plates and a plurality of grouting pipes are arranged inside the stirring shaft. The two reciprocating plates are respectively arranged on opposite sides of the stirring shaft. A part of the grouting pipe is vertically fixedly connected to one reciprocating plate, and the other part of the grouting pipe is vertically fixedly connected to the other reciprocating plate, and a plurality of grouting pipes extend out of the plurality of grouting holes in a one-to-one correspondence. The reciprocating assembly is respectively connected to the two reciprocating plates to drive the two reciprocating plates to approach or move away from each other. When the two reciprocating plates are close to each other, the two reciprocating plates drive the grouting pipe to retract into the stirring shaft. When the two reciprocating plates are away from each other, the two reciprocating plates drive the grouting pipe to extend out of the stirring shaft, so that the plurality of grouting pipes respectively inject cement slurry into different positions of the soft soil, and the cement slurry and the soft soil are evenly mixed through the plurality of blades.

[0006] Furthermore, the reciprocating assembly includes a first elliptical cylinder and two connecting rods. The first elliptical cylinder is fixedly connected to the support plate. A groove is axially provided on the side wall of the first elliptical cylinder. One end of the two connecting rods is respectively slidably connected to the groove, and the other end of the two connecting rods is respectively connected to the two reciprocating plates.

[0007] Furthermore, the reciprocating assembly includes a second elliptical cylinder and several springs. The second elliptical cylinder is fixedly connected to the support plate, and the side walls of the second elliptical cylinder are respectively in contact with the surfaces of the two reciprocating plates. The several springs are correspondingly sleeved on the grouting pipe, and the several springs are all located between the reciprocating plate and the side walls of the stirring shaft.

[0008] Furthermore, each reciprocating plate is an arc-shaped plate.

[0009] Furthermore, it also includes a main pipeline, which runs through the support plate and is rotatably connected to the support plate. One end of the main pipeline located inside the stirring shaft is connected to a plurality of grouting pipes.

[0010] Furthermore, each grouting pipe includes a flexible pipe and a steel pipe. The steel pipe is fixed on the reciprocating plate, and one end of the steel pipe extends out of the stirring shaft, and the other end is connected to the main pipeline through the flexible pipe.

[0011] Furthermore, a plurality of truncated cone-shaped scrapers are provided on the outer wall of the stirring shaft, and the plurality of scrapers are sleeved on a plurality of grouting pipes in a one-to-one correspondence to prevent the grouting pipes from bringing soft soil into the stirring shaft when the grouting pipes are contracted into the stirring shaft.

[0012] Furthermore, a drainage assembly is provided inside the agitator shaft, and the drainage assembly includes a water pump and a drain pipe. One end of the drain pipe passes through the support plate and extends out of the agitator shaft, and the drain pipe is rotatably connected to the support plate. The other end of the drain pipe is located at the bottom end of the agitator shaft. The water pump and the drain pipe are connected to pump water inside the agitator shaft through the drain pipe.

[0013] Furthermore, at least one grouting pipe is provided below each blade.

[0014] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0015] The present invention arranges a reciprocating plate and a reciprocating assembly inside a stirring shaft with a hollow structure, a grouting pipe is fixed on the two reciprocating plates, and the grouting pipe extends out of the stirring shaft through a grouting hole, and the reciprocating assembly drives the two reciprocating plates to approach or move away from each other, so that the grouting pipe can be expanded and contracted relative to the stirring shaft, thereby being able to pour cement slurry at different positions, and at the same time, under the rotation of the stirring shaft and the stirring of the blades, the cement slurry and soft soil are evenly mixed, thereby improving the quality of pile formation.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The overall structure of the soft soil foundation reinforcement and improvement device of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The overall structure of the soft soil foundation reinforcement and improvement device of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 for Figure 2 A enlarged view

[0021] Figure 4 for Figure 1 Middle B: Enlarged view;

[0022] Figure 5 for Figure 1 Enlarged view of middle C

[0023] Figure 6 This is a schematic diagram of the first elliptical cylinder structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the second elliptical cylinder structure of the present invention;

[0025] Figure 8 This is a diagram showing the coordination of the main pipeline, drainage pipe and support plate of the present invention.

[0026] Reference numerals:

[0027] 1. Agitator shaft; 2. Blades; 3. Support plate; 4. Grouting pipe; 41. Flexible pipe; 42. Steel pipe; 5. Reciprocating plate; 6. First elliptical column; 7. Groove; 8. Connecting rod; 9. Second elliptical column; 10. Spring; 11. Fixed rod; 12. Main pipeline; 13. Scraper; 14. Drain pipe; 15. Casing. DETAILED DESCRIPTION

[0028] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0029] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the embodiments of the present invention, unless otherwise specified, “plurality” means two or more.

[0031] like Figures 1 to 8As shown, the present invention provides a soft soil foundation reinforcement and improvement device, including a support plate 3, a stirring shaft 1 and a plurality of blades 2, the stirring shaft 1 is a hollow structure, and is rotatably connected to the support plate 3, the plurality of blades 2 are axially arranged on the outer wall of the stirring shaft 1, the side wall of the stirring shaft 1 is provided with a plurality of grouting holes along the axial direction, the stirring shaft 1 is provided with a reciprocating assembly, two reciprocating plates 5 and a plurality of grouting pipes 4, the two reciprocating plates 5 are respectively arranged on opposite sides of the stirring shaft 1, a part of the grouting pipe 4 is vertically fixedly connected to a reciprocating plate 5, and the other part The grouting pipe 4 is vertically fixedly connected to another reciprocating plate 5, and several grouting pipes 4 extend out from several grouting holes one by one. The reciprocating components are respectively connected to the two reciprocating plates 5, and are used to drive the two reciprocating plates 5 to approach or move away from each other. When the two reciprocating plates 5 are close to each other, the two reciprocating plates 5 drive the grouting pipe 4 to retract into the stirring shaft 1. When the two reciprocating plates 5 are away from each other, the two reciprocating plates 5 drive the grouting pipe 4 to extend out of the stirring shaft 1, so that the several grouting pipes 4 are respectively injected with cement slurry into different positions of the soft soil, and the cement slurry and the soft soil are evenly mixed through the several blades 2.

[0032] In the present invention, a reciprocating plate 5 and a reciprocating assembly are arranged inside a mixing shaft 1 with a hollow structure. A grouting pipe 4 is fixed on the two reciprocating plates 5, and the grouting pipe 4 extends out of the mixing shaft 1 through a grouting hole. The reciprocating assembly drives the two reciprocating plates 5 to move closer to or away from each other, so that the grouting pipe 4 can be extended and retracted relative to the mixing shaft 1, thereby being able to pour cement slurry at different positions. At the same time, under the stirring of the blades 2, the cement slurry and soft soil are evenly mixed, thereby improving the quality of pile formation.

[0033] Since the grouting pipe 4 and the stirring shaft 1 are relatively telescopic, the grouting pipe 4 rotates together with the stirring shaft 1, so that the two reciprocating plates 5 also need to rotate with the stirring shaft 1. Therefore, the reciprocating assembly is fixed relative to the two reciprocating plates 5, allowing the two reciprocating plates 5 to move away from or closer to each other while rotating around the reciprocating assembly.

[0034] like Figure 1 and Figure 6 As shown, in the embodiment provided by the present invention, the reciprocating assembly includes a first elliptical cylinder 6 and two connecting rods 8. The first elliptical cylinder 6 is fixedly connected to the support plate 3. A groove 7 is axially provided on the side wall of the first elliptical cylinder 6. One ends of the two connecting rods 8 are respectively slidably connected to the groove 7, and the other ends of the two connecting rods 8 are respectively connected to the two reciprocating plates 5.

[0035] Specifically, when the stirring shaft 1 rotates, the two reciprocating plates 5 are driven to rotate through the grouting pipe 4, and the first elliptical cylinder 6 is fixed inside the stirring shaft 1, so that when the reciprocating plate 5 rotates, the two connecting rods 8 are driven to slide in the groove 7 on the side wall of the first elliptical cylinder 6. When the two connecting rods 8 slide to the major axis of the ellipse, the two reciprocating plates 5 are farthest apart. When the two connecting rods 8 slide to the minor axis of the ellipse, the two reciprocating plates 5 are closest to each other, thereby achieving the two reciprocating plates 5 approaching or moving away from each other.

[0036] Optionally, a plurality of grooves 7 and matching connecting rods 8 are provided on the first elliptical cylinder 6 to adapt to reciprocating plates 5 of different lengths, so as to avoid excessive force on a single connecting rod 8 when the reciprocating plate 5 is too long, resulting in the connecting rod 8 breaking during rotation.

[0037] like Figure 2 and Figure 7 As shown, in the embodiment provided by the present invention, the reciprocating assembly includes a second elliptical cylinder 9 and a plurality of springs 10, the second elliptical cylinder 9 is fixedly connected to the support plate 3, and the side walls of the second elliptical cylinder 9 are respectively in contact with the surfaces of the two reciprocating plates 5, the plurality of springs 10 are respectively sleeved on the grouting pipe 4, and the plurality of springs 10 are all located between the reciprocating plate 5 and the side walls of the stirring shaft 1.

[0038] Specifically, when the stirring shaft 1 rotates, the two reciprocating plates 5 are driven to rotate through the grouting pipe 4, and the second elliptical cylinder 9 is fixed inside the stirring shaft 1. Under the action of the spring 10, the two reciprocating plates 5 are in contact with the side wall of the second elliptical cylinder 9. When the two reciprocating plates 5 are in contact with the side wall where the long axis of the second elliptical cylinder 9 is located, the two reciprocating plates 5 are farthest apart from each other. When the two reciprocating plates 5 are in contact with the side wall where the short axis of the second elliptical cylinder 9 is located, the two reciprocating plates 5 are closest to each other. Under the action of the spring 10, the two reciprocating plates 5 are moved closer to or farther away from each other.

[0039] In the embodiment provided by the present invention, each reciprocating plate 5 is an arc-shaped plate.

[0040] It can be understood that the first elliptical cylinder 6 and the second elliptical cylinder 9 are both fixedly connected to the support plate 3 via the fixing rod 11 , so as to reduce the volume of the elliptical cylinder and the weight of the stirring shaft 1 .

[0041] Furthermore, the reciprocating plate 5 is an arc-shaped plate in order to increase the fitting area with the side wall of the second elliptical cylinder 9, so as to avoid the reciprocating plate 5 partially fitting and colliding with the second elliptical cylinder 9 at the same position during rotation, thereby causing damage to the reciprocating plate 5.

[0042] like Figure 1 and Figure 2As shown, in the embodiment provided by the present invention, it also includes a main pipeline 12, which passes through the support plate 3 and is rotatably connected to the support plate 3. One end of the main pipeline 12 located inside the stirring shaft 1 is connected to several grouting pipes 4 respectively.

[0043] Since the grouting pipe 4 rotates with the stirring shaft 1 , in order to prevent the grouting pipe 4 from being entangled in the stirring shaft 1 , a main pipeline 12 rotatably connected to the support plate 3 is provided to avoid this problem.

[0044] In the embodiment provided by the present invention, each grouting pipe 4 includes a flexible pipe 41 and a steel pipe 42, the steel pipe 42 is fixed on the reciprocating plate 5, and one end of the steel pipe 42 extends out of the stirring shaft 1, and the other end is connected to the main pipeline 12 through the flexible pipe 41.

[0045] It can be understood that since the grouting pipe 4 needs to be retracted outside the stirring shaft 1, a rigid pipe is required for the grouting pipe 4 on the outer wall of the stirring shaft 1 to prevent the grouting pipe 4 from grouting at a position far from the stirring shaft 1, and the reciprocating plates 5 inside the stirring shaft 1 are close to or away from each other. At this time, the grouting pipe 4 needs to be flexible inside the stirring shaft 1 to adapt to the movement of the reciprocating plates 5. If a rigid pipe is used, the reciprocating plates 5 cannot move or the grouting pipe 4 inside the stirring shaft 1 will be damaged.

[0046] In the embodiment provided by the present invention, a plurality of truncated cone-shaped scrapers 13 are provided on the outer wall of the stirring shaft 1, and the plurality of scrapers 13 are correspondingly sleeved on a plurality of grouting pipes 4 to prevent the grouting pipes 4 from bringing soft soil into the stirring shaft 1 when the grouting pipes 4 shrink into the stirring shaft 1.

[0047] It is understandable that when the grouting pipe 4 contracts toward the inside of the stirring shaft 1 , soft soil is easily brought into the stirring shaft 1 from the grouting hole. The scraper 13 is provided to clean the soft soil on the grouting pipe 4 to prevent it from being brought into the stirring shaft 1 .

[0048] In the embodiment provided by the present invention, a drainage assembly is provided inside the agitator shaft 1, and the drainage assembly includes a water pump and a drain pipe 14. One end of the drain pipe 14 passes through the support plate 3 and extends out of the agitator shaft 1, and the drain pipe 14 is rotatably connected to the support plate 3. The other end of the drain pipe 14 is located at the bottom end of the agitator shaft 1. The water pump and the drain pipe 14 are connected, and the water inside the agitator shaft 1 is pumped out through the drain pipe 14.

[0049] It is understandable that soft soil contains a large amount of water. Although the scraper 13 can block part of it, another part will flow into the inner wall of the stirring shaft 1 from the gap between the grouting hole and the grouting pipe 4. Therefore, the internal water is cleaned through the drainage pipe 14 and the drainage pump.

[0050] Optionally, since the main pipeline 12 and the drainage pipe 14 are rotatably connected to the support plate 3 at the same time, the main pipeline 12 and the drainage pipe 14 are simultaneously placed in the sleeve 15 and rotatably connected to the support plate 3 through the sleeve 15.

[0051] In the embodiment provided by the present invention, at least one grouting pipe 4 is provided under each blade 2 to ensure that the cement slurry can be stirred when the blade 2 rotates.

[0052] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0053] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A soft soil foundation reinforcement and improvement device, characterized in that: The invention comprises a support plate (3), a stirring shaft (1) and a plurality of blades (2); the stirring shaft (1) is a hollow structure and is rotatably connected to the support plate (3); the plurality of blades (2) are arranged on the outer wall of the stirring shaft (1) along the axial direction of the stirring shaft (1); and a plurality of grouting holes are arranged on the side wall of the stirring shaft (1) along the axial direction; The stirring shaft (1) is provided with a reciprocating assembly, two reciprocating plates (5) and a plurality of grouting pipes (4) inside. The two reciprocating plates (5) are respectively arranged on two opposite sides inside the stirring shaft (1). A portion of the grouting pipes (4) is vertically fixedly connected to one of the reciprocating plates (5), and another portion of the grouting pipes (4) is vertically fixedly connected to the other of the reciprocating plates (5). The plurality of grouting pipes (4) extend out from the plurality of grouting holes in a one-to-one correspondence. The reciprocating assembly is respectively connected to the two reciprocating plates (5). 5) connected, and used to drive the two reciprocating plates (5) to move closer to or farther away from each other. When the two reciprocating plates (5) move closer to each other, the two reciprocating plates (5) drive the grouting pipe (4) to retract into the stirring shaft (1); when the two reciprocating plates (5) move away from each other, the two reciprocating plates (5) drive the grouting pipe (4) to extend out of the stirring shaft (1), so that the plurality of grouting pipes (4) respectively inject cement slurry into different positions of the soft soil, and the cement slurry and the soft soil are evenly mixed through the plurality of blades (2).

2. A soft soil foundation reinforcement and improvement device as claimed in claim 1, characterized in that: The reciprocating assembly comprises a first elliptical cylinder (6) and two connecting rods (8), wherein the first elliptical cylinder (6) is fixedly connected to the support plate (3), a groove (7) is axially provided on the side wall of the first elliptical cylinder (6), one end of the two connecting rods (8) are respectively slidably connected to the grooves (7), and the other ends of the two connecting rods (8) are respectively connected to the two reciprocating plates (5).

3. A soft soil foundation reinforcement and improvement device as claimed in claim 1, characterized in that: The reciprocating assembly comprises a second elliptical cylinder (9) and a plurality of springs (10), wherein the second elliptical cylinder (9) is fixedly connected to the support plate (3), and the side walls of the second elliptical cylinder (9) are respectively in contact with the surfaces of the two reciprocating plates (5), and the plurality of springs (10) are sleeved on the grouting pipe (4) in a one-to-one correspondence, and the plurality of springs (10) are all located between the reciprocating plate (5) and the side wall of the stirring shaft (1).

4. A soft soil foundation reinforcement and improvement device as claimed in claim 3, characterized in that: Each of the reciprocating plates (5) is an arc-shaped plate.

5. The soft soil foundation reinforcement and improvement device according to claim 1, characterized in that: It also comprises a main pipeline (12), wherein the main pipeline (12) passes through the support plate (3), and the main pipeline (12) is rotatably connected to the support plate (3); One end of the main pipeline (12) located inside the stirring shaft (1) is connected to a plurality of grouting pipes (4).

6. A soft soil foundation reinforcement and improvement device as claimed in claim 5, characterized in that: Each of the grouting pipes (4) comprises a flexible pipe (41) and a steel pipe (42), wherein the steel pipe (42) is vertically fixed on the corresponding reciprocating plate (5), and one end of the steel pipe (42) extends out of the stirring shaft (1), and the other end is connected to the main pipeline (12) through the flexible pipe (41).

7. The soft soil foundation reinforcement and improvement device according to claim 1, characterized in that: A plurality of truncated cone-shaped scrapers (13) are provided on the outer wall of the stirring shaft (1), and the plurality of scrapers (13) are sleeved on the plurality of grouting pipes (4) in a one-to-one correspondence, so as to prevent the grouting pipes (4) from bringing soft soil into the interior of the stirring shaft (1) when the grouting pipes (4) are contracted into the stirring shaft (1).

8. The soft soil foundation reinforcement and improvement device according to claim 1, characterized in that: A drainage component is provided inside the stirring shaft (1), and the drainage component comprises a water pump and a drainage pipe (14). One end of the drainage pipe (14) passes through the support plate (3) and extends out of the stirring shaft (1), and the drainage pipe (14) is rotatably connected to the support plate (3). The other end of the drainage pipe (14) is located at the bottom end inside the stirring shaft (1). The water pump is connected to the drainage pipe (14), and water inside the stirring shaft (1) is pumped out through the drainage pipe (14).

9. The soft soil foundation reinforcement and improvement device according to claim 1, characterized in that: At least one grouting pipe (4) is provided below each blade (2).

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