A rotary jet grouting cement slurry reinforcement device

Abstract

The application discloses a kind of rotary jet grouting cement slurry reinforcement device.The device includes: pressure grouting pipeline, pressure grouting pipeline is set on the outer wall of the workpiece to be reinforced;Pressure grouting pipeline includes: vertical pressure grouting pipeline and horizontal pressure grouting pipeline;Vertical pressure grouting pipeline is provided with multiple, all vertical pressure grouting pipeline is interval setting around the central axis of the workpiece to be reinforced;Horizontal pressure grouting pipeline is set in the bottom of vertical pressure grouting pipeline;Horizontal pressure grouting pipeline is provided with multiple nozzles, for sequentially injecting cement slurry in vertical pressure grouting pipeline, horizontal pressure grouting pipeline, so that the soil around the workpiece to be reinforced is softened and forms reinforcement body when cement slurry solidifies to reinforce the workpiece to be reinforced;Large rotating machine equipment, large rotating machine equipment is used to rotate the workpiece to be reinforced down pressure.The application, large rotating machine equipment rotates the workpiece to be reinforced down pressure, cement slurry is rotated and injected along the outer wall of the workpiece to be reinforced, and is uniformly distributed.When cement slurry solidifies, reinforcement body is formed to reinforce the workpiece to be reinforced.

Description

Technical Field

[0001] This invention relates to the field of cast-in-place pile technology, and more specifically, to a jet grouting cement slurry reinforcement device. Background Technology

[0002] Steel pipe piles are widely used in marine and near-shore engineering projects such as cross-sea bridges, port terminals, offshore oil platforms, and offshore wind turbines due to their high bearing capacity, flexibility, and fast construction speed. They have become an important foundation form for floating structures. Suction caissons are a new type of foundation for deep-sea platform structures, meeting the needs of deep-sea wind turbine construction. Compared with traditional steel pipe piles, suction caissons offer advantages such as convenient transportation and construction, short construction period, reusability, and low cost, leading to their increasing application in marine engineering.

[0003] Both steel pipe piles and suction caissons often encounter numerous problems during construction and use, primarily including: the squeezing and disturbance during the sinking process reduces the effective stress and lateral resistance fatigue degradation of the soil surrounding the steel pipe piles or suction caissons; and the soil around the steel pipe piles or suction caissons is prone to cementation failure and particle breakage, resulting in the ineffective utilization of lateral friction and end resistance. These problems adversely affect the bearing capacity of the steel pipe piles or suction caissons. Grouting technology can improve these issues, increase the ultimate bearing capacity of the steel pipe piles or suction caissons, and reduce settlement. Therefore, this technology has been widely applied and developed in recent years.

[0004] However, the existing grouting technology involves first sinking the steel pipe piles or suction caissons, and then spraying cement grout around the steel pipe piles or suction caissons through a grouting pipeline. However, the cement grout injected by this method can only be poured along one side of the steel pipe piles or suction caissons and then automatically flows around the steel pipe piles or suction caissons, which can easily cause uneven grouting.

[0005] There is currently no effective solution to the problem of uneven grouting in existing technologies. Summary of the Invention

[0006] This invention provides a rotary jet grouting cement grouting reinforcement device to solve the problem of uneven grouting in the prior art.

[0007] To achieve the above objectives, the present invention provides a rotary jet grouting cement grouting reinforcement device, which includes: a grouting pipe disposed on the outer wall of the workpiece to be reinforced; the grouting pipe includes: a vertical grouting pipe and a horizontal grouting pipe; multiple vertical grouting pipes are provided, all of which are spaced apart around the central axis of the workpiece to be reinforced; a horizontal grouting pipe is disposed at the bottom of the vertical grouting pipe; multiple nozzles are provided on the horizontal grouting pipe for sequentially spraying cement grout from the vertical grouting pipe and the horizontal grouting pipe to soften the soil around the workpiece to be reinforced and form a solidified body to reinforce the workpiece when the cement grout solidifies; and a large rotating machine for rotating and pressing the workpiece to be reinforced.

[0008] Optionally, the vertical grouting pipe is a straight structure, and the horizontal grouting pipe is a ring structure; the length of the vertical grouting pipe is equal to the length of the workpiece to be reinforced; the inner diameter of the horizontal grouting pipe is fitted to the outer diameter of the workpiece to be reinforced.

[0009] Optionally, all the nozzles are arranged at equal intervals around the center of the annular structure; all the vertical grouting pipes are arranged at equal intervals around the central axis of the workpiece to be reinforced.

[0010] Optionally, the cement slurry sprayed by each nozzle forms a fan-shaped area; the two adjacent endpoints of the arc edges of the fan-shaped areas sprayed by two adjacent nozzles coincide.

[0011] Optionally, the horizontal grouting pipe is located at the bottom end of the workpiece to be reinforced.

[0012] Optionally, the bottom end of the vertical grouting pipe is offset from the nozzle in the horizontal plane.

[0013] Optionally, it also includes: a cement slurry mixing tank; the cement slurry mixing tank is connected to the top of the vertical grouting pipe and is used to inject cement slurry into the vertical grouting pipe.

[0014] Optionally, it also includes: an air compressor; the air compressor is connected to the cement slurry mixing tank and is used to provide pressure to the cement slurry mixing tank so that the cement slurry in the cement slurry mixing tank is poured into the vertical grouting pipe.

[0015] Optionally, the vertical grouting pipe is an integral structure; the horizontal grouting pipe is an integral structure.

[0016] Optionally, the grouting pipe is made of metal.

[0017] The beneficial effects of this invention are:

[0018] This invention provides a rotary jet grouting cement grout reinforcement device, comprising: a grouting pipe disposed on the outer wall of the workpiece to be reinforced; the grouting pipe comprising: a vertical grouting pipe and a horizontal grouting pipe; multiple vertical grouting pipes disposed at intervals around the central axis of the workpiece to be reinforced; a horizontal grouting pipe disposed at the bottom of the vertical grouting pipe; multiple nozzles disposed on the horizontal grouting pipe for sequentially spraying cement grout from the vertical and horizontal grouting pipes to soften the soft clay surrounding the workpiece to be reinforced and form a solidified body to reinforce the workpiece when the cement grout solidifies; and a large rotating machine for rotating and pressing the workpiece to be reinforced.

[0019] Through the above structural design, the large rotating machine will rotate and press down the workpiece to be reinforced. The grouting pipe on the outer wall of the workpiece to be reinforced will also rotate. Then, multiple nozzles set on the horizontal grouting pipe will rotate and spray cement grout. The cement grout will be evenly distributed along the outer wall of the workpiece to be reinforced. When the cement grout solidifies, it will form a reinforced body to reinforce the workpiece.

[0020] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 for Figure 1 This is a schematic diagram of the structure of a rotary jet grouting cement slurry reinforcement device provided in an embodiment of the present invention.

[0023] Symbol explanation:

[0024] Workpiece to be reinforced - 1, vertical grouting pipe - 2, horizontal grouting pipe - 3, nozzle - 4, reinforcement body - 5, fan-shaped area - 6. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The existing grouting technology involves first sinking the steel pipe piles or suction caissons, and then spraying cement grout around the steel pipe piles or suction caissons through a grouting pipeline. However, the cement grout injected by this method can only be poured along one side of the steel pipe piles or suction caissons and then automatically flows around the steel pipe piles or suction caissons, which easily causes uneven grouting.

[0027] Therefore, the present invention provides a rotary jet grouting cement slurry reinforcement device, which can rotate and spray cement slurry to make the grouting uniform; Figure 1 This is a schematic diagram of the structure of a rotary jet grouting cement slurry reinforcement device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the device includes:

[0028] A grouting pipe is provided on the outer wall of the workpiece 1 to be reinforced (in this invention, a steel pipe pile or a suction caisson). The grouting pipe includes: a vertical grouting pipe 2 and a horizontal grouting pipe 3. Multiple vertical grouting pipes 2 are provided, all of which are spaced apart around the central axis of the workpiece 1 to be reinforced; preferably, all of the vertical grouting pipes 2 are equally spaced around the central axis of the workpiece 1 to be reinforced. The vertical grouting pipe 2 has a straight structure; the vertical grouting pipe 2 has an integral structure; the length of the vertical grouting pipe 2 is equal to the length of the workpiece 1 to be reinforced. In this invention, two vertical grouting pipes 2 are provided, located on both sides of the workpiece 1 to be reinforced, and the outer surface of the vertical grouting pipe 2 is fixedly connected to and adheres to the outer wall of the workpiece 1 to be reinforced.

[0029] The horizontal grouting pipe 3 is located at the bottom of the vertical grouting pipe 2; the horizontal grouting pipe 3 is located at the bottom end of the workpiece 1 to be reinforced. The horizontal grouting pipe 3 has a ring structure and is an integral structure; the inner diameter of the horizontal grouting pipe 3 is attached to and fixedly connected to the outer diameter of the workpiece 1 to be reinforced; multiple nozzles 4 are provided on the horizontal grouting pipe 3 for sequentially spraying cement grout from the vertical grouting pipe 2 and the horizontal grouting pipe 3, so as to soften the soil around the workpiece 1 to be reinforced and form a solidified body 5 to reinforce the workpiece 1 to be reinforced when the cement grout solidifies;

[0030] In this invention, the cement slurry is preferably concrete, which is obtained by mixing cementitious materials and mineral aggregates with sufficient water, and has the characteristics of high compressive strength and good durability.

[0031] Specifically, all the nozzles 4 are equally spaced around the center of the annular structure; the cement slurry sprayed by each nozzle 4 forms a fan-shaped area 6; the two adjacent endpoints of the arc edges of the fan-shaped areas 6 sprayed by two adjacent nozzles coincide. In this way, the arc edges of the fan-shaped areas 6 sprayed by all the nozzles 4 form a ring.

[0032] In this invention, six nozzles 4 are provided, and these six nozzles 4 are equally spaced around the center of the annular structure. These six nozzles 4 are located on the side of the horizontal grouting pipe 3; the bottom end of the vertical grouting pipe 2 is located at the top of the horizontal grouting pipe 3. In this invention, the bottom end of one vertical grouting pipe 2 and one nozzle 4 are located on the same left side of the horizontal grouting pipe 3, but the vertical grouting pipe 2 is at the top of the horizontal grouting pipe 3, and the nozzle 4 is on the side of the horizontal grouting pipe 3; the bottom end of another vertical grouting pipe 2 and one nozzle 4 are located on the same right side of the horizontal grouting pipe 3, but the vertical grouting pipe 2 is at the top of the horizontal grouting pipe 3, and the nozzle 4 is on the side of the horizontal grouting pipe 3; wherein, the line connecting the same left and right positions is the diameter of the annulus.

[0033] Furthermore, to ensure the service life of the horizontal grouting pipe 3 and prevent damage from multiple holes in the same location, preferably, the bottom end of the vertical grouting pipe 2 is offset from the nozzle 4 on the horizontal plane. That is, the bottom end of the vertical grouting pipe 2 is at a certain horizontal distance from the nozzle 4.

[0034] In another specific embodiment of the present invention, six vertical grouting pipes 2 and six nozzles 4 are provided; all the vertical grouting pipes 2 are arranged at equal intervals around the central axis of the workpiece 1 to be reinforced; all the nozzles 4 are arranged at equal intervals around the center of the horizontal grouting pipe 3. The bottom ends of the six vertical grouting pipes 2 and the six nozzles 4 are staggered from each other on the horizontal plane of the horizontal grouting pipe 3.

[0035] It should be noted that the present invention does not limit the number of the vertical grouting pipes 2 and the horizontal grouting pipes 3.

[0036] The rotary jet grouting cement grouting reinforcement device also includes: a large rotating machine, which is used to rotate and press the workpiece 1 to be reinforced downwards. That is, the large rotating machine rotates and presses the workpiece 1 to be reinforced into the soil. At this time, cracks appear in the soil around the workpiece 1, and the workpiece 1 becomes unstable. The grouting pipe set on the outer wall of the workpiece 1 rotates and presses downwards along with the workpiece 1. Multiple nozzles 4 set on the horizontal grouting pipe 3 rotate and spray cement grout. The cement grout softens (cuts) the soil around the workpiece 1. When the cement grout solidifies, it forms a reinforcement body 5 to reinforce the workpiece 1.

[0037] In an optional embodiment, the rotary jet grouting cement slurry reinforcement device further includes: a cement slurry mixing tank; the cement slurry mixing tank is connected to the top end of the vertical grouting pipe 2 and is used to inject cement slurry into the vertical grouting pipe 2.

[0038] In an optional embodiment, the rotary jet grouting cement slurry reinforcement device further includes an air compressor; the air compressor is connected to the cement slurry mixing tank and is used to provide pressure to the cement slurry mixing tank so that the cement slurry in the cement slurry mixing tank is injected into the vertical grouting pipe 2.

[0039] In one optional embodiment, the grouting pipe can be made of metal (steel pipe) or rigid polymer material, which can ensure the structural strength of the grouting pipe and the stability of the overall structure.

[0040] The beneficial effects of this invention are:

[0041] This invention provides a rotary jet grouting cement grouting reinforcement device, which includes: a grouting pipe disposed on the outer wall of the workpiece 1 to be reinforced; the grouting pipe includes: a vertical grouting pipe 2 and a horizontal grouting pipe 3; multiple vertical grouting pipes 2 are provided, all of which are spaced apart around the central axis of the workpiece 1 to be reinforced; the horizontal grouting pipe 3 is disposed at the bottom of the vertical grouting pipe 2; multiple nozzles 4 are provided on the horizontal grouting pipe 3 for sequentially spraying cement grout from the vertical grouting pipe 2 and the horizontal grouting pipe 3, so as to soften the soft clay around the workpiece 1 to be reinforced and form a reinforcement body 5 to reinforce the workpiece 1 to be reinforced when the cement grout solidifies; and a large rotating machine for rotating and pressing the workpiece 1 to be reinforced.

[0042] Through the above structural design, the large rotating machine will rotate and press down the workpiece 1 to be reinforced. The grouting pipe on the outer wall of the workpiece 1 to be reinforced will also rotate. Then, the multiple nozzles 4 set on the horizontal grouting pipe 3 will also rotate and spray cement slurry. The cement slurry is evenly distributed along the outer wall of the workpiece 1 to be reinforced. When the cement slurry solidifies, it forms a reinforcement body 5 to reinforce the workpiece 1 to be reinforced.

[0043] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A jet grouting cement slurry reinforcement device, characterized by, Comprise: A grouting pipe is arranged on the outer wall of the workpiece to be reinforced; the grouting pipe comprises vertical grouting pipes and a horizontal grouting pipe; the vertical grouting pipes are arranged in multiple, and all the vertical grouting pipes are arranged at intervals around the central axis of the workpiece to be reinforced; the horizontal grouting pipe is arranged at the bottom of the vertical grouting pipes; a plurality of nozzles are arranged on the horizontal grouting pipe for sequentially spraying the cement slurry in the vertical grouting pipes and the horizontal grouting pipe, so that the soil around the workpiece to be reinforced is softened and a reinforced body is formed when the cement slurry is solidified to reinforce the workpiece to be reinforced; A large-scale rotating machine is arranged for rotating and pressing the workpiece to be reinforced; the grouting pipes on the outer wall of the workpiece to be reinforced also rotate; and the plurality of nozzles arranged on the horizontal grouting pipe also rotate to spray the cement slurry, so that the cement slurry is uniformly distributed along the outer wall of the workpiece to be reinforced; Each nozzle sprays the cement slurry to form a fan-shaped area; and the adjacent two end points of the arc edges of the fan-shaped areas sprayed by the adjacent two nozzles coincide.

2. The device according to claim 1, wherein: the vertical grouting pipes are in a linear structure, and the horizontal grouting pipe is in a ring structure; the length of the vertical grouting pipes is equal to the length of the workpiece to be reinforced; the inner diameter of the horizontal grouting pipe is in close contact with the outer diameter of the workpiece to be reinforced.

3. The device according to claim 2, wherein: all the nozzles are arranged at intervals around the center of the ring structure; all the vertical grouting pipes are arranged at intervals around the central axis of the workpiece to be reinforced.

4. The device according to claim 1, wherein: the horizontal grouting pipe is located at the bottom end of the workpiece to be reinforced.

5. The device according to claim 1, wherein: the bottom end of the vertical grouting pipe is staggered with the nozzles in the horizontal plane.

6. The apparatus of claim 1, wherein, Further comprise: a cement slurry mixing barrel; the cement slurry mixing barrel is connected to the top end of the vertical grouting pipe for pouring the cement slurry into the vertical grouting pipe.

7. The apparatus of claim 1, wherein, Further comprise: an air compressor; the air compressor is connected to the cement slurry mixing barrel for providing pressure to the cement slurry mixing barrel, so that the cement slurry in the cement slurry mixing barrel is poured into the vertical grouting pipe.

8. The device according to claim 1, wherein: the vertical grouting pipes are in an integral structure; and the horizontal grouting pipe is in an integral structure.

9. The device according to claim 1, wherein: the grouting pipe is made of metal.

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