A new pipe jacking tunnel construction grouting device

Abstract

The application provides a new type of pipe jacking tunnel construction grouting device, which comprises a shell protection mechanism, a movable out-grouting mechanism, a driving mechanism and a grouting mechanism, the movable out-grouting mechanism is movably connected in the shell protection mechanism, the driving mechanism is connected in the shell protection mechanism, the grouting mechanism and the driving mechanism are connected with the movable out-grouting mechanism respectively, and a detection device is connected to the movable out-grouting mechanism. The soil around the tunnel is detected in real time by the ultrasonic detection device to determine the grouting rate, the slurry diffusion is detected by the ultrasonic device, the telescopic grouting pipeline and the rotatable middle fixed plate are matched to realize the uniform distribution of the slurry and prevent the occurrence of cavities; the outer ring protection shell is used for protecting the internal components, avoiding the entry of soil and stone, and avoiding the excessive deformation of the surrounding soil and stone.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking technology, and more specifically to a novel grouting device for pipe jacking tunnel construction. Background Technology

[0002] With the continuous development of urban infrastructure construction, underground engineering construction is gradually entering its peak, with an increasing number of projects and a growing scarcity of available underground space resources, making project implementation increasingly difficult. As the government and society place increasing emphasis on urban civilization construction and environmental protection, the demand for rapid and civilized construction is growing stronger, leading to more and stricter requirements for underground engineering construction. Construction in busy urban centers or areas with high traffic volume and numerous pipelines must minimize the impact on surface traffic, the surrounding environment, and residents' lives. Pipe jacking tunnel construction, as a trenchless construction method, has thus continuously developed. However, pipe jacking tunnel construction still has some shortcomings at this stage, especially in grouting, where the disadvantages are particularly obvious.

[0003] The diameter of the pipe jacking machine is generally 2-5 cm larger than the pipe diameter. Due to this difference in pipe diameter, the gap between the pipe and the surrounding soil is filled by grout injected through the injection holes. Thixotropic grout is a mixture that, under pressure, comes into contact with the soil and seeps into the soil layer, slowly spreading and forming a whole with the surrounding soil. As the amount of seepage increases, the soil and grout will form a dense permeable block. At the same time, under the pressure of the grout, the blocks are tightly bonded together, thus forming a stable grout jacket around the pipe, composed of grout and soil.

[0004] The slurry has two main functions: First, it lubricates and reduces drag. The thixotropic slurry is fluid during transportation and injection, and is a gel-like liquid. It changes the dry friction between the outer wall of the pipeline and the soil layer into wet friction, thus reducing friction. Second, it supports the soil. After a certain period of settling, the slurry solidifies into a gel-like state, which can support the soil, balance the soil pressure, stabilize the soil around the pipeline, and prevent ground subsidence.

[0005] The shortcomings of current technology:

[0006] 1. The grouting volume needs to be determined based on the jacking speed and surrounding conditions. Existing grouting devices cannot effectively monitor changes in the surrounding environment and soil conditions to adjust the grouting rate. Soil conditions depend on the results of previous surveys.

[0007] 2. Because grouting is not visible, it is impossible to know whether grouting is complete or the distribution of the grout.

[0008] 3. Existing grouting technology is less effective when encountering cavities around the tunnel, which may lead to increased pipe jacking thrust and significant deformation in the later stages. Summary of the Invention

[0009] To address the aforementioned technical problems, this invention aims to provide a novel grouting device for pipe jacking tunnel construction. To solve these problems, this invention employs the following technical solution:

[0010] A novel grouting device for pipe jacking tunnel construction includes an outer shell protection mechanism, a movable grout outlet mechanism, a drive mechanism, and a grout inlet mechanism.

[0011] The movable pulp discharge mechanism is movably connected inside the outer casing protection mechanism, the drive mechanism is connected inside the outer casing protection mechanism, the pulp inlet mechanism and the drive mechanism are respectively connected to the movable pulp discharge mechanism, and a detection device is connected to the movable pulp discharge mechanism.

[0012] Advantageously, the outer shell protection mechanism includes a front contact surface, a rear contact surface, and an outer protective shell, with both the front contact surface and the rear contact surface fixed to the inner wall of the outer protective shell.

[0013] Advantageously, the movable grouting mechanism includes a central fixed plate and two or more fixed grouting pipes, and the detection device and all the fixed grouting pipes are fixedly connected to the central fixed plate.

[0014] Advantageously, both ends of the fixed grouting pipe are connected to retractable grouting pipes, and the grout outlet on the retractable grouting pipe is connected to the outside of the outer protective shell.

[0015] Advantageously, the grouting mechanism includes a grouting pipe fixed to the central fixed plate. A grout storage chamber is provided inside the grouting pipe. The grout storage chamber is connected to all the fixed grouting pipes. A hydraulic pump and a first motor are provided inside the grout storage chamber. The first motor is connected to the hydraulic pump and to all the retractable grouting pipes.

[0016] Advantageously, the feature is that jacks are fixedly connected to the two side walls of the central fixing plate, and rails are provided on both the front contact surface and the rear contact surface. A second motor is connected to the jack on one side wall of the central fixing plate, and the second motor is slidably connected to the rail on the rear contact surface. The jack on the other side wall of the central fixing plate is slidably connected to the rail on the front contact surface.

[0017] Advantageously, the detection device is an ultrasonic detection device.

[0018] Advantageously, a conduit is fixedly connected to the middle fixing plate, and a cavity is opened inside the conduit, with the slurry conveying pipe located inside the cavity.

[0019] Advantageously, a processing module is provided on the central fixed plate, and the driving mechanism and the detection device are electrically connected to the processing module respectively.

[0020] The present invention has the following beneficial effects:

[0021] This invention enables real-time detection of the soil around the tunnel using an ultrasonic detection device to determine the grouting rate. The ultrasonic device also detects grout diffusion, and in conjunction with a telescopic grouting pipe and a rotatable central fixing plate, ensures uniform grout distribution and prevents voids. An outer protective shell protects internal components from soil and rock ingress, while also preventing excessive deformation of the surrounding soil and rock. Jacks are installed to maintain forward thrust when the central fixing plate rotates. The cavity facilitates wiring and data transmission. Attached Figure Description

[0022] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of a novel grouting device for pipe jacking tunnel construction according to the present invention;

[0024] Figure 2 This is a right view of a novel grouting device for pipe jacking tunnel construction according to the present invention;

[0025] Figure 3 This is a front view of a novel grouting device for pipe jacking tunnel construction according to the present invention;

[0026] Figure 4 This is a perspective view of the front contact surface, rear contact surface, and middle fixing plate of a novel grouting device for pipe jacking tunnel construction according to the present invention.

[0027] Reference numerals: 1. Fixed grouting pipe; 2. Detection device; 3. Grout outlet; 4. Jack; 41. Second motor; 5. Track; 6. Front contact surface; 7. Rear contact surface; 8. Grout storage chamber; 9. Cavity; 10. Middle fixing plate; 11. Outer protective shell; 12. First motor; 13. Telescopic grouting pipe; 14. Conduit pipe; 15. Grout delivery pipe. Detailed Implementation

[0028] 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.

[0029] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] like Figures 1-4 As shown, a novel grouting device for pipe jacking tunnel construction includes an outer shell protection mechanism, a movable grout outlet mechanism, a drive mechanism, and a grout inlet mechanism.

[0032] The movable pulp discharge mechanism is movably connected inside the outer casing protection mechanism, the drive mechanism is connected inside the outer casing protection mechanism, the pulp inlet mechanism and the drive mechanism are respectively connected to the movable pulp discharge mechanism, and a detection device 2 is connected to the movable pulp discharge mechanism.

[0033] According to an optional embodiment of the present invention, the outer shell protection mechanism includes a front contact surface 6, a rear contact surface 7, and an outer ring protective shell 11, wherein the front contact surface 6 and the rear contact surface 7 are both fixed to the inner wall of the outer ring protective shell 11.

[0034] According to an optional embodiment of the present invention, the movable grouting mechanism includes a central fixing plate 10 and two or more fixed grouting pipes 1, and the detection device 2 and all the fixed grouting pipes 1 are fixedly connected to the central fixing plate 10.

[0035] According to an optional embodiment of the present invention, both ends of the fixed grouting pipe 1 are connected to a telescopic grouting pipe 13, and the grout outlet 3 on the telescopic grouting pipe 13 is connected to the outside of the outer protective shell 11.

[0036] According to an optional embodiment of the present invention, the grouting mechanism includes a grouting pipe 15, which is fixedly connected to the central fixed plate 10. A grout storage chamber 8 is provided inside the grouting pipe 15, and the grout storage chamber 8 is connected to all the fixed grouting pipes 1. A hydraulic pump and a first motor 12 are provided inside the grout storage chamber 8. The first motor 12 is connected to the hydraulic pump, and a second motor 41 is connected to all the retractable grouting pipes 13.

[0037] In an optional embodiment of the present invention, the driving mechanism is a first motor 12, the middle fixing plate 10 is fixed to the output end of the first motor 12, and the first motor 12 is connected to the rear contact surface 7.

[0038] According to an optional embodiment of the present invention, jacks 4 are fixedly connected to the two side walls of the central fixing plate 10, and rails 5 are provided on both the front contact surface 6 and the rear contact surface 7. A second motor 41 is connected to the jack 4 on one side wall of the central fixing plate 10, and the second motor 41 is slidably connected to the rail 5 on the rear contact surface 7. The jack 4 on the other side wall of the central fixing plate 10 is slidably connected to the rail 5 on the front contact surface 6.

[0039] In an optional embodiment of the present invention, the detection device 2 is an ultrasonic detection device.

[0040] According to an optional embodiment of the present invention, a conduit 14 is fixedly connected to the central fixing plate 10, and a cavity 9 is provided inside the conduit 14, and the slurry conveying pipe 15 is located inside the cavity 9.

[0041] According to an optional embodiment of the present invention, a processing module is provided on the central fixing plate 10, and the driving mechanism and the detection device 2 are electrically connected to the processing module respectively.

[0042] Implementation process: The front contact surface 6 is used to connect with the front cutter head or jacking pipe, and the rear contact surface 7 is used to connect with the rear jacking pipe. That is, this device is installed behind the cutter head or between the jacking pipes.

[0043] The grout transported from the rear enters the grout storage chamber 8 for storage. As the cutterhead advances forward, the grout in the grout storage chamber 8 enters the fixed grouting pipe 1 and the retractable grouting pipe 13, continuously transporting it to the grout outlet 3 and injecting it onto the outside of the jacking pipe to form a protective sleeve. At the same time, the ultrasonic detection device works continuously, continuously emitting ultrasonic waves to detect the surrounding soil conditions. After receiving the soil conditions, the processing module controls the pumping pressure of the hydraulic pump in the grout storage chamber 8 to adjust the grouting rate. When the ultrasonic detection device detects voids or uneven grouting near the jacking pipe, the processing module controls the output of the first motor 12 and the output of the second motor 41 to rotate, thereby driving the central fixed plate 10 to rotate and align the grout outlet 3 of the retractable grouting pipe 13 with the area that needs repair. At the same time, the forward jacking is paused, and the second motor 41 extends the retractable grouting pipe 13 to the area that needs repair. After the repair is completed, the forward jacking continues.

[0044] The jack 4 on one side wall of the middle fixed plate 10 is slidably connected to the track 5 on the rear contact surface 7, and the jack 4 on the other side wall of the middle fixed plate 10 is slidably connected to the track 5 on the front contact surface 6, so that the middle fixed plate 10 maintains the forward thrust when rotating.

[0045] Cavity 9 is used for wiring or data transmission.

[0046] The outer protective shell 11 is used to protect the internal components, prevent soil and rocks from entering, and prevent excessive deformation of the surrounding soil and rocks.

[0047] The fixed grouting pipe 1 can be set to 4, and in this case, the telescopic grouting pipe 13 and the grout outlet 3 are 8.

[0048] The present invention can detect the soil around the tunnel in real time through the ultrasonic detection device 2 to determine the grouting rate. The ultrasonic device 2 can detect the grout diffusion. With the help of the telescopic grouting pipe 13 and the rotatable central fixing plate 10, the grout can be evenly distributed and the occurrence of voids can be prevented.

[0049] The components, modules, mechanisms, and devices in this invention that are not described in detail are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A novel grouting device for pipe jacking tunnel construction, characterized in that, Includes a housing protection mechanism, a movable pulp discharge mechanism, a drive mechanism, and a pulp inlet mechanism. The movable pulp discharge mechanism is movably connected inside the outer shell protection mechanism, the drive mechanism is connected inside the outer shell protection mechanism, the pulp inlet mechanism and the drive mechanism are respectively connected to the movable pulp discharge mechanism, and a detection device (2) is connected to the movable pulp discharge mechanism. The outer shell protection mechanism includes a front contact surface (6), a rear contact surface (7), and an outer ring protective shell (11). The front contact surface (6) and the rear contact surface (7) are both fixed to the inner wall of the outer ring protective shell (11). The active grouting mechanism includes a central fixed plate (10) and two or more fixed grouting pipes (1), and the detection device (2) and all the fixed grouting pipes (1) are fixedly connected to the central fixed plate (10); Both ends of the fixed grouting pipe (1) are connected to a telescopic grouting pipe (13), and the grout outlet (3) on the telescopic grouting pipe (13) is connected to the outside of the outer protective shell (11); The driving mechanism is a first motor (12), the middle fixing plate (10) is fixed to the output end of the first motor (12), and the first motor (12) is connected to the rear contact surface (7); The grouting mechanism includes a grouting pipe (15), which is fixed to the central fixed plate (10). A grout storage chamber (8) is provided inside the grouting pipe (15). The grout storage chamber (8) is connected to all the fixed grouting pipes (1). A hydraulic pump and a first motor (12) are provided inside the grout storage chamber (8). The first motor (12) is connected to the hydraulic pump. Jacks (4) are fixed to the two side walls of the middle fixing plate (10). Tracks (5) are provided on the front contact surface (6) and the rear contact surface (7). A second motor (41) is connected to the jack (4) on one side wall of the middle fixing plate (10). The second motor (41) is slidably connected to the track (5) on the rear contact surface (7). The jack (4) on the other side wall of the middle fixing plate (10) is slidably connected to the track (5) on the front contact surface (6). The second motor (41) is connected to all the retractable grouting pipes (13).

2. The novel grouting device for pipe jacking tunnel construction according to claim 1, characterized in that, The detection device (2) is an ultrasonic detection device.

3. The novel grouting device for pipe jacking tunnel construction according to claim 2, characterized in that, A conduit (14) is fixedly connected to the central fixing plate (10), and a cavity (9) is opened inside the conduit (14). The slurry conveying pipe (15) is located inside the cavity (9).

4. The novel grouting device for pipe jacking tunnel construction according to claim 3, characterized in that, The central fixing plate (10) is provided with a processing module, and the driving mechanism and the detection device (2) are electrically connected to the processing module respectively.

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