Device for realizing synchronous double-slurry injection of shield

Abstract

The utility model discloses a device for realizing synchronous double-slurry injection of a shield, which relates to the technical field of shield construction and comprises a filling pipeline and an additive pipeline arranged in the filling pipeline, and the additive pipeline extends out of the filling pipeline and is slightly longer than the filling pipeline. Synchronous double-liquid slurry injection is achieved, the problem that single-liquid slurry cannot be solidified in time, and consequently duct pieces float upwards is solved, the device has the advantages that solidification is rapid, the quality of a formed tunnel is guaranteed, the end of the additive pipeline is slightly longer than that of the filling pipeline, filling materials and additives are mixed after being discharged, and the device has the advantage that the pipeline is not prone to being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of shield construction, in particular to a device for realizing synchronous double-liquid slurry injection of a shield. Background Art

[0002] During the excavation of the earth pressure balance shield, since the excavation diameter of the shield machine is larger than the outer diameter of the segment lining ring, it is necessary to continuously fill the building gaps through synchronous grouting. Traditional earth pressure shield machines mostly use single-liquid slurry for synchronous grouting. The initial setting time of single-liquid slurry is long. If it encounters a stratum with large fissure water, the single-liquid slurry cannot solidify in time and loses the function of fixing the segment. This will cause the segment to float, causing the segment to be misaligned and damaged, seriously affecting the quality of the formed tunnel.

[0003] At present, some technologies have been used to realize the simultaneous injection of dual-liquid slurry. The additive pipeline is connected to the filling pipeline, and the slurries are mixed and injected into the gaps between the pipe segments and the formation. However, during the excavation of the shield machine, various reasons may cause the shield machine to shut down and the simultaneous grouting to be interrupted. If the dual slurry in the pipeline is not handled in time, the pipeline will be blocked, which will be very difficult to clean. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a device for realizing synchronous double-liquid slurry injection of a shield machine, which has the advantages that the pipeline is not easily blocked and the pipeline is simple to clean.

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

[0006] A device for realizing synchronous double-liquid slurry injection of a shield machine comprises a filling pipeline and an additive pipeline arranged in the filling pipeline. The additive pipeline extends from the filling pipeline and is slightly longer than the filling pipeline.

[0007] Furthermore, the protruding end of the additive pipeline is a blind end, and a plurality of additive grouting holes are arranged on the side wall of the protruding portion of the additive pipeline.

[0008] Furthermore, one end of the filling pipeline close to the additive grouting hole is a filling grouting port, and the additive grouting hole is outside the filling grouting port.

[0009] Furthermore, a filling pump is arranged at one end of the filling pipeline away from the filling grouting port, and an additive pump is arranged at one end of the additive pipeline away from the additive grouting hole, and the additive pump is outside the filling pump.

[0010] Further, the additive pump is a high-pressure cleaner.

[0011] Furthermore, it comprises a plugging sleeve covering the outer wall of the extended part of the additive pipeline, and a plurality of plugging sleeve annular holes are arranged on the plugging sleeve.

[0012] Furthermore, one end of the plugging sleeve close to the filling grouting port is fixedly connected to the additive pipeline.

[0013] Furthermore, the blocking sleeve is made of elastic material.

[0014] Furthermore, a ball valve is arranged on the filling pipeline, one end of the ball valve is connected to the additive pipeline, the additive pipeline extends to the inside of the filling pipeline through the ball valve, and the other end of the ball valve is fixedly connected to the additive pipeline.

[0015] Furthermore, a flow meter and a pressure meter are arranged on the additive pipeline.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. By adding an additive pipeline to the synchronous grouting pipeline through a ball valve, the synchronous injection of double liquid slurry is realized, which solves the problem that the single liquid slurry cannot solidify in time, causing the pipe segment to float up. It has the advantages of rapid solidification and ensuring the quality of the formed tunnel.

[0018] 2. By setting the end of the additive pipeline slightly longer than the filling pipeline and setting a plugging sleeve to control the timing of additive injection, the problem of easy pipeline blockage is solved. It has the advantages of accurately controlling the timing of additive discharge and the pipeline is not easy to be blocked.

[0019] 3. By adding flow meters and pressure gauges to the additive pipeline, the pressure and flow of the double-liquid grouting are controlled, which solves the problem of the pipe segment floating up and has the advantage of quickly fixing the pipe segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a partially enlarged schematic diagram of the front part of the plugging sleeve of the utility model;

[0022] Figure 3 This is a partial enlarged schematic diagram of the utility model after the plugging sleeve is installed;

[0023] Figure 4 It is a partially enlarged cross-sectional schematic diagram of the utility model after the plugging sleeve is put on.

[0024] In the figure: 1. filling pump; 2. filling pipeline; 3. additive pump; 4. additive pipeline; 41. ball valve; 42. flow meter; 43. pressure gauge; 5. filling grouting port; 6. additive grouting hole; 7. sealing sleeve; 8. sealing sleeve annular hole. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-4 This embodiment provides a device for realizing synchronous dual-liquid slurry injection of a shield, including a filling pipeline 2 and an additive pipeline 4 arranged in the filling pipeline 2, the additive pipeline 4 extends from the filling pipeline 2 and is slightly longer than the filling pipeline 2.

[0027] The filling pipeline 2 and the additive pipeline 4 are independent, and the additive pipeline 4 is slightly longer than the filling pipeline 2, so that the two liquids can be mixed after the slurry is discharged, avoiding pipeline blockage caused by the mixing of the two liquid slurries in the pipeline.

[0028] In this embodiment, the extended end of the additive pipeline 4 is a blind end, and a plurality of additive grouting holes 6 are arranged on the side wall of the extended portion of the additive pipeline 4. The additive grouting holes 6 can be arranged in groups and arranged in an array on the pipe wall.

[0029] In this embodiment, the end of the filling pipeline 2 close to the additive grouting hole 6 is the filling grouting port 5, and the additive grouting hole 6 is outside the filling grouting port 5. While filling and grouting, the additive is discharged from the additive grouting hole 6, and the filling slurry and the additive are mixed after being discharged.

[0030] In this embodiment, a filling pump 1 is arranged at the end of the filling pipeline 2 away from the filling grouting port 5, and an additive pump 3 is arranged at the end of the additive pipeline 4 away from the additive grouting hole 6. The additive pump 3 is outside the filling pump 1. The filling pump 1 and the additive pump 3 are arranged separately and can control the timing of the dual-liquid slurry discharge separately.

[0031] In this embodiment, the additive pump 3 is a high-pressure cleaning machine, which can generate grouting power and can also be used to clean the additive pipeline 4 when the additive is not used.

[0032] In this embodiment, a plugging sleeve 7 is included which covers the outer wall of the protruding portion of the additive pipeline 4. A plurality of plugging sleeve annular holes 8 are arranged on the plugging sleeve 7. When the additive is grouting, the additive applies pressure to the plugging sleeve 7 toward the outside of the pipeline, and the additive is discharged from the plugging sleeve annular holes 8 to complete the double-liquid grouting.

[0033] In this embodiment, one end of the plugging sleeve 7 close to the filling grouting port 5 is fixedly connected to the additive pipeline 4, so that the additive is only discharged from the ring hole 8 of the plugging sleeve 7, and the additive will not flow back into the filling pipeline 2 to cause pipeline blockage.

[0034] In this embodiment, the sealing sleeve 7 is made of elastic material. When the additive pump 3 is started, the additive applies pressure to the sealing sleeve 7 toward the outside of the pipeline, the sealing sleeve 7 is deformed toward the outside of the pipe, and the additive is discharged. When the additive pump 3 is stopped, the sealing sleeve 7 resumes its deformation, and the sealing covers the additive grouting hole 6, so that the additive does not flow out, thereby achieving the effect of preventing the pipeline from being blocked.

[0035] In this embodiment, a ball valve 41 is provided on the filling pipeline 2, one end of the ball valve 41 is connected to the additive pipeline 4, the additive pipeline 4 extends to the interior of the filling pipeline 2 through the ball valve 41, and the other end is fixedly connected to the filling pipeline 2. The ball valve 41 allows the additive pipeline 4 to pass into the interior of the filling pipeline 2 and keeps the filling pipeline 2 and the additive pipeline 4 independent of each other.

[0036] In this embodiment, a flow meter 42 and a pressure gauge 43 are provided on the additive pipeline 4, through which the double-liquid grouting pressure and flow are controlled to ensure rapid fixation of the pipe segment and prevent the pipe segment from floating up.

[0037] When the shield tunneling starts synchronous grouting, first start the filling pump 1 to inject cement slurry, and then start the high-pressure cleaning machine. The additive applies pressure to the plugging sleeve 7 toward the outside of the pipeline, and the plugging sleeve 7 deforms toward the shape of the pipeline. The water glass is discharged from the annular hole 8 of the plugging sleeve, and the cement slurry is mixed with the water glass to form a double liquid slurry. When the grouting is stopped, the high-pressure cleaning machine is stopped first, and the plugging sleeve 7 recovers its deformation to block the annular hole 8 of the plugging sleeve to prevent the water glass from flowing out of the additive pipeline 4, and then the filling pump 1 is stopped to stop the discharge of cement slurry.

[0038] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for realizing synchronous double-liquid slurry injection of a shield machine, characterized in that: The invention comprises a filling pipeline (2) and an additive pipeline (4) arranged in the filling pipeline (2), wherein the additive pipeline (4) extends from the filling pipeline (2) and is slightly longer than the filling pipeline (2); the extended end of the additive pipeline (4) is a blind end, and a plurality of additive grouting holes (6) are arranged on the side wall of the extended portion of the additive pipeline (4); the end of the filling pipeline (2) close to the additive grouting hole (6) is a filling grouting port (5), and the additive grouting hole (6) is outside the filling grouting port (5); a plugging sleeve (7) covers the outer wall of the extended portion of the additive pipeline (4), and a plurality of plugging sleeve annular holes (8) are arranged on the plugging sleeve (7); the end of the plugging sleeve (7) close to the filling grouting port (5) is fixedly connected to the additive pipeline (4); the plugging sleeve (7) is made of elastic material.

2. The device for realizing synchronous dual-liquid slurry injection of a shield machine according to claim 1, characterized in that: A filling pump (1) is arranged at one end of the filling pipeline (2) away from the filling grouting port (5), and an additive pump (3) is arranged at one end of the additive pipeline (4) away from the additive grouting hole (6), and the additive pump (3) is outside the filling pump (1).

3. A device for realizing synchronous dual-liquid slurry injection of a shield according to claim 2, characterized in that: The additive pump (3) is a high-pressure cleaning machine.

4. The device for realizing synchronous dual-liquid slurry injection of a shield machine according to claim 1, characterized in that: A ball valve (41) is provided on the filling pipeline (2), one end of the ball valve (41) is connected to the additive pipeline (4), the additive pipeline (4) extends to the inside of the filling pipeline (2) through the ball valve (41), and the other end is fixedly connected to the filling pipeline (2).

5. The device for realizing synchronous dual-liquid slurry injection of a shield machine according to claim 1, characterized in that: A flow meter (42) and a pressure meter (43) are provided on the additive pipeline (4).

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