Combined grouting device for shield tunneling machine shell and using method of combined grouting device

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a combined grouting device for a shield tunneling machine shell and a using method of the combined grouting device. Comprising a first pipeline, the input end of which is connected with an input pipe of first liquid; the second pipeline is arranged in the first pipeline, the first end part of the second pipeline is connected with an input pipe of second liquid, and a plurality of through holes are uniformly formed in the second pipeline; the third pipeline is connected with the output end of the first pipeline, and the output end of the third pipeline is inserted into the shield tunneling machine shell; and the stirring mechanism is arranged in the third pipeline and can be used for further stirring the mixed liquid. The device has the beneficial effects that the second pipeline provided with the through holes is arranged in the first pipeline, so that second liquid uniformly enters the first pipeline through the through holes and is fully mixed with the first pipeline to form mixed liquid, then the mixed liquid enters the third pipeline, and the stirring mechanism further stirs the mixed liquid; and injecting the mixed solution between a shield tunneling machine shell and a soil layer.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, and in particular to a combined grouting device for a shield machine shell and a use method thereof. Background Art

[0002] At present, in the construction process of sharp curve tunnels, in order to enable the shield machine to pass through the sharp curve construction section, the inner side of the curve needs to be excavated to a larger space than the outer diameter of the shield by using a profiling cutter, so that the shield can be opened and hinged to realize turning. However, the over-excavation of the profiling cutter disturbs the soil greatly and also increases the gap between the shield machine shell and the soil. In order to prevent mud and water from flowing back and reduce the disturbance and deformation of the stratum, the shell is generally injected with mud effect (a filling material) to fill the gap between the cutter head excavation contour and the outer edge of the shield body with high viscosity and plastic slurry to close the gap between the shell and the soil. Since the conventional high viscosity and plastic slurry has a short initial setting time after mixing, high viscosity, poor fluidity, and easy to block the pipe, the conventional high viscosity and plastic slurry injection method is to use a three-way pipe to mix liquid A and liquid B on the outside of the shell. However, due to the influence of water and soil pressure, groundwater, stratum characteristics and mud and water in the front cabin of the shield machine, the slurry flow trajectory is uncontrollable, which easily leads to uneven mixing of the two liquids and fails to achieve the purpose of construction control. There is a new admixture that can be used to mix bentonite with the admixture to form a high plastic gel. The viscosity is less than the mud effect, and the slurry mixing fluidity is better. However, when tested using the mixing method outside the shell, the mixing effect is not ideal, the uniformity is poor, and a gel state cannot be formed.

[0003] Therefore, the present invention provides a combined grouting device for a shield machine casing and a method for using the same. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a combined grouting device for a shield machine shell and a method of using the same, so as to solve the problem that the existing high-plasticity gel has an unsatisfactory mixing effect, poor uniformity and cannot form a gel state during mixing.

[0005] The present invention provides a combined grouting device for a shield machine shell, and its technical solution is as follows: it comprises: a first pipeline, the input end of the first pipeline is connected to the input pipe of a first liquid; a second pipeline arranged in the first pipeline, the first end of the second pipeline is connected to the input pipe of a second liquid, and a plurality of through holes are evenly opened on the second pipeline, and the second liquid enters the first pipeline through the through holes and mixes with the first liquid to form a mixed liquid; a third pipeline connected to the output end of the first pipeline, the output end of the third pipeline is inserted into the shield machine shell, so that the mixed liquid is injected into between the shield machine shell and the soil layer; and a stirring mechanism arranged in the third pipeline that can further stir the mixed liquid.

[0006] Furthermore, it also includes a connector and a one-way valve, wherein the connector is arranged at one end of the first pipeline close to the input end, the inner end of the connector is connected to the first end of the second pipeline, and the outer end is connected to the input pipe of the second liquid, and the one-way valve is located between the connector and the input pipe of the second liquid.

[0007] Furthermore, a liquid inlet pipe is provided on the third pipeline, and the liquid inlet pipe is located on a side away from the output end, and the output end of the first pipeline is connected to the liquid inlet pipe.

[0008] Furthermore, the stirring mechanism includes: a motor, which is arranged at one end of the third pipeline close to the liquid inlet pipe; a rotating shaft, which is rotatably arranged in the third pipeline, and the rotating shaft is coaxially arranged with the third pipeline, and one end of the rotating shaft close to the motor extends out of the third pipeline and is drivingly connected to the motor; a spiral stirring paddle, which is fixed on the surface of the rotating shaft, and when the spiral stirring paddle rotates, it pushes the mixed liquid to move toward the output end of the third pipeline.

[0009] Furthermore, it also includes two support seats, a sealing block and two bearings arranged on the third pipe, the support seat is annular, and at least three connecting rods are evenly fixed on the outer surface of the ring, and the connecting rods are fixed at two ends of the third pipe; the two bearings are fixed in the corresponding rings of the support seats, and the two ends of the rotating shaft are coaxially fixed to the inner sides of the corresponding bearings; the sealing block is located at one end of the third pipe close to the motor and seals the end, and the corresponding end of the rotating shaft passes through the sealing block.

[0010] The present invention also provides a method for using a combined grouting device for a shield machine shell, comprising the following specific steps: connecting the input end of the first pipeline with the input pipe of the first liquid, and connecting the output end of the first pipeline with the third pipeline; connecting the input pipe of the second liquid with the first end of the second pipeline; inserting the output end of the third pipeline into the shield machine shell; opening the input pipes of the first liquid and the second liquid, allowing the first liquid to enter the first pipeline, the second liquid to enter the second pipeline and enter the first pipeline through a through hole to mix with the first liquid to form a mixed liquid, and the mixed liquid further flows into the third pipeline; opening the stirring mechanism in the third pipeline, allowing the stirring mechanism to stir the mixed liquid in the third pipeline, so that the stirred mixed liquid enters the gap between the shield machine shell and the soil layer.

[0011] Furthermore, the hydraulic pressure in the second pipeline is greater than the hydraulic pressure in the first pipeline, and the second liquid in the second pipeline is ejected from the through hole, quickly enters the first pipeline and mixes with the first liquid.

[0012] Furthermore, the stirring process of the stirring mechanism is as follows: turn on the motor, the motor drives the rotating shaft to rotate, the rotating shaft drives the spiral stirring paddle to rotate, the spiral stirring paddle stirs the mixed liquid and simultaneously generates a thrust for the mixed liquid toward the output end of the third pipeline.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By arranging a second pipe with a through hole in the first pipe, the second liquid can enter the first pipe evenly through the through hole and be fully mixed with the second liquid to form a mixed liquid. The mixed liquid then enters the third pipe, the stirring mechanism further stirs the mixed liquid, and then the mixed liquid is injected between the shield machine shell and the soil layer.

[0015] By providing a one-way valve, the second liquid in the second pipe can be prevented from flowing back. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the combined grouting device for the shield machine shell of the present invention.

[0017] Figure 2 It is a schematic diagram of the first pipeline of the combined grouting device for the shield machine shell of the present invention.

[0018] Figure 3 It is a schematic diagram of the third pipeline of the combined grouting device for the shield machine shell of the present invention.

[0019] Figure 4 The combined grouting device for the shield machine shell of the present invention is Figure 3 Enlarged view of part A.

[0020] Figure 5 The combined grouting device for the shield machine shell of the present invention is Figure 3 Enlarged view of part B.

[0021] Figure 6 It is a side view of the third pipeline of the combined grouting device for the shield machine shell of the present invention.

[0022] Figure 7 It is a schematic diagram of the stirring shaft of the combined grouting device for the shield machine shell of the present invention.

[0023] Figure 8 It is a schematic diagram of a sealing block of a combined grouting device for a shield machine casing of the present invention.

[0024] Legend: 1. First pipeline; second pipeline; 3. Third pipeline; 4. Screw agitator; 5. Motor; 6. Coupling; 7. First sealing ring; 8. One-way valve; 9. Connector; 10. Rotating shaft; 11. Shield machine shell; 12. Shell grouting hole; 13. Soil layer; 14. Sealing block; 15. Grease injection hole; 16. Chamber; 17. Second sealing ring; 18. Support seat; 19. End cover; 20. Bearing; 21. Connector. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] See also Figure 1 The present invention provides a combined grouting device for a shield machine housing and a method for using the same, which solves the problem that the existing high-plasticity gel has an unsatisfactory mixing effect, poor uniformity, and cannot form a gel state when being mixed. A second pipe with a through hole is provided in the first pipe, so that the second liquid enters the first pipe evenly through the through hole and is fully mixed with the second liquid to form a mixed liquid, and then the mixed liquid enters the third pipe, and the stirring mechanism further stirs the mixed liquid, and then the mixed liquid is injected between the shield machine housing and the soil layer. By providing a one-way valve, the second liquid in the second pipe can be prevented from flowing back.

[0027] The combined grouting device for a shield machine casing and its use method of the present invention are described below in conjunction with the accompanying drawings.

[0028] See also Figure 1 , showing a cross-sectional view of a combined grouting device for a shield machine casing according to the present invention. Figure 2 , showing a schematic diagram of a first pipeline of a combined grouting device for a shield machine casing according to the present invention. Figure 3 , showing a third pipeline schematic diagram of the combined grouting device for the shield machine shell of the present invention. Figures 1 to 3 , a combined grouting device for a shield machine casing and a method of using the same are described in the present invention.

[0029] like Figures 1 to 3As shown, a combined grouting device for a shield machine shell of the present invention comprises: a first pipeline 1, the input end of the first pipeline 1 is connected to the input pipe of a first liquid; a second pipeline 2 arranged in the first pipeline 1, the first end of the second pipeline 2 is connected to the input pipe of a second liquid, and a plurality of through holes are evenly opened on the second pipeline 2, and the second liquid enters the first pipeline 1 through the through holes and mixes with the first liquid to form a mixed liquid; a third pipeline 3 connected to the output end of the first pipeline 1, the output end of the third pipeline 3 is inserted into the shield machine shell 11, so that the mixed liquid is injected into between the shield machine shell 11 and the soil layer 13; and a stirring mechanism arranged in the third pipeline 3 for further stirring the mixed liquid.

[0030] In a specific embodiment, the hydraulic pressure in the second pipeline 2 is greater than the hydraulic pressure in the first pipeline 1. By setting the hydraulic pressure in the second pipeline 2 to be greater than the hydraulic pressure in the first pipeline 1, it is possible to prevent the first liquid in the first pipeline 1 from flowing back into the first pipeline 1, resulting in an unsatisfactory mixing effect.

[0031] In a specific embodiment, the output end of the third pipeline 3 is inserted into the shell grouting hole 12 on the shield machine shell 11 to inject the mixed liquid in the third pipeline 3 into between the shield machine shell 11 and the soil layer 13 .

[0032] In a specific embodiment, the second pipe 2 and the first pipe 1 are located on the same axis. By arranging the second pipe 2 and the first pipe 1 on the same axis, the second liquid can be mixed with the first liquid more evenly after being ejected from the through hole.

[0033] In a specific embodiment, the through holes are evenly distributed in one circle and multiple circles along the central axis of the second pipe 2, and the through holes in adjacent circles are staggered. By staggering the through holes in two adjacent circles, the second liquid can be sprayed out from the second pipe 2 in a staggered manner, thereby preventing the through holes from being too concentrated and causing uneven mixing of the first liquid and the second liquid.

[0034] In a specific embodiment, the through hole is perpendicular to the surface of the second pipe 2 .

[0035] In a specific embodiment, the length of the second pipe 2 is shorter than that of the first pipe 1 , and a sealing plug is provided at the second end of the second pipe 2 .

[0036] In a specific embodiment, it also includes a connector 9 and a one-way valve 8. The connector 9 is arranged at one end of the first pipeline 1 close to the input end. The inner end of the connector 9 is connected to the first end of the second pipeline 2, and the outer end is connected to the input pipe of the second liquid. The one-way valve 8 is located between the connector 9 and the input pipe of the second liquid.

[0037] In a specific embodiment, a first end portion of the second pipe 2 is provided with a bent portion, and the bent portion is sealed and connected to the inner end of the connector 9 .

[0038] In a specific embodiment, a first sealing ring 7 is provided at the connection between the connector 9 and the second pipe 2 .

[0039] In a specific embodiment, a liquid inlet pipe is provided on the third pipeline 3 , and the liquid inlet pipe is located at a side away from the output end, and the output end of the first pipeline 1 is connected to the liquid inlet pipe.

[0040] In a specific embodiment, the stirring mechanism includes: a motor 5, which is arranged at one end of the third pipeline 3 close to the liquid inlet pipe; a rotating shaft 10, which is rotatably arranged in the third pipeline 3, and the rotating shaft 10 is coaxially arranged with the third pipeline 3, and one end of the rotating shaft 10 close to the motor 5 extends out of the third pipeline 3 and is drivingly connected to the motor 5; a spiral stirring paddle 4, which is fixed on the surface of the rotating shaft 10, and when the spiral stirring paddle 4 rotates, it pushes the mixed liquid to move toward the output end of the third pipeline 3.

[0041] In a specific embodiment, a coupling 6 is further included, one end of which is fixedly connected to the output shaft of the motor 5 , and the other end of which is fixedly connected to the rotating shaft 10 .

[0042] In a specific embodiment, it also includes two support seats 18, a sealing block 14 and two bearings 20 arranged on the third pipe 3, the support seat 18 is annular, and at least three connecting rods are evenly fixed on the outer surface of the ring, and the connecting rods are fixed at two ends of the third pipe 3; the two bearings 20 are fixed in the corresponding rings of the support seats 18, and the two ends of the rotating shaft 10 are coaxially fixed to the inner sides of the corresponding bearings 20; the sealing block 14 is located at one end of the third pipe 3 close to the motor 5 and seals the end, and the corresponding end of the rotating shaft 10 passes through the sealing block 14.

[0043] In a specific embodiment, a clamp is provided at the connection between the sealing block 14 and the third pipe 3, and the clamp connects the sealing block 14 and the third pipe 3. A rubber sealing pad for sealing is provided on the inner side of the clamp.

[0044] In a specific embodiment, a chamber 16 is provided in the sealing block 14, and the chamber 16 is filled with grease. Second sealing rings 17 for sealing the grease are provided at both ends of the chamber 16, and two grease injection holes 15 for injecting grease are provided on the sealing block 14. By providing the chamber 16 filled with grease, the friction force on the rotating shaft 10 during rotation is reduced, thereby increasing the stirring effect.

[0045] In a specific embodiment, an end cover 19 is provided on the support seat 18 at the output end of the third pipeline 3 , and the end cover 19 is fixedly connected to the support seat 18 via the connecting piece 21 .

[0046] In a preferred embodiment, the connecting member 21 is a bolt.

[0047] The present invention also provides a method for using a combined grouting device for a shield machine shell, comprising the following specific steps: connecting the input end of the first pipeline 1 to the input pipe of the first liquid, and connecting the output end of the first pipeline 1 to the third pipeline 3; connecting the input pipe of the second liquid to the first end of the second pipeline 2; inserting the output end of the third pipeline 3 into the shield machine shell 11; opening the input pipes of the first liquid and the second liquid, allowing the first liquid to enter the first pipeline 1, and the second liquid to enter the second pipeline 2 and enter the first pipeline 1 through a through hole to mix with the first liquid to form a mixed liquid, and the mixed liquid further flows into the third pipeline 3; opening the stirring mechanism in the third pipeline 3, so that the stirring mechanism stirs the mixed liquid in the third pipeline 3, so that the stirred mixed liquid enters the gap between the shield machine shell 11 and the soil layer 13.

[0048] In a specific embodiment, the hydraulic pressure in the second pipeline 2 is greater than the hydraulic pressure in the first pipeline 2, and the second liquid in the second pipeline 2 is ejected from the through hole, quickly enters the first pipeline 1 and mixes with the first liquid.

[0049] In a specific embodiment, the stirring process of the stirring mechanism is as follows: turn on the motor 5, the motor 5 drives the rotating shaft 10 to rotate, the rotating shaft 10 drives the spiral stirring paddle 4 to rotate, the spiral stirring paddle 4 stirs the mixed liquid and generates a thrust for the mixed liquid toward the output end of the third pipe 3.

[0050] The following is a detailed description of the use process of the combined grouting device for the shield machine shell of the present invention.

[0051] The output end of the first pipeline 1 is sealed and connected to the liquid inlet pipe of the third pipeline 3. Then, the input pipes of the first liquid and the second liquid are opened, so that the first liquid is pumped into the first pipeline 1, and the second liquid is pumped into the second pipeline 2 through the one-way valve 8 and the connector 9. The second liquid is sprayed into the first pipeline 1 through the plurality of through holes and mixed with the first liquid to form a mixed liquid, and then the mixed liquid enters the third pipeline 3 through the liquid inlet pipe.

[0052] Then, the motor 5 is turned on, and the motor 5 drives the rotating shaft 10 to rotate through the coupling 6, and the rotating shaft 10 drives the spiral stirring paddle 4 to rotate, so that the spiral stirring paddle 4 stirs the mixed liquid in the third pipeline 3. At the same time, the rotation of the spiral stirring paddle 4 can generate thrust for the mixed liquid, so that the mixed liquid flows to the output end of the third pipeline 3 and flows into between the shield machine housing 11 and the soil layer 13.

[0053] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A combined grouting device for a shield machine casing, characterized in that: include: A first pipeline (1), the input end of which is connected to an input pipe of a first liquid; a second pipe (2) disposed in the first pipe (1), the first end of the second pipe (2) being connected to an input pipe for a second liquid, the second pipe (2) being evenly provided with a plurality of through holes, the second liquid entering the first pipe (1) through the through holes and mixing with the first liquid to form a mixed liquid; a third pipeline (3) connected to the output end of the first pipeline (1), wherein the output end of the third pipeline (3) is inserted into the shield machine casing (11) so that the mixed liquid is injected between the shield machine casing (11) and the soil layer (13); A stirring mechanism is provided in the third pipe (3) and can further stir the mixed liquid.

2. A combined grouting device for a shield machine casing according to claim 1, characterized in that: The invention also comprises a connector (9) and a one-way valve (8), wherein the connector (9) is arranged at one end of the first pipeline (1) close to the input end, the inner end of the connector (9) is connected to the first end of the second pipeline (2), and the outer end is connected to the input pipe of the second liquid, and the one-way valve (8) is located between the connector (9) and the input pipe of the second liquid.

3. The combined grouting device for a shield machine casing according to claim 1, characterized in that: The third pipeline (3) is provided with a liquid inlet pipe, the liquid inlet pipe is located on a side away from the output end, and the output end of the first pipeline (1) is connected to the liquid inlet pipe.

4. A combined grouting device for a shield machine casing according to claim 3, characterized in that: The stirring mechanism comprises: a motor (5), the motor (5) being arranged at an end of the third pipeline (3) close to the liquid inlet pipe; a rotating shaft (10), the rotating shaft (10) being rotatably disposed in the third pipe (3), the rotating shaft (10) being coaxially disposed with the third pipe (3), and one end of the rotating shaft (10) close to the motor (5) extending out of the third pipe (3) and being drivingly connected to the motor (5); A spiral stirring paddle (4), wherein the spiral stirring paddle (4) is fixedly mounted on the surface of the rotating shaft (10), and when the spiral stirring paddle (4) rotates, it pushes the mixed liquid to move toward the output end of the third pipeline (3).

5. The combined grouting device for a shield machine casing according to claim 4, characterized in that: It also comprises two support seats (18), a sealing block (14) and two bearings (20) arranged on the third pipe (3); the support seat (18) is annular, and at least three connecting rods are evenly fixed on the outer surface of the annular ring; the connecting rods are fixed at two ends of the third pipe (3); The two bearings (20) are fixedly arranged in the circular ring of the corresponding support seat (18), and the two ends of the rotating shaft (10) are coaxially fixedly connected to the inner side of the corresponding bearing (20); The sealing block (14) is located at one end of the third pipe (3) close to the motor (5) and seals the end; a corresponding end of the rotating shaft (10) passes through the sealing block (14).

6. A method for using the combined grouting device for a shield machine casing according to claim 1, characterized in that: The specific steps include: Connecting the input end of the first pipeline (1) to the input pipe of the first liquid, and connecting the output end of the first pipeline (1) to the third pipeline (3); Connecting the input pipe of the second liquid to the first end of the second pipe (2); Inserting the output end of the third pipeline (3) into the shield machine casing (11); Opening the input pipes of the first liquid and the second liquid, allowing the first liquid to enter the first pipe (1), the second liquid to enter the second pipe (2) and then enter the first pipe (1) through the through hole to mix with the first liquid to form a mixed liquid, and the mixed liquid further flows into the third pipe (3); The stirring mechanism in the third pipe (3) is turned on to stir the mixed liquid in the third pipe (3), so that the stirred mixed liquid enters the gap between the shield machine casing (11) and the soil layer (13).

7. The method for using the combined grouting device for a shield machine casing according to claim 6, characterized in that: The hydraulic pressure in the second pipeline (2) is greater than the hydraulic pressure in the first pipeline (2), and the second liquid in the second pipeline (2) is ejected from the through hole, quickly enters the first pipeline (1) and mixes with the first liquid.

8. The method for using the combined grouting device for a shield machine casing according to claim 6, characterized in that: The stirring process of the stirring mechanism is as follows: The motor (5) is turned on, and the motor (5) drives the rotating shaft (10) to rotate, and the rotating shaft (10) drives the spiral stirring paddle (4) to rotate, and the spiral stirring paddle (4) stirs the mixed liquid and generates a thrust for the mixed liquid toward the output end of the third pipeline (3).

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