Shield tunnel segment grouting device

Abstract

The utility model discloses a shield tunnel segment grouting device which comprises a shield tunneling machine tail, a prefabricated segment, a plurality of grouting pipes and a plurality of accelerator spraying pipes, the shield tunneling machine tail is arranged on the periphery of the prefabricated segment, and a tail brush making contact with the outer wall of the prefabricated segment is arranged on the inner side face of the shield tunneling machine tail. A plurality of grouting pipes are arranged at the tail of the shield tunneling machine in a surrounding manner; in the utility model, the plurality of grouting pipes are arranged at the tail of the shield tunneling machine in a surrounding manner, the plurality of grouting pipes are all connected with the grouting machine of the shield tunneling machine, and the plurality of accelerator spraying pipes are arranged at the tail of the shield tunneling machine in a staggered manner relative to the plurality of grouting pipes; the multiple grouting pipes can carry out all-directional grouting operation on the water-rich sandy gravel stratum on the periphery of the prefabricated pipe piece, and an accelerator is injected into the water-rich sandy gravel stratum through the multiple accelerator spraying pipes and used for accelerating rapid solidification of mortar and increasing the grouting filling degree.

Description

Technical Field

[0001] The utility model relates to the technical field of shield construction, in particular to a shield tunnel segment grouting device. Background Art

[0002] Tunnel projects such as water conservancy and hydropower, subways, highways, railways, and municipal pipelines all use shield construction. In order to avoid tunnel leakage after the shield tunnel segments are laid, grouting operations are required during the shield tunnel segment laying stage.

[0003] However, in shield tunneling in water-rich sand and gravel strata, there are main problems such as insufficiency of arch grouting, large ground settlement, floating of formed tunnels, damage of segments, frequent secondary grouting, etc. The above problems are mainly caused by the existing shield tunneling using single synchronous grouting. Even if double-liquid slurry is used for synchronous grouting, the effect is not ideal. There is a problem of poor grouting fullness, and secondary grouting treatment is required, which not only results in low construction efficiency but also increases construction costs.

[0004] To this end, a shield tunnel segment grouting device is proposed, which has the advantages of multi-pipeline grouting and accelerated mortar solidification, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a shield tunnel segment grouting device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a shield tunnel segment grouting device, comprising a shield machine tail, a prefabricated segment, a plurality of grouting pipes and a plurality of accelerator spraying pipes, the outer periphery of the prefabricated segment is provided with a shield machine tail, and the inner side surface of the shield machine tail is provided with a tail brush in contact with the outer wall of the prefabricated segment, the shield machine tail is surrounded by a plurality of grouting pipes, and a plurality of accelerator spraying pipes are staggered between the plurality of grouting pipes, the end face of the shield machine tail is provided with an extension pipe connected to the accelerator spraying pipe, and a multi-porous nozzle is installed at one end of the extension pipe away from the shield machine tail, the inner side surface of the shield machine tail is fixedly connected with a fixed sleeve, and a power supply pipeline is inserted in the fixed sleeve, one end of the power supply pipeline is fixedly connected with a vibrating rod, and a supporting ear is fixedly connected with the surface of the vibrating rod, and a spring is provided between the supporting ear and the fixed sleeve.

[0007] As a further description of the above technical solution: a plurality of grouting nozzles are arranged on the end face of the tail of the shield machine, and the plurality of grouting nozzles are connected to a plurality of grouting pipes.

[0008] As a further description of the above technical solution: a plurality of the grouting pipes are connected to the main pipe of the mortar grouting machine of the shield equipment, and a plurality of the quick-setting agent spraying pipes are connected to another main pipe of the mortar grouting machine of the shield equipment.

[0009] As a further description of the above technical solution: two supporting ears are arranged at one end of the vibrating rod close to the fixed sleeve, and each supporting ear is provided with a spring connected to the fixed sleeve.

[0010] As a further description of the above technical solution: the length of the extension tube is greater than the length of the grouting nozzle, and the porous nozzle of the extension tube is a cylindrical structure, and a plurality of through holes are provided on the end surface of the porous nozzle of the extension tube.

[0011] As a further description of the above technical solution: a through hole is opened on the surface of the fixed sleeve corresponding to the power supply pipeline, and the fixed sleeve is welded to the inner side surface of the tail of the shield machine.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, a plurality of grouting pipes are arranged around the tail of the shield machine, and the plurality of grouting pipes are connected to the grouting machine of the shield equipment, and a plurality of accelerator spraying pipes are staggered with respect to the plurality of grouting pipes at the tail of the shield machine. When grouting the outer wall of the prefabricated pipe segment, the plurality of grouting pipes can implement all-round grouting operations on the water-rich sand and gravel stratum outside the prefabricated pipe segment, and the accelerator is injected into the water-rich sand and gravel stratum through the plurality of accelerator spraying pipes, so as to accelerate the rapid solidification of the mortar, increase the fullness of the grouting, and reduce the secondary grouting. On this basis, by starting the vibrating rod elastically installed at the tail of the shield machine, the mortar and the accelerator are dispersed in the form of vibration to ensure the mixing effect of the mortar and the accelerator. Compared with the existing single synchronous grouting method, the method of combining a plurality of grouting pipes and a plurality of accelerator spraying pipes has the advantages of full grouting, reduced secondary grouting construction, and shortened tunnel construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a shield tunnel segment grouting device of the utility model;

[0015] Figure 2 This is a sectional view of a shield tunnel segment grouting device of the utility model;

[0016] Figure 3 for Figure 2 A magnified view of the structure.

[0017] Legend:

[0018] 1. Shield machine tail; 2. Tail brush; 3. Grouting pipe; 4. Accelerator spraying pipe; 5. Prefabricated pipe segment; 6. Extension pipe; 7. Multi-hole nozzle; 8. Grouting nozzle; 9. Vibrating rod; 10. Fixed sleeve; 11. Support ear; 12. Spring; 13. Power supply pipeline. DETAILED DESCRIPTION

[0019] 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.

[0020] According to an embodiment of the utility model, a shield tunnel segment grouting device is provided.

[0021] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3 As shown, a shield tunnel segment grouting device according to an embodiment of the utility model comprises a shield machine tail 1, a prefabricated segment 5, a plurality of grouting pipes 3 and a plurality of accelerating agent spraying pipes 4, the shield machine tail 1 is arranged on the periphery of the prefabricated segment 5, and a tail brush 2 in contact with the outer wall of the prefabricated segment 5 is arranged on the inner side of the shield machine tail 1, a plurality of grouting pipes 3 are arranged around the shield machine tail 1, and a plurality of accelerating agent spraying pipes 4 are staggered between the plurality of grouting pipes 3, an extension pipe 6 connected to the accelerating agent spraying pipe 4 is arranged on the end face of the shield machine tail 1, and the extension pipe 6 is arranged on the end face of the shield machine tail 1. A porous nozzle 7 is installed at one end of the pipe 6 away from the tail 1 of the shield machine, a fixed sleeve 10 is fixedly connected to the inner side of the tail 1 of the shield machine, and a power supply pipeline 13 is inserted in the fixed sleeve 10, a vibrating rod 9 is fixedly connected to one end of the power supply pipeline 13, and a supporting ear 11 is fixedly connected to the surface of the vibrating rod 9, and a spring 12 is arranged between the supporting ear 11 and the fixed sleeve 10. In order to increase the mixing effect of the mortar and the quick-setting agent, two or more vibrating rods 9 are arranged in the device, and the vibrating rod 9 is electrically connected to the power supply of the shield equipment through the power supply pipeline 13;

[0022] In one embodiment, a plurality of grouting nozzles 8 are arranged on the end face of the tail 1 of the shield machine, and the plurality of grouting nozzles 8 are connected to a plurality of grouting pipes 3. By arranging the plurality of grouting nozzles 8, the mortar can be prevented from entering the tail brush 2 to the greatest extent.

[0023] In one embodiment, several grouting pipes 3 are connected to the main pipe of the mortar grouting machine of the shield equipment, and several accelerating agent spraying pipes 4 are connected to another main pipe of the mortar grouting machine of the shield equipment, so as to conveniently supply mortar and conventional accelerating agent for concrete.

[0024] In one embodiment, two supporting ears 11 are provided at one end of the vibration rod 9 close to the fixed sleeve 10, and each supporting ear 11 is provided with a spring 12 connected to the fixed sleeve 10. The setting of the spring 12 facilitates the installation of the vibration rod 9 and provides elasticity to facilitate the vibration of the vibration rod 9.

[0025] In one embodiment, the length of the extension tube 6 is greater than the length of the grouting nozzle 8, and the porous nozzle 7 of the extension tube 6 is a cylindrical structure, and a plurality of through holes are provided on the end face of the porous nozzle 7 of the extension tube 6. Through the setting of the extension tube 6, the sprayed quick-setting agent first enters the water-sand-pebble formation, and is quickly solidified when the mortar is injected into the water-sand-pebble formation later.

[0026] In one embodiment, a through hole is opened on the surface of the fixed sleeve 10 corresponding to the power supply pipeline 13, and the fixed sleeve 10 is welded to the inner side of the shield machine tail 1. The setting of the through hole facilitates the installation of the power supply pipeline 13 and provides an installation structure for the spring 12.

[0027] Working principle:

[0028] When in use, first connect several grouting pipes 3 with the main pipe of the mortar grouting machine of the shield equipment, and then connect several accelerator spraying pipes 4 with another main pipe of the mortar grouting machine of the shield equipment. When grouting the outer wall of the prefabricated pipe segment 5, several grouting pipes 3 can implement all-round grouting operations on the water-rich sand and gravel stratum outside the prefabricated pipe segment 5, and inject the accelerator into the water-rich sand and gravel stratum through several accelerator spraying pipes 4 to accelerate the rapid solidification of the mortar, increase the fullness of the grouting, and reduce the secondary grouting. At the same time, by starting the elastically installed vibration rod 9 at the tail 1 of the shield machine, the mortar and the accelerator are dispersed in the form of vibration to ensure the mixing effect of the mortar and the accelerator, further accelerate the solidification of the mortar, and maintain the fullness of the final grouting of the outer wall of the prefabricated pipe segment 5.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shield tunnel segment grouting device, comprising a shield machine tail (1), a prefabricated segment (5), a plurality of grouting pipes (3) and a plurality of quick-setting agent spraying pipes (4), characterized in that: A shield machine tail (1) is arranged on the periphery of the prefabricated pipe segment (5), and a tail brush (2) in contact with the outer wall of the prefabricated pipe segment (5) is arranged on the inner side of the shield machine tail (1), a plurality of grouting pipes (3) are arranged around the shield machine tail (1), and a plurality of quick-setting agent spraying pipes (4) are arranged alternately between the plurality of grouting pipes (3), and an extension pipe (6) connected to the quick-setting agent spraying pipe (4) is arranged on the end face of the shield machine tail (1), and the extension pipe ( 6) A porous nozzle (7) is installed at one end away from the tail (1) of the shield machine, a fixed sleeve (10) is fixedly connected to the inner side surface of the tail (1) of the shield machine, and a power supply pipeline (13) is inserted into the fixed sleeve (10), one end of the power supply pipeline (13) is fixedly connected to a vibration rod (9), and a support ear (11) is fixedly connected to the surface of the vibration rod (9), and a spring (12) is arranged between the support ear (11) and the fixed sleeve (10).

2. A shield tunnel segment grouting device according to claim 1, characterized in that: A plurality of grouting nozzles (8) are arranged on the end surface of the shield machine tail (1), and the plurality of grouting nozzles (8) are connected to a plurality of grouting pipes (3).

3. A shield tunnel segment grouting device according to claim 1, characterized in that: A plurality of the grouting pipes (3) are connected to the main pipe of the mortar grouting machine of the shield equipment, and a plurality of the quick-setting agent spraying pipes (4) are connected to another main pipe of the mortar grouting machine of the shield equipment.

4. A shield tunnel segment grouting device according to claim 1, characterized in that: Two supporting ears (11) are arranged at one end of the vibrating rod (9) close to the fixing sleeve (10), and each supporting ear (11) is provided with a spring (12) connected to the fixing sleeve (10).

5. A shield tunnel segment grouting device according to claim 1, characterized in that: The length of the extension tube (6) is greater than the length of the grouting nozzle (8), and the porous nozzle (7) of the extension tube (6) is of a cylindrical structure, and a plurality of through holes are provided on the end surface of the porous nozzle (7) of the extension tube (6).

6. A shield tunnel segment grouting device according to claim 1, characterized in that: A through hole is provided on the surface of the fixing sleeve (10) corresponding to the power supply pipeline (13), and the fixing sleeve (10) is welded to the inner side surface of the shield machine tail (1).

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