CN210768784U - External sealing structure for tunnel boring machine - Google Patents
External sealing structure for tunnel boring machine Download PDFInfo
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- CN210768784U CN210768784U CN201920612330.4U CN201920612330U CN210768784U CN 210768784 U CN210768784 U CN 210768784U CN 201920612330 U CN201920612330 U CN 201920612330U CN 210768784 U CN210768784 U CN 210768784U
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Abstract
An external sealing structure for a tunnel boring machine is used for effectively preventing filling slurry from flowing to a boring machine cutter head and ensuring the boring efficiency of the tunnel boring machine. External seal structure sets up in tunnel boring machine steel casing afterbody, and tunnel lining structure extends into steel casing afterbody certain distance, and slurry, characterized by are filled in the annular space between tunnel lining structure periphery wall and the tunnel excavation back hair hole wall: the steel casing tail end is fixed on its periphery wall and is set up outer annular spring steel sheet, and after outer annular spring steel sheet on the steel casing periphery wall fixed set up at least one terminal outer annular steel brush that keeps in contact with the tunnel excavation back hair hole wall, between outer annular spring steel sheet and the outer annular steel brush, inject sealed grease into in the outer annular cavity between the adjacent outer annular steel brush and form sealedly, block that the thick liquid scurries into in the space between the hair hole wall behind steel casing periphery wall and the tunnel excavation.
Description
Technical Field
The utility model relates to a tunnel boring machine, in particular to an external seal structure for tunnel boring machine.
Background
In recent years, with the rapid development of construction industry in China, the scale of tunnel engineering construction represented by subways, highways and municipal works is increased year by year, and tunnel boring machines are more and more widely applied to urban tunnel construction and underwater tunnel construction due to the characteristics of non-excavation, mechanized construction, safety, rapidness and the like of the tunnel boring machines except for the traditional open excavation method, mining method, shallow-buried excavation method and other construction methods.
In order to reduce the stratum resistance suffered by the heading machine when the heading machine is pushed forwards, the excavation section size of the heading machine is usually larger than the section size of a tunnel, and a gap is artificially formed between the tunnel and the stratum. In order to control the ground settlement, the rear part of the heading machine is usually provided with a hole for synchronous grouting, and the gap is filled.
When the tunnel boring machine is used for construction, the front part of the tunnel boring machine uses machinery to dig a soil body, and the tail part of the tunnel boring machine is connected with a tunnel lining. In order to ensure that external water and soil do not permeate into the interior of the heading machine during construction, a seal is usually arranged at the joint of the tail part and the tunnel lining.
The existing seal is usually only arranged between the inner surface of the shell of the heading machine and the outer surface of the tunnel lining, and the gap filling slurry injected during the construction of the heading machine can flow to a cutter head of the heading machine along the outer surface of the shell of the heading machine. In severe cases, the slurry is solidified on the outer surface of the shell of the heading machine, so that the propelling resistance of the heading machine is increased, even the cutter head is stuck, the torque of the cutter head is increased, and the soil excavation and cutting efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an external seal structure for tunnel boring machine is provided to effectively avoid filling the thick liquid and scurry to the entry driving machine blade disc, ensure tunnel boring machine efficiency of digging.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses an external seal structure for tunnel boring machine sets up in tunnel boring machine steel casing afterbody, and the tunnel lining structure extends into steel casing afterbody certain distance, and the slurry is filled in the annular space between tunnel lining structure periphery wall and the tunnel excavation back hair hole wall, characterized by: the steel casing tail end is fixed on its periphery wall and is set up outer annular spring steel sheet, and after outer annular spring steel sheet on the steel casing periphery wall fixed set up at least one terminal outer annular steel brush that keeps in contact with the tunnel excavation back hair hole wall, between outer annular spring steel sheet and the outer annular steel brush, inject sealed grease into in the outer annular cavity between the adjacent outer annular steel brush and form sealedly, block that the thick liquid scurries into in the space between the hair hole wall behind steel casing periphery wall and the tunnel excavation.
The beneficial effects of the utility model are that, can effectively with the thick liquid separation outside the entry driving machine casing, prevent that the thick liquid from scurrying into the clearance between the hair hole wall behind entry driving machine casing and the tunnel excavation forward, avoid causing the thick liquid to solidify the casing, paste and live the blade disc, ensure tunnel boring machine and dig efficiency.
Drawings
The specification includes the following five figures:
fig. 1 is a longitudinal sectional view of an external sealing structure for a tunnel boring machine according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
fig. 4 is a schematic view of the use state of the external sealing structure for the tunnel boring machine of the present invention;
fig. 5 is an enlarged schematic view of a portion C of fig. 4.
The figures show the components and corresponding references: the tunnel boring machine comprises a tunnel boring machine 10, a steel shell 11, an outer layer annular steel wire brush 12, an inner layer annular steel wire brush 13, an inner annular spring steel plate 14, an outer annular spring steel plate 15, a grease conveying channel 16, a tunnel lining structure 20, an annular gap 21, a tunnel excavated rough hole wall 22, grout 31 and sealing grease 32.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1 to 5, the utility model discloses an external seal structure for tunnel boring machine sets up in 11 afterbody of tunnel boring machine 10 steel casing, and tunnel lining structure 20 extends into 11 afterbody certain distances of steel casing, and annular space 21 between tunnel lining structure 20 periphery wall and the tunnel excavation back hair hole wall 22 fills thick liquid 31. The tail end of the steel shell 11 is fixedly provided with an outer annular spring steel plate 15 on the outer peripheral wall of the steel shell 11, at least one outer annular steel wire brush 12 with the tail end kept in contact with the tunnel excavation rear capillary wall 22 is fixedly arranged on the outer peripheral wall of the steel shell 11 behind the outer annular spring steel plate 15, sealing grease 32 is injected into an outer annular cavity between the outer annular spring steel plate 15 and the outer annular steel wire brush 12 and between adjacent outer annular steel wire brushes 12 to form sealing, and slurry 31 is prevented from entering a gap between the outer peripheral wall of the steel shell 11 and the tunnel excavation rear capillary wall 22.
An inner annular spring steel plate 14 is fixedly arranged on the inner circumferential wall of the tail end of the steel shell 11, at least one inner annular steel wire brush 13 with the tail end kept in contact with the outer circumferential wall of the tunnel lining structure 20 is fixedly arranged on the inner circumferential wall of the steel shell 11 behind the inner annular spring steel plate 14, and sealing grease 32 is injected into an inner annular cavity between the inner annular spring steel plate 14 and the inner annular steel wire brush 13 and between adjacent inner annular steel wire brushes 13 to form sealing.
Referring to fig. 1 and 3, the front section of the outer ring spring steel plate 15 is attached to the outer peripheral wall of the steel shell 11, and the rear section is bent towards the tail of the tunnel boring machine 10 and faces the tunnel excavation rear rough hole wall 22. The front section of the inner annular spring steel plate 14 is attached to the inner peripheral wall of the steel shell 11, and the rear section is bent towards the tail of the tunnel boring machine 10 and faces the outer peripheral wall of the tunnel lining structure 20. On the vertical section of the tail part of the steel shell 11, the sections of the outer annular spring steel plate 15 and the inner annular spring steel plate 14 are trumpet-shaped.
Referring to fig. 3 and 5, a grease conveying channel 16 communicated with each outer annular cavity and each inner annular cavity is arranged at the tail part of the steel shell 11.
Referring to fig. 4 and 5, when the tunnel boring machine 10 is in construction, an annular gap 21 is formed between the tunnel wall 22 after tunnel excavation and the outer peripheral wall of the tunnel lining structure 20 formed by splicing the prefabricated segments, and the tunnel lining structure 20 extends into the tail of the steel shell 11 for a certain distance. The tunnel boring machine 10 continues to fill the annular space 21 with grout 31 during propulsion. Meanwhile, inside the tunnel boring machine 10, the sealing grease 32 is continuously injected into the inner annular cavities between the inner annular steel wire brushes 13 and the inner annular spring steel plates 14 and between the adjacent inner annular steel wire brushes 13 through the grease conveying passage 16, and the outer annular cavities between the outer annular steel wire brushes 12 and the outer annular spring steel plates 15 and between the adjacent outer annular steel wire brushes 12, so as to balance the pressure of the grout 31 and prevent the grout from flowing to the cutter head through the gap between the boring machine shell and the tunnel excavation rear tunnel wall.
The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the patent scope applied by the present invention.
Claims (4)
1. The utility model provides an external seal structure for tunnel boring machine sets up in tunnel boring machine (10) steel casing (11) afterbody, and tunnel lining structure (20) extend into steel casing (11) afterbody certain distance, and annular space (21) between tunnel lining structure (20) periphery wall and the tunnel excavation back hair hole wall (22) are filled thick liquid (31), characterized by: the steel casing (11) tail end is fixed on its periphery wall and is set up outer annular spring steel sheet (15), and in outer annular spring steel sheet (15) after on steel casing (11) periphery wall fixed set up at least one terminal outer annular steel brush (12) that keep in contact with hair hole wall (22) behind the tunnel excavation, between outer annular spring steel sheet (15) and outer annular steel brush (12), inject sealed grease (32) into in the outer annular cavity between adjacent outer annular steel brush (12) and form sealedly, block in the clearance between hair hole wall (22) behind thick liquid (31) the scurrying into steel casing (11) periphery wall and the tunnel excavation.
2. An outboard sealing structure for a tunnel boring machine according to claim 1, wherein: an inner annular spring steel plate (14) is fixedly arranged on the inner circumferential wall of the tail end of the steel shell (11), at least one inner annular steel wire brush (13) with the tail end kept in contact with the outer circumferential wall of the tunnel lining structure (20) is fixedly arranged on the inner circumferential wall of the steel shell (11) behind the inner annular spring steel plate (14), and sealing grease (32) is injected into an inner annular cavity between the inner annular spring steel plate (14) and the inner annular steel wire brush (13) and between adjacent inner annular steel wire brushes (13) to form sealing.
3. An outboard sealing structure for a tunnel boring machine according to claim 2, wherein: the front section of the outer annular spring steel plate (15) is attached to the outer peripheral wall of the steel shell (11), and the rear section of the outer annular spring steel plate is bent towards the tail of the tunnel boring machine (10) and faces a tunnel excavation rear rough hole wall (22); the front section of the inner annular spring steel plate (14) is attached to the inner peripheral wall of the steel shell (11), and the rear section of the inner annular spring steel plate is bent towards the tail of the tunnel boring machine (10) and faces the outer peripheral wall of the tunnel lining structure (20); on the longitudinal section of the tail part of the steel shell (11), the sections of the outer annular spring steel plate (15) and the inner annular spring steel plate (14) are trumpet-shaped.
4. An outboard sealing structure for a tunnel boring machine according to claim 1, wherein: and a grease conveying channel (16) communicated with each outer annular cavity and each inner annular cavity is arranged at the tail part of the steel shell (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612330.4U CN210768784U (en) | 2019-04-25 | 2019-04-25 | External sealing structure for tunnel boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612330.4U CN210768784U (en) | 2019-04-25 | 2019-04-25 | External sealing structure for tunnel boring machine |
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| Publication Number | Publication Date |
|---|---|
| CN210768784U true CN210768784U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920612330.4U Active CN210768784U (en) | 2019-04-25 | 2019-04-25 | External sealing structure for tunnel boring machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056364A (en) * | 2019-04-25 | 2019-07-26 | 中铁二院工程集团有限责任公司 | A kind of external sealing structure for rock tunnel(ling) machine |
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2019
- 2019-04-25 CN CN201920612330.4U patent/CN210768784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056364A (en) * | 2019-04-25 | 2019-07-26 | 中铁二院工程集团有限责任公司 | A kind of external sealing structure for rock tunnel(ling) machine |
| CN110056364B (en) * | 2019-04-25 | 2024-03-22 | 中铁二院工程集团有限责任公司 | External sealing structure for tunnel boring machine |
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