CN217652729U - Large-diameter slurry balance shield ultra-shallow buried starting tunnel portal sealing device - Google Patents
Large-diameter slurry balance shield ultra-shallow buried starting tunnel portal sealing device Download PDFInfo
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- CN217652729U CN217652729U CN202220040101.1U CN202220040101U CN217652729U CN 217652729 U CN217652729 U CN 217652729U CN 202220040101 U CN202220040101 U CN 202220040101U CN 217652729 U CN217652729 U CN 217652729U
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- steel ring
- buried
- portal steel
- plate
- curtain cloth
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The sealing device for the ultra-shallow buried starting tunnel portal of the large-diameter slurry balance shield effectively improves the sealing property, the water stopping effect and the safety. The inner ring wall of the embedded portal steel ring is fixedly provided with a middle fixing ring plate, the outer end ring of the embedded portal steel ring and the middle fixing ring plate are provided with mounting holes at intervals in the circumferential direction, long bolts penetrate through the mounting holes in the outer fixing ring plate and the folding pressing plate to fixedly mount outer curtain cloth rubber on the outer end ring plate of the embedded portal steel ring, and short bolts penetrate through the mounting holes in the middle fixing ring plate to fixedly mount the middle curtain cloth rubber on the middle fixing ring plate; when the shield cutter head enters the pre-buried portal steel ring, a first seal and a second seal are respectively formed with the outer curtain cloth rubber and the middle curtain cloth rubber. And grouting pipes leading to the cavities between the outer side cord fabric rubber and the middle cord fabric rubber are arranged at the upper part of the pre-buried portal steel ring at intervals along the circumferential direction.
Description
Technical Field
The utility model relates to a shield tunnel, in particular to major diameter slurry balance shield constructs super shallow tunnel portal sealing device that starts that buries.
Background
The shield launching is an important link in shield construction and is one of major risk points of the shield construction, and the large-diameter shield ultra-shallow launching risk is higher. The existing shield starting tunnel portal sealing device is generally provided with a curtain cloth rubber without a grouting pipe, so that the tunnel face is easy to be unstable, and the ground is easy to collapse due to poor water stopping effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a major diameter mud water balance shield constructs super shallow tunnel portal sealing device that starts that buries is provided to effectively improve leakproofness, stagnant water effect and security.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a major diameter slurry balance shield constructs super shallow tunnel portal sealing device that starts that buries, include with well major structure side wall fixed connection's pre-buried tunnel portal steel loop, characterized by of starting: the middle fixing ring plate is fixedly arranged on the inner ring wall of the pre-buried portal steel ring, mounting holes are formed in the outer end ring of the pre-buried portal steel ring and the middle fixing ring plate at intervals in the circumferential direction, long bolts penetrate through the mounting holes in the outer side fixing ring plate and the folding pressing plate to fixedly mount the outer side curtain cloth rubber on the outer end ring plate of the pre-buried portal steel ring, and short bolts penetrate through the mounting holes in the middle fixing ring plate to fixedly mount the middle curtain cloth rubber on the middle fixing ring plate; when the shield cutter head enters the pre-buried portal steel ring, a first seal and a second seal are respectively formed with the outer curtain cloth rubber and the middle curtain cloth rubber; and the upper part of the pre-buried portal steel ring is provided with grouting pipes which are communicated with a cavity between the outer side cord fabric rubber and the middle cord fabric rubber at intervals along the circumferential direction.
The beneficial effects of the utility model are that, axial interval sets up outside curtain cloth rubber on pre-buried portal steel ring outer end crown plate and the interior rampart, middle curtain cloth rubber, it is sealed that the shield constructs the blade disc and successively forms the twice when entering, after the shield constructs the blade disc and gets into the sealed back of second way, the accessible slip casting pipe, to the bentonite mud of the cavity pressure injection shield tail grease or viscosity about 120S between twice sealing device, and it is slightly higher than shield excavation storehouse muddy water pressure to continuously keep filler pressure, prevent that the excavation storehouse thick liquid from overflowing through curtain cloth rubber, the seal is strong, the stagnant water effect, can effectively stagnant water and guarantee that the face is stable, can effectively improve the security that major diameter muddy water balance shield surpasss the shield and shallowly buries and initiate.
Drawings
The specification includes the following nine figures:
FIG. 1 is a front view of the ultra-shallow buried starting tunnel portal sealing device of the large-diameter slurry balance shield of the present invention;
FIG. 2 is a side view of the ultra-shallow buried starting tunnel portal sealing device of the large-diameter slurry balance shield of the present invention;
FIG. 3 is a partial view of the ultra-shallow tunnel portal sealing device of the large-diameter slurry balance shield of the present invention;
FIG. 4 is a detailed view of a folding pressing plate of the sealing device for the ultra-shallow buried starting tunnel portal of the large-diameter slurry balance shield of the utility model;
FIG. 5 is a front view of a middle pressing plate of the ultra-shallow tunnel starting door sealing device of the large-diameter slurry balance shield of the present invention;
FIG. 6 is a front view of a fixing plate in the sealing device of the originating tunnel portal buried in ultra-shallow depth for the large-diameter slurry balance shield of the present invention;
fig. 7, fig. 8 and fig. 9 are schematic diagrams respectively before, during and after the shield of the ultra-shallow buried starting tunnel portal sealing device for the large-diameter slurry balance shield of the present invention passes through.
The figures show the components and corresponding references: the device comprises an embedded portal steel ring 10, an embedded portal steel ring upper block 11, an embedded portal steel ring left block 12, an embedded portal steel ring lower block 13, an embedded portal steel ring right block 14, a folding pressing plate 20, a fixing plate 21, a pressing plate 22, a rotating shaft 23, outer side cord fabric rubber 31, middle cord fabric rubber 32, a section steel support 40, an outer side fixing ring plate 51, a long bolt 52, a middle fixing ring plate 53, a short bolt 54, a grouting pipe 60 9 and a cavity A.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1 and 3, the utility model discloses a major diameter mud water balance shield constructs super shallow buries and starts portal sealing device, include with well major structure side wall fixed connection's pre-buried portal steel ring 10 that starts. The middle fixing ring plate 53 is fixedly arranged on the inner ring wall of the embedded portal steel ring 10, mounting holes are formed in the outer end ring plate of the embedded portal steel ring 10 and the middle fixing ring plate 53 at intervals in the circumferential direction, the long bolts 52 penetrate through the mounting holes in the outer side fixing ring plate 51 and the folding pressing plate 20 to fixedly mount the outer side curtain cloth rubber 31 on the outer end ring plate of the embedded portal steel ring 10, and the short bolts 54 penetrate through the mounting holes in the middle fixing ring plate 53 to fixedly mount the middle curtain cloth rubber 32 on the middle fixing ring plate 53. When the shield cutter head enters the pre-buried tunnel portal steel ring 10, a first seal and a second seal are respectively formed with the outer curtain cloth rubber 31 and the middle curtain cloth rubber 32. And grouting pipes 60 leading to a cavity A between the outer curtain cloth rubber 31 and the middle curtain cloth rubber 32 are arranged at intervals along the circumferential direction at the upper part of the embedded portal steel ring 10.
Referring to fig. 1 and 7 to 9, two seals are formed in sequence when the shield cutter head enters the pre-buried portal steel ring 10, after the shield cutter head enters the second seal, shield tail grease or bentonite slurry with the viscosity of about 120S is injected into a cavity A between the two sealing devices through a grouting pipe 60, the pressure of a filler is kept slightly higher than the slurry pressure of an excavation cabin of the shield continuously, the slurry of the excavation cabin is prevented from overflowing through cord fabric rubber, the tightness is high, the water stopping effect is achieved, water can be effectively stopped, the stability of a tunnel face is guaranteed, and the safety of ultra-shallow burying starting of the large-diameter slurry balance shield can be effectively improved.
Referring to fig. 2, the pre-buried portal steel ring 10 is formed by annularly splicing an upper pre-buried portal steel ring block 11, a left pre-buried portal steel ring block 12, a lower pre-buried portal steel ring block 13 and a right pre-buried portal steel ring block 14 which are pre-buried along with the horizontal section of the side wall of the main body structure. The inside double-deck shaped steel that is equipped with of pre-buried portal steel ring 10 supports 40, and shaped steel supports 40 adopts the segmentation design, through bolted connection, ensures that pre-buried portal steel ring 10 is indeformable at pre-buried in-process. After the pre-burying of the pre-buried portal steel rings 10 is finished, the section steel supports 40 are removed before the outer cord fabric rubber 31 and the middle cord fabric rubber 32 are installed.
Generally, 7 grouting pipes 60 are uniformly arranged in the range of 270 degrees above the pre-buried portal steel ring 10.
Referring to fig. 4 to 6, the folding pressing plate 20 includes a fixed plate 21 and a pressing plate 22 hinged to each other by a rotating shaft 23, and the pressing plate 22 can be rotated at a certain angle with respect to the fixed plate 21. Referring to fig. 3, the outer curtain rubber 31 is fixedly mounted on the outer end ring plate of the embedded portal steel ring 10 by the fixing plate 21 and the outer fixing ring plate 51 through the long bolt 52.
The above description is only used for illustrating the principles of the ultra-shallow tunnel door sealing device of the present invention, which is not intended to limit the present invention to the specific structure and application range shown and described, so that all the corresponding modifications and equivalents that may be utilized all belong to the claims of the present invention.
Claims (4)
1. Major diameter slurry balance shield constructs super shallow buries and starts portal sealing device includes pre-buried portal steel ring (10) with well major structure side wall fixed connection that starts, characterized by: the inner ring wall of the pre-buried portal steel ring (10) is fixedly provided with a middle fixing ring plate (53), the outer end ring plate of the pre-buried portal steel ring (10) and the middle fixing ring plate (53) are provided with mounting holes at intervals in the circumferential direction, long bolts (52) penetrate through the mounting holes in the outer side fixing ring plate (51) and the folding pressing plate (20) to fixedly mount the outer side curtain cloth rubber (31) on the outer end ring plate of the pre-buried portal steel ring (10), and short bolts (54) penetrate through the mounting holes in the middle fixing ring plate (53) to fixedly mount the middle curtain cloth rubber (32) on the middle fixing ring plate (53); when the shield cutter head enters the pre-buried tunnel portal steel ring (10), a first seal and a second seal are respectively formed with the outer curtain cloth rubber (31) and the middle curtain cloth rubber (32); and grouting pipes (60) leading to a cavity (A) between the outer curtain cloth rubber (31) and the middle curtain cloth rubber (32) are arranged at the upper part of the embedded portal steel ring (10) at intervals along the annular direction.
2. The sealing device for the ultra-shallow buried starting tunnel portal of the large-diameter slurry balance shield as claimed in claim 1, which is characterized in that: 7 grouting pipes (60) are uniformly arranged in the range of 270 degrees of the upper part of the pre-buried portal steel ring (10).
3. The sealing device for the ultra-shallow buried starting tunnel portal of the large-diameter slurry balance shield as claimed in claim 1, which is characterized in that: the embedded portal steel ring (10) is formed by annularly splicing an embedded portal steel ring upper block (11), an embedded portal steel ring left block (12), an embedded portal steel ring lower block (13) and an embedded portal steel ring right block (14) which are embedded along with the horizontal segmentation of the side wall of the main body structure.
4. The sealing device for the ultra-shallow buried starting tunnel portal of the large-diameter slurry balance shield as claimed in claim 1, which is characterized in that: the folding pressing plate (20) is composed of a fixed plate (21) and a pressing plate (22) which are hinged through a rotating shaft (23), and the fixed plate (21) and the outer side fixing ring plate (51) are used for fixedly installing the outer side curtain cloth rubber (31) on the outer end ring plate of the embedded portal steel ring (10) through a long bolt (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040101.1U CN217652729U (en) | 2022-01-07 | 2022-01-07 | Large-diameter slurry balance shield ultra-shallow buried starting tunnel portal sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040101.1U CN217652729U (en) | 2022-01-07 | 2022-01-07 | Large-diameter slurry balance shield ultra-shallow buried starting tunnel portal sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217652729U true CN217652729U (en) | 2022-10-25 |
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ID=83660791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220040101.1U Active CN217652729U (en) | 2022-01-07 | 2022-01-07 | Large-diameter slurry balance shield ultra-shallow buried starting tunnel portal sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217652729U (en) |
-
2022
- 2022-01-07 CN CN202220040101.1U patent/CN217652729U/en active Active
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