CN116892398B - Slurry balance and double-shield double-mode shield machine - Google Patents
Slurry balance and double-shield double-mode shield machine Download PDFInfo
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- CN116892398B CN116892398B CN202311053561.3A CN202311053561A CN116892398B CN 116892398 B CN116892398 B CN 116892398B CN 202311053561 A CN202311053561 A CN 202311053561A CN 116892398 B CN116892398 B CN 116892398B
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- 239000002002 slurry Substances 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 223
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 238000005192 partition Methods 0.000 claims abstract description 39
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 10
- 230000009977 dual effect Effects 0.000 claims description 23
- 230000013011 mating Effects 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 2
- 230000005641 tunneling Effects 0.000 abstract description 36
- 238000010276 construction Methods 0.000 abstract description 17
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 16
- 239000002893 slag Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004181 pedogenesis Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application discloses a slurry balance and double-shield double-mode shield machine, which comprises: front shield, flexible shield, center moving platform and prop tight shield. The mud-water balance and double-shield double-mode shield machine is provided with a double-shield mode and a mud-water balance mode, in the double-shield mode, the supporting shoe mechanism stretches out and supports the supporting plate on the rock, the moving mechanism drives the sealing partition plate to move to the first position, in the mud-water balance mode, the supporting shoe mechanism retracts the supporting plate to the opening to seal the opening, and the moving mechanism drives the sealing partition plate to move to the second position. The dual-mode shield machine provided by the application has a muddy water balance mode and a dual-shield mode, is suitable for tunneling construction in a complex underground environment, can be used for constructing a soft and loose soil layer with high water content and also can be used for constructing a soft rock stratum, a hard rock stratum and an extremely hard rock stratum, so that the geological adaptability and the construction efficiency of the shield machine are obviously improved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of shield machines, in particular to a slurry balance and double-shield double-mode shield machine.
Background
Full face tunnel boring machines generally include rock boring machines for rock formations and shield machines for soft soil formations. The existing rock tunneling machine and the existing shield tunneling machine are of various different types, the rock tunneling machine comprises an open type, a single shield, a double shield and the like, the shield tunneling machine comprises a cutting type, a pneumatic type, a soil pressure balance type, a slurry balance type and the like, and the principles of the shield tunneling machines of different types are not completely the same, so that the shield tunneling machine is suitable for different stratum structures. The rock tunneling machine and the shield tunneling machine are collectively called a shield tunneling machine in foreign countries, and the invention is also collectively called a shield tunneling machine or a tunneling machine.
Double shield heading machines are commonly used for long distance mountain tunnel tunneling. The double-shield tunneling machine is of a semi-open type, two arc supporting plates are arranged between a front shield and a rear shield, the oil cylinders stretch out and draw back, the function of the double-shield tunneling machine is to push out a rear support to the rock layer after excavation to provide counter force for cutter head excavation and front shield pushing, the front shield continues pushing through the oil cylinders stretch out and draw back of the telescopic shield, the rear shield is motionless, and annular assembly of prefabricated segments is synchronously completed in the rear shield. The main design concept is that the propelling and the assembling are synchronously carried out. The reaction force of the thrust is provided by the friction force generated by the middle radial oil cylinder support. The space formed by the cutterhead of the double-shield tunneling machine and the inner cavity of the front shield is a muck bin, and a belt conveyor or other slag discharging equipment stretches into the muck bin to convey muck formed by cutting a tunneling surface rock stratum by the cutterhead to the ground. The double-shield tunneling machine has higher construction efficiency, but is not suitable for urban subway construction with most clay or sand layers due to long equipment and incomplete sealing.
The slurry balance type shield machine is characterized in that a sealing baffle plate is arranged at the rear side of a cutterhead of a mechanical shield, and a space among the sealing baffle plate, an inner cavity of a front shield and the cutterhead is a slurry bin. The muddy water prepared by mixing water, clay and additives is pressed into a muddy water bin through a conveying pipeline, and a muddy water pressure chamber is formed when the muddy water fills the whole muddy water bin and has a certain pressure. The stability of the excavation working face can be maintained by the pressurizing action of the muddy water and the pressure maintaining mechanism. During the shield pushing, the soil and sand cut off by the rotary cutter disc are stirred by the stirring device to form high-concentration muddy water, the high-concentration muddy water is sent to the ground muddy water separation system in a fluid conveying mode, and the muddy water is returned to the muddy water bin after the separation of the ballasted soil and the water, so that the main characteristic of the muddy water pressurization balance shield method is that the muddy water pressurization balance shield method is realized. Because the slurry pressure enables the digging surface to be balanced stably, the slurry pressurized balance shield machine, namely the slurry balance shield machine for short, can stabilize the digging surface in the stratum where the quicksand easily occurs, can be used for construction operation under normal atmospheric pressure, is suitable for the stratum such as soft silt clay layer, loose sand layer, gravel layer, pebble layer, hard soil and the like, and is particularly suitable for the stratum with high water content, the river crossing tunnel with water above and the submarine tunnel. The slurry balance shield machine can more accurately maintain the stability of the tunneling surface, but because the tunneling thrust comes from the counter force of the auxiliary oil cylinder pushing the segment, the pushing and the assembling cannot be synchronously carried out, and the construction efficiency is lower.
In order to improve the geological adaptability of the shield machine, the construction efficiency is high, the construction cost is reduced, dual-mode or multi-mode shield machines for integrating different types of shield machines are generated in recent years, but the interior of the slurry balance type shield machine needs to be sealed by pressure, the dual-shield type shield machine is of an open type or semi-open type structure, structural contradiction exists between the dual-shield type shield machine and the dual-shield type shield machine, and the slurry balance and the dual-shield type shield machine are difficult to integrate into the same shield machine.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a slurry balance and double-shield double-mode shield machine.
The application provides the following technical scheme:
a slurry balance and dual shield dual mode shield machine comprising:
A front shield having a front shield cartridge housing;
the telescopic shield is provided with a telescopic cylinder shell, the front shield cylinder shell is slidably sleeved on the telescopic cylinder shell, one of the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell is provided with a first sealing piece, and the first sealing piece is used for tightly sealing a gap between the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell.
The center moving platform is positioned on the inner sides of the front shield and the telescopic shield, the center moving platform comprises a center moving platform sealing shell and a sealing partition plate, the center moving platform sealing shell is connected to the front shield through a moving mechanism, the sealing partition plate is arranged at one end of the center moving platform sealing shell, the moving mechanism moves in a telescopic mode and can drive the sealing partition plate to move to a first position or a second position, the first position is close to a cutter disc, the second position is close to the telescopic shield, an unsealed residue soil bin is formed between an inner cavity of the front shield and the cutter disc arranged on the front shield in the state that the sealing partition plate integrally moves to the second position in the direction of propping up the front shield, and a sealed mud water bin is formed between the sealing partition plate, the inner cavity of the front shield and the cutter disc arranged on the front shield in a mud water balance mode;
The tightening shield is connected to the telescopic shield, the tightening shield is provided with a tightening cylinder shell and a tightening shoe mechanism, the tightening cylinder shell is provided with an opening, the tightening shoe mechanism comprises a supporting plate, and the supporting plate is extended or retracted into the opening by the tightening shoe mechanism;
The mud-water balance and double-shield double-mode shield machine is provided with a double-shield mode and a mud-water balance mode, in the double-shield mode, the supporting shoe mechanism stretches out and supports the supporting plate on rock, the moving mechanism drives the sealing partition plate to move to a first position, in the mud-water balance mode, the supporting shoe mechanism retracts the supporting plate to the opening so as to seal the opening, and the moving mechanism drives the sealing partition plate to move to a second position.
Optionally, a second sealing matching ring is convexly arranged on the inner wall of the front shield cylinder shell;
The end part of the telescopic cylinder shell is provided with a second sealing fit flanging;
one of the second seal mating ring and the second seal mating flange is provided with a second seal;
Under muddy water balance mode, the flexible shield is retracted in place, in the state that flexible shell stretches into preceding shield shell reaches extreme position, the second sealing member is used for compressing tightly sealed the clearance of second sealed cooperation turn-ups with the second sealed cooperation ring.
Optionally, the slurry balance and dual-shield dual-mode shield machine comprises a fastener;
under muddy water balance mode, flexible shield is retracted in place, the fastener runs through second sealed cooperation turn-ups with the setting of second sealed cooperation ring, will second sealed cooperation turn-ups with the connection of second sealed cooperation ring is fixed.
Optionally, the front shield has a third sealed mating shell in communication with the interior cavity;
one of the center moving platform seal housing and the third seal mating housing is provided with a third seal;
the third sealing piece is arranged along the circumference of the inner wall of the third sealing matching shell or the circumference of the outer wall of the sealing shell of the center moving platform in an extending way;
one end of the fixing piece penetrates through the third sealing piece, and the third sealing piece is fixedly connected with the center moving platform sealing shell or the third sealing matching shell;
The third sealing piece is used for sealing a gap between the center moving platform sealing shell and the third sealing matching shell;
optionally, a fourth sealing flanging is arranged on the outer wall of the third sealing matching shell of the front shield;
One of the sealing baffle edge and the fourth sealing flange is provided with a fourth sealing piece;
in a muddy water balance mode, the center moving platform integrally moves to a limiting position (a second position) in the direction of the tightening shield, the fourth sealing piece seals the gap between the sealing partition plate and the fourth sealing flanging, and a muddy water bin is formed by the sealing partition plate, the inner cavity of the front shield and a space between the cutter head.
Optionally, a fifth sealing element is arranged on at least one of the inner wall of the opening of the tightening cylinder shell and the peripheral side edge of the supporting plate;
In the muddy water balance mode, the fifth sealing member seals a gap between the stay plate and the tightening cylinder housing in a state where the stay plate is retracted to the opening.
Optionally, the fifth sealing element extends along the circumference of the inner wall of the opening or the circumference of the supporting plate;
one end of the fixing piece penetrates through the fifth sealing piece, and the fifth sealing piece is fixedly connected to the inner wall of the opening of the tightening cylinder shell or the periphery side edge of the supporting plate;
The fifth seal is compressively disposed between the stay and the opening inner wall in a state where the stay is retracted to the opening.
Optionally, a sixth sealing matching ring is arranged inside the tightening cylinder shell;
The inner side edge of the sixth sealing fit ring extends towards the central axis of the opening;
In the muddy water balance mode, the stay plate and the sixth seal engagement ring are in seal engagement in a state where the stay plate is retracted to the opening.
Optionally, the surface of the supporting plate, which is close to the inner side of the supporting cylinder shell, is provided with the annular sixth sealing piece;
In the slurry balance mode, the stay plate is retracted to the opening, and the sixth sealing member compresses and seals the gap between the stay plate and the sixth sealing engagement ring.
Optionally, the slurry balance and dual-shield dual-mode shield machine further comprises an air bag member;
The air bag piece is arranged on the surface of the tightening cylinder shell, and the air bag piece is arranged around the edge of the opening, or the air bag piece is arranged on the supporting plate, and the air bag piece is arranged around the edge of the supporting plate;
in the muddy water balance mode, in a state that the supporting plate is retracted to the opening, the air bag piece covers and tightly seals a gap between the supporting plate and the tightening cylinder shell.
By adopting the technical scheme, the invention has the following beneficial effects:
The dual-mode shield machine provided by the application has a muddy water balance mode and a dual-shield mode, is suitable for tunneling construction in a complex underground environment, can be used for construction in a soft and loose soil layer with high water content, and also can be used for construction in soft rock, hard rock and extremely hard rock strata, and the geological adaptability and the construction efficiency of the shield machine are obviously improved.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a cross-sectional view of a slurry balance and dual shield dual mode shield machine (dual shield mode) provided by an embodiment of the present application;
FIG. 2 is a cross-sectional view of a slurry balance and dual-shield dual-mode shield machine (slurry balance mode) provided by an embodiment of the application;
FIG. 3 shows a seal fit structure of a front shield shell and a telescopic shell in a slurry balance and dual-shield dual-mode shield machine provided by an embodiment of the application;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic diagram of a matching structure of a third sealing matching shell, a center moving platform sealing shell and a sealing partition plate of a front shield in a slurry balance and dual-shield dual-mode shield machine provided by the embodiment of the application;
FIG. 6 is an enlarged view of portion D of FIG. 5;
FIG. 7 is an enlarged view of portion E of FIG. 5;
FIG. 8 is a schematic diagram of a matched structure of a tightening cylinder shell and a shoe supporting mechanism in the slurry balance and dual-shield dual-mode shield machine provided by the embodiment of the application;
FIG. 9 is an enlarged view of portion B of FIG. 8;
FIG. 10 is an enlarged view of portion C of FIG. 8;
FIG. 11 is a schematic structural view of an airbag on a supporting plate in a slurry balance and dual-shield dual-mode shield machine provided by the embodiment of the application.
In the figure, 1, a front shield; 11. a front shield shell; 12. a second seal mating ring; 13. a third seal mating shell; 131. fourth sealing flanging; 2. a telescopic shield; 21. a telescoping cartridge housing; 22. the second seal is matched with the flanging; 3. tightly supporting the shield; 31. tightening the cylinder shell; 311. a sixth seal mating ring; 32. a shoe supporting mechanism; 321. a supporting plate; 4. a center moving platform; 41. a closing partition; 42. a center mobile platform seal housing; 43. a moving mechanism; a. a first seal; b. a second seal; c. a third seal; d. a fourth seal; e. a fifth seal; f. a sixth seal; g. a fastener; h. an air bag member.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 11, an embodiment of the present application provides a slurry balance and dual-shield dual-mode shield tunneling machine, including: front shield 1, flexible shield 2, prop up tight shield 3 and center mobile platform 4. The front shield 1 is provided with a front shield shell 11, the telescopic shield 2 is provided with a telescopic shell 21, and the front shield shell 11 is slidably sleeved on the telescopic shell 21. One of the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell is provided with a first sealing piece a, and the first sealing piece a is used for tightly sealing a gap between the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell. The center moving platform 4 is located inside the front shield 1 and the telescopic shield 2, the center moving platform comprises a center moving platform sealing shell 43 and a sealing partition 41, the center moving platform sealing shell 43 is connected to the front shield 1 through a moving mechanism, the sealing partition 41 is arranged at one end of the center moving platform sealing shell 42, and the moving mechanism can move in a telescopic mode to drive the sealing partition 41 to move to a second position (shown in fig. 2) or a first position (shown in fig. 1). In a state that the sealing partition plate 41 moves to the second position, a sealing mud water bin is formed among the sealing partition plate 41, the inner cavity of the front shield 1 and the cutter head arranged on the front shield 1; in a state that the sealing partition plate 41 moves to the first position, a sealed slag water bin is formed among the sealing partition plate 41, the inner cavity of the front shield 1 and the cutter head arranged on the front shield 1. The tightening shield 3 is connected to the telescopic shield 2, the tightening shield 3 is provided with a tightening cylinder shell 31 and a tightening shoe mechanism 32, the tightening cylinder shell 31 is provided with an opening, the tightening shoe mechanism 32 comprises a supporting plate 321, and the tightening shoe mechanism 32 extends or retracts the supporting plate 321 into the opening.
The mud-water balance and double-shield double-mode shield machine has a double-shield mode in which the shoe supporting mechanism 32 extends and supports the supporting plate 321 on rock, the moving mechanism drives the sealing partition 41 to move to a first position, and a mud-water balance mode in which the shoe supporting mechanism 32 retracts the supporting plate 321 to the opening to seal the opening, and the moving mechanism drives the sealing partition 41 to move to a second position.
The dual-mode shield machine provided by the application has a muddy water balance mode and a dual-shield mode, is suitable for tunneling construction in a complex underground environment, can be used for construction in soft and loose soil layers, and also can be used for construction in soft rock, hard rock and extremely hard rock strata, and the construction efficiency is obviously improved. In the double-shield mode, the oil cylinder of the shoe supporting mechanism 32 stretches out the supporting plate 321 of the tight supporting shield 3 and then pushes the supporting plate on the excavated rock layer, so that the front shield continues to be pushed by the oil cylinder of the telescopic shield 2, the rear shield is not moved, and the annular assembly of the prefabricated pipe piece is synchronously completed in the rear shield; during a mud water balance mode, the telescopic shield 2 and the supporting plate 321 of the supporting shield 3 retract to the right position, the center moving platform 4 moves to the right position along the direction of the supporting shield 3, a mud water bin is formed in the space between the sealing partition plate 41 of the center moving platform 4, the inner cavity of the front shield 1 and the cutterhead, the mud water center swivel joint is removed, the mud water center swivel joint is installed again, and a mud door in the air cushion bin is opened to fill mud.
Under the muddy water balance mode, flexible shield 2 with shield 1 is close in opposite directions, first sealing member a seals the gap between the inner wall of shield shell 11 and the outer wall of flexible shell 21 for shield constructs the inside sealed cavity that forms of machine, satisfies under the muddy water balance mode, and the operation demand of shield constructs the machine. The first sealing member a may be a sealing ring, and is sleeved on the outer wall of the telescopic cylinder shell of the telescopic shield 2 or the inner wall of the front shield cylinder shell 11. The shield tunneling machine may include a plurality of first sealing elements a, each of the first sealing elements a may be sequentially disposed at intervals along the length direction of the telescopic shield 2, each of the first sealing elements a may be disposed in parallel, and each of the first sealing elements a may have the same diameter. In the muddy water balance mode, the first seal member a is arranged between the front shield casing 11 and the telescopic casing 21 in a compressed manner, and closes a gap therebetween.
In this embodiment, as shown in fig. 3, the inner wall of the front shield shell 11 is convexly provided with the second sealing engagement ring 12, the outer ring of the second sealing engagement ring 12 is connected to the inner wall of the front shield shell 11, and the inner ring of the second sealing engagement ring 12 extends laterally to the axis of the front shield shell 11. The end of the telescopic cylinder shell 21 is provided with the second sealing matching flange 22, one of the second sealing matching ring 12 and the second sealing matching flange 22 is provided with the second sealing element b, and the second sealing element b seals the gap between the second sealing matching flange 22 and the second sealing matching ring 12 when the telescopic cylinder shell 21 stretches into the front shield cylinder shell 11 to the limit position. The second seal b may be a sealing ring, and is disposed on a surface of the second seal mating ring 12 or the second seal mating flange 22. The shield tunneling machine may include a plurality of second sealing elements b, each of the second sealing elements b being sequentially spaced apart in a radial direction of the second seal mating ring 12, each of the second sealing elements b having a different diameter, each of the second sealing elements b being concentrically disposed. In the muddy water balance mode, the telescopic cylinder housing 21 moves towards the inner side of the front shield cylinder housing 11 until the second sealing engagement flange 22 and the second sealing engagement ring 12 are in contact, and the second sealing member b is elastically and compressively arranged between the second sealing engagement ring 12 and the second sealing engagement flange 22 to close a gap therebetween.
In this embodiment, the second sealing member b is further arranged on the basis of the first sealing member a, and the design of two different sealing structures significantly improves the sealing effect between the front shield cylinder shell 11 and the telescopic cylinder shell 21.
In this embodiment, referring to fig. 3, the slurry balance and dual-shield dual-mode shield machine includes a fastener g, where the fastener g penetrates through the second seal fit flange 22 and the second seal fit ring 12, and connects and fixes the second seal fit flange 22 and the second seal fit ring 12. So that the shield machine is stable in state in the muddy water balance mode, and the front shield cylinder shell 11 and the telescopic cylinder shell 21 cannot move relatively.
In one possible embodiment, referring to fig. 4 and 5, the slurry balance and dual shield dual mode shield machine further comprises the front shield 1 and the center movable platform shield 4, wherein the front shield 1 is provided with a third sealing cooperation shell 13 communicated with the inner cavity, and the center movable platform 4 is provided with the sealing partition 41 and a center movable platform sealing shell 42. One of the center mobile platform seal housing and the third seal mating housing is provided with a third seal. In the muddy water balance mode, the third sealing member c is used for sealing a gap between the sealing shell 42 of the center moving platform and the third sealing matching shell 13 in a state that the center moving platform 4 extends into the inner cavity of the front shield 1. The third sealing member c may be a sealing ring, and extends along a circumference of the outer edge of the third sealing mating shell 13 or along a circumference of the outer edge of the center moving platform sealing shell 42, so as to close a gap therebetween. One end of the fixing member passes through the third sealing member c to connect and fix the third sealing member c to the center moving platform seal housing 42 or the third seal mating housing 13. The outer side surface of the third sealing element c can be provided with a concave part, so that the cap body of the fixing element can be conveniently accommodated, and the cap body of the fixing element does not protrude out of the outer side surface of the third sealing element c. The inner side surface of the third sealing member c directly contacts with the surface of the center moving platform seal housing 42 or the third seal mating housing 13. The shield tunneling machine may include a plurality of third sealing members c, each of the third sealing members c being sequentially spaced apart along a length direction of the center moving platform seal housing 42, each of the third sealing members c being disposed in parallel, each of the third sealing members c having a same diameter. One or more wetting blocks may be provided on both sides of the third sealing member c to reduce surface friction between the center moving platform seal housing 42 and the third seal mating housing 13 and to enhance the sealing effect of the third sealing member c.
In this embodiment, as shown in fig. 4 and 6, the outer wall of the third sealing engagement shell of the front shield 1 is provided with a fourth sealing flange 131, and one of the edge of the closing partition 41 and the fourth sealing flange 131 is provided with a fourth sealing member d. In the muddy water balance mode, the center moving platform 4 moves towards the direction of the tightening shield 3 until the outer side of the sealing partition 41 is contacted with the fourth sealing flange 131, the fourth sealing piece d seals the gap between the sealing partition 41 and the fourth sealing flange 131, and a muddy water bin is formed in the space between the sealing partition 41, the inner cavity of the front shield 1 and the cutterhead. The fourth sealing member d may be a sealing ring, and extends along a circumference of the outer edge of the sealing partition 41 or along a circumference of the outer edge of the fourth sealing flange 131, so as to seal a gap therebetween. The shield tunneling machine may include a plurality of fourth sealing members d, each of the fourth sealing members d being disposed at intervals in the radial direction of the closing partition 41, each of the fourth sealing members d having a different diameter, each of the fourth sealing members d being disposed concentrically.
In this embodiment, on the basis of the third sealing member c, the fourth sealing member d is further provided, and the design of two different sealing structures obviously improves the sealing effect of the mud water bin.
In one possible embodiment, referring to fig. 7 to 10, the slurry balance and dual shield dual mode shield machine includes a tightening shield 3, the tightening shield 3 being connected to the telescoping shield 2. The tightening shield 3 comprises the tightening cylinder shell 31 and the tightening shoe mechanism 32. The tightening cylinder 31 has an opening, and the shoe mechanism 32 includes the stay 321, and the shoe mechanism can extend or retract the stay 321 into or out of the opening. In the slurry balance mode, the shoe mechanism can retract the stay plate 321 into the opening. At least one of the opening inner wall and the stay 321 peripheral side edge is provided with the fifth seal e. In a state where the stay 321 is retracted to the opening, the fifth seal e closes the gap between the stay 321 and the tightening cylinder 31.
In this embodiment, the fifth sealing member e may be a sealing ring, and is fixed to the inner wall of the opening of the tightening cylinder 31 or the peripheral edge of the stay 321. The shield tunneling machine may include a plurality of the fifth sealing members e, each of the fifth sealing members e being sequentially disposed along the moving direction of the stay plate 321. In the mud water balance mode, the shoe supporting mechanism 32 is retracted, and the supporting plate 321 is driven to retract to the opening. The fifth sealing member e is disposed between the edge of the supporting plate 321 and the inner wall of the opening of the tightening cylinder 31 in a compressed manner, and seals the gap therebetween.
In this embodiment, the fifth sealing element e is disposed along the periphery of the inner wall of the opening or the periphery of the supporting plate 321, and one end of the fixing element is connected to the inner wall of the opening of the tightening cylinder 31 or the periphery of the supporting plate 321 through the fifth sealing element e. In a state where the stay 321 is retracted to the opening, the fifth seal e is compressively disposed between the stay 321 and the opening inner wall.
In this embodiment, the fifth sealing member e may be fixed to the opening inner wall of the tightening cylinder case 31 or the circumferential side edge of the stay 321 by a fixing member. A plurality of fixing members are connected at their uniform ends to the inner wall of the opening of the tightening cylinder case 31 or to the peripheral side edge of the stay 321 through the fifth sealing member e. The cap body at the other end of the fixing piece is limited on the fifth sealing piece e. The outer side surface of the fifth sealing element e can be provided with a concave part, so that the cap body of the fixing element can be conveniently accommodated, and the cap body of the fixing element does not protrude out of the outer side surface of the fifth sealing element e. The inner side surface of the fifth sealing element e is directly contacted with the surface of the supporting plate 321 or the supporting cylinder shell 31. The shield tunneling machine may include a plurality of fifth sealing elements e, each of the fifth sealing elements e is sequentially disposed at intervals along the length direction of the inner wall of the opening of the tightening cylinder shell 31, each of the fifth sealing elements e is disposed in parallel, and each of the third sealing elements c has the same diameter. One or more wetting blocks may be disposed on both sides of the fifth sealing member to reduce surface friction between the inner wall of the opening of the tightening cylinder housing 31 or the peripheral edge of the bracing plate 321 and to enhance the sealing effect of the fifth sealing member.
In this embodiment, as shown in fig. 9, the sixth seal engaging ring 311 is disposed inside the tightening cylinder case 31, the inner circumferential edge of the sixth seal engaging ring 311 extends toward the central axis of the opening, and the stay plate 321 and the sixth seal engaging ring 311 are in seal engagement in a state where the stay plate 321 is retracted to the opening.
In this embodiment, the sixth sealing member f is provided in a ring shape on a surface of the stay 321 adjacent to the inner side of the tightening cylinder case 31, and seals a gap between the stay 321 and the sixth seal engagement ring 311 in a state where the stay 321 is retracted to the opening.
In this embodiment, the sixth sealing member f may be a sealing ring, and is disposed at an edge of the stay 321. The shield tunneling machine may include a plurality of sixth sealing members f, each of the sixth sealing members f may be sequentially disposed at intervals along a radial direction of the sixth sealing mating ring 311, each of the sixth sealing members f may have a different diameter, and each of the sixth sealing members f may be disposed concentrically. In the muddy water balance mode, the stay plate 321 is retracted to the opening, and the sixth seal f is compressively disposed between the sixth seal engagement ring 311 and the stay plate 321, closing a gap therebetween.
In this embodiment, referring to fig. 10, the slurry balance and dual-shield dual-mode shield machine further includes the air bag member h. The air bag member h is arranged on the surface of the tightening cylinder shell 31, and surrounds the opening edge for one circle, or the air bag member h is arranged on the supporting plate 321, and surrounds the supporting plate 321 for one circle. In a state where the stay plate 321 is retracted to the opening, the air bag member h covers the gap between the stay plate 321 and the tightening cylinder case 31, further improving the sealing effect between the tightening cylinder case 31 and the stay plate 321.
In this embodiment, the design of the third sealing structure, on the basis of the fifth sealing element e, further provides the sixth sealing element f and the air bag element h, and the sealing effect between the tightening cylinder shell 31 and the supporting plate 321 is significantly improved.
The muddy water balance and double-shield double-mode shield tunneling machine provided by the embodiment of the application can start tunneling in any mode, and can be converted into a second mode before entering different stratum. Taking a double-shield mode to convert to a mud-water balance mode as an example, and continuously tunneling to slowly retract the telescopic shield 2 into position before reaching a designated conversion position; after the telescopic shield 2 is retracted in place, the telescopic shield 2 is connected and fastened by the fastening piece g (such as a bolt), and the sealing and hinged sealing states of the telescopic shield 2 are checked; the shoe supporting mechanism 32 retracts the supporting plates 321 at two sides into position, ensures that the position seal of the supporting plates 321 is in a compression state, and sets mechanical limit of the left shoe supporting mechanism and the right shoe supporting mechanism to prevent the supporting plates 321 from extending outwards; dismantling a double-shield center swivel joint, and dismantling a belt conveyor or other slag discharging equipment; after the center moving platform 4 is integrally moved to the direction of the tightening shield 3 by utilizing an oil cylinder, removing a slag chute and a scraping plate at the back of the cutterhead to form a mud water bin, and installing a mud water center rotary joint; opening a mud door in the air cushion cabin, connecting a mud hose at the 4 position of the center movable platform, checking the positions of ball valves and interfaces of the air cushion cabin and the shell, ensuring that the sealing meets the requirements, checking the states of a mud water circulation system and related parts, and ensuring that the functions meet the requirements; and checking other safety matters, gradually starting the mud-water circulation system after the conditions are met, and entering a mud-water balance mode for tunneling. Taking a muddy water balance mode to convert into a double-shield mode as an example, stopping tunneling after reaching a designated conversion position, closing a muddy water circulation system, disconnecting a mud hose at the position of the center moving platform 4, and closing a mud door in an air cushion cabin; removing a muddy water type center rotary joint, installing a cutter head back slag chute and a scraper, integrally moving the center moving platform 4 to the cutter head direction by utilizing an oil cylinder to form a slag soil bin, and installing a double-shield center rotary joint, a belt conveyor or other slag discharging equipment; releasing the mechanical limit of the shoe supporting mechanisms 32 at both sides, wherein the shoe supporting mechanisms 32 extend the supporting plates 321 at both sides out of the tightening cylinder shell 31 and tightly prop against the excavated rock stratum; and removing the fastening piece g between the front shield 1 and the telescopic shield 2, starting the oil cylinder and the cutterhead of the telescopic shield 2, and entering a double-shield mode tunneling.
It should be noted that, in view of the complex structure of the shield machine, the present application mainly describes the structure of the improved part of the shield machine, and the part not described in detail in the present application may be a conventional structure or an existing structure of the shield machine.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any simple modification, equivalent variation and variation of the above embodiments according to the technical matter of the present invention without departing from the scope of the invention.
Claims (10)
1. A slurry balance and dual-shield dual-mode shield machine is characterized by comprising:
A front shield having a front shield cartridge housing;
The telescopic shield is provided with a telescopic cylinder shell, the front shield cylinder shell is slidably sleeved on the telescopic cylinder shell, one of the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell is provided with a first sealing piece, and the first sealing piece is used for tightly sealing a gap between the inner wall of the front shield cylinder shell and the outer wall of the telescopic cylinder shell;
The center moving platform is positioned on the inner sides of the front shield and the telescopic shield, the center moving platform comprises a center moving platform sealing shell and a sealing partition plate, the center moving platform sealing shell is connected to the front shield through a moving mechanism, the sealing partition plate is arranged at one end of the center moving platform sealing shell, the moving mechanism moves in a telescopic mode and can drive the sealing partition plate to move to a first position or a second position, the first position is close to a cutter disc, the second position is close to the telescopic shield, an unsealed residue soil bin is formed between an inner cavity of the front shield and the cutter disc arranged on the front shield in the state that the sealing partition plate integrally moves to the second position in the direction of propping up the front shield, and a sealed mud water bin is formed between the sealing partition plate, the inner cavity of the front shield and the cutter disc arranged on the front shield in a mud water balance mode;
The tightening shield is connected to the telescopic shield, the tightening shield is provided with a tightening cylinder shell and a tightening shoe mechanism, the tightening cylinder shell is provided with an opening, the tightening shoe mechanism comprises a supporting plate, and the supporting plate is extended or retracted into the opening by the tightening shoe mechanism;
The mud-water balance and double-shield double-mode shield machine is provided with a double-shield mode and a mud-water balance mode, in the double-shield mode, the supporting shoe mechanism stretches out and supports the supporting plate on rock, the moving mechanism drives the sealing partition plate to move to a first position, in the mud-water balance mode, the supporting shoe mechanism retracts the supporting plate to the opening so as to seal the opening, and the moving mechanism drives the sealing partition plate to move to a second position.
2. The slurry balance and dual-shield dual-mode shield machine according to claim 1, wherein the inner wall of the front shield cylinder shell is convexly provided with a second sealing matching ring;
The end part of the telescopic cylinder shell is provided with a second sealing fit flanging;
one of the second seal mating ring and the second seal mating flange is provided with a second seal;
Under muddy water balance mode, the flexible shield is retracted in place, in the state that flexible shell stretches into preceding shield shell reaches extreme position, the second sealing member is used for compressing tightly sealed the clearance of second sealed cooperation turn-ups with the second sealed cooperation ring.
3. The slurry balance and dual shield dual mode shield machine of claim 2 comprising a fastener;
under muddy water balance mode, flexible shield is retracted in place, the fastener runs through second sealed cooperation turn-ups with the setting of second sealed cooperation ring, will second sealed cooperation turn-ups with the connection of second sealed cooperation ring is fixed.
4. The slurry balanced and dual shield dual mode shield machine according to claim 3, wherein the front shield has a third sealed mating housing in communication with the interior cavity;
one of the center moving platform seal housing and the third seal mating housing is provided with a third seal;
the third sealing piece is arranged along the circumference of the inner wall of the third sealing matching shell or the circumference of the outer wall of the sealing shell of the center moving platform in an extending way;
one end of the fixing piece penetrates through the third sealing piece, and the third sealing piece is fixedly connected with the center moving platform sealing shell or the third sealing matching shell;
The third seal is used for sealing a gap between the center moving platform seal housing and the third seal matching housing.
5. The slurry balance and dual-shield dual-mode shield machine according to claim 4, wherein a fourth sealing flange is arranged on the outer wall of the third sealing matching shell of the front shield;
One of the sealing baffle edge and the fourth sealing flange is provided with a fourth sealing piece;
In a muddy water balance mode, the center moving platform moves to the tightening shield direction to the limit position, the fourth sealing piece seals the gap between the sealing partition plate and the fourth sealing flanging, and a muddy water bin is formed in the space between the sealing partition plate, the inner cavity of the front shield and the cutter head.
6. The slurry balance and dual shield dual mode shield machine according to claim 5, wherein a fifth seal is provided to at least one of an inner wall of an opening of the tightening cylinder housing and a peripheral edge of the stay plate;
In the muddy water balance mode, the fifth sealing member seals a gap between the stay plate and the tightening cylinder housing in a state where the stay plate is retracted to the opening.
7. The slurry balance and dual shield dual mode shield machine according to claim 6, wherein the fifth seal member extends along a circumference of the inner wall of the opening or a circumference of the side edge of the stay plate;
one end of the fixing piece penetrates through the fifth sealing piece, and the fifth sealing piece is fixedly connected to the inner wall of the opening of the tightening cylinder shell or the periphery side edge of the supporting plate;
The fifth seal is compressively disposed between the stay and the opening inner wall in a state where the stay is retracted to the opening.
8. The slurry balance and dual shield dual mode shield machine of claim 7 wherein a sixth seal mating ring is disposed within said tightening cylinder housing;
The inner side edge of the sixth sealing fit ring extends towards the central axis of the opening;
In the muddy water balance mode, the stay plate and the sixth seal engagement ring are in seal engagement in a state where the stay plate is retracted to the opening.
9. The slurry balance and dual shield dual mode shield machine according to claim 8, wherein a sixth annular seal is disposed on a side of the stay plate adjacent to the inside of the tightening cylinder housing;
In the slurry balance mode, the stay plate is retracted to the opening, and the sixth sealing member compresses and seals the gap between the stay plate and the sixth sealing engagement ring.
10. The slurry balance and dual shield dual mode shield machine of claim 9 further comprising an air bag member;
The air bag piece is arranged on the surface of the tightening cylinder shell, and the air bag piece is arranged around the edge of the opening, or the air bag piece is arranged on the supporting plate, and the air bag piece is arranged around the edge of the supporting plate;
in the muddy water balance mode, in a state that the supporting plate is retracted to the opening, the air bag piece covers and tightly seals a gap between the supporting plate and the tightening cylinder shell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311053561.3A CN116892398B (en) | 2023-08-21 | 2023-08-21 | Slurry balance and double-shield double-mode shield machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311053561.3A CN116892398B (en) | 2023-08-21 | 2023-08-21 | Slurry balance and double-shield double-mode shield machine |
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| CN116892398B true CN116892398B (en) | 2024-05-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4014089A (en) * | 1988-08-23 | 1990-03-01 | Voest-Alpine Bergtechnik Gesellschaft Mbh | Device for guying a drift advancing machine within a drift |
| JP2002129888A (en) * | 2000-10-25 | 2002-05-09 | Shimizu Corp | Tunnel boring machine and tunnel boring method |
| CN105840201A (en) * | 2016-03-29 | 2016-08-10 | 中铁工程装备集团有限公司 | TBM advancing and duct piece assembling synchronization work method |
| CN115726806A (en) * | 2022-12-07 | 2023-03-03 | 中交天和机械设备制造有限公司 | Slag discharging system of slurry TBM dual-mode shield tunneling machine and switching slag discharging method thereof |
-
2023
- 2023-08-21 CN CN202311053561.3A patent/CN116892398B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4014089A (en) * | 1988-08-23 | 1990-03-01 | Voest-Alpine Bergtechnik Gesellschaft Mbh | Device for guying a drift advancing machine within a drift |
| JP2002129888A (en) * | 2000-10-25 | 2002-05-09 | Shimizu Corp | Tunnel boring machine and tunnel boring method |
| CN105840201A (en) * | 2016-03-29 | 2016-08-10 | 中铁工程装备集团有限公司 | TBM advancing and duct piece assembling synchronization work method |
| CN115726806A (en) * | 2022-12-07 | 2023-03-03 | 中交天和机械设备制造有限公司 | Slag discharging system of slurry TBM dual-mode shield tunneling machine and switching slag discharging method thereof |
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| CN116892398A (en) | 2023-10-17 |
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