CN220133967U - Water-rich stratum shield originating portal sealing device - Google Patents
Water-rich stratum shield originating portal sealing device Download PDFInfo
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- CN220133967U CN220133967U CN202321438000.0U CN202321438000U CN220133967U CN 220133967 U CN220133967 U CN 220133967U CN 202321438000 U CN202321438000 U CN 202321438000U CN 220133967 U CN220133967 U CN 220133967U
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- steel plate
- tunnel portal
- continuous steel
- portal
- pressing plate
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- 238000007789 sealing Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 119
- 239000010959 steel Substances 0.000 claims abstract description 119
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 abstract description 11
- 239000002689 soil Substances 0.000 abstract description 8
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model belongs to the technical field of tunnel shield construction, and particularly relates to a sealing device for an originating tunnel portal of a water-rich stratum shield; the device comprises a tunnel portal steel ring, wherein one end of the tunnel portal steel ring is connected with an end wall of a tunnel portal structure to prolong the wrapping length of the tunnel portal to a cutter disc, the other end of the tunnel portal steel ring is provided with a rubber curtain cloth and a folding pressing plate, the folding pressing plate is attached to the rubber curtain cloth on the entering side of the cutter disc, the rubber curtain cloth extends towards the center of the tunnel portal relative to the folding pressing plate, a stop block is arranged at the folding pressing plate folding position on the entering side of the cutter disc, and the folding pressing plate is limited by the stop block to reversely bend; the gate steel ring is provided with a grouting opening, and the opening positions are 12 points, 3 points, 9 points, 5 points and 7 points of the clock point; the utility model can reduce or even avoid the chiseling of the tunnel portal, prevent the instability of the tunnel portal and the subsidence of the ground caused by the damage of the enclosure structure, simultaneously can conduct the blocking of the tunnel portal in advance, avoid the water loss and soil loss, ensure the stability of stratum, improve the blocking efficiency of the tunnel portal by matching with the use of double-liquid grouting, and ensure the starting safety.
Description
Technical Field
The utility model belongs to the technical field of tunnel shield construction, and particularly relates to a sealing device for an originating tunnel portal of a water-rich stratum shield.
Background
In recent years, with the large development of urban rail transit in China, the shield method is widely applied to rail construction due to the advantages of safety, high efficiency, wide adaptability and the like. The earth pressure balance shield is becoming the first choice for shield construction under various composite stratum conditions due to wide stratum adaptability and strong rock breaking capacity. However, in the construction of the water-rich stratum, because the water content in the stratum is large, in the starting process of the shield machine, in order to avoid the premature rotation of the cutter disc and stir the sealing device of the tunnel portal, the maintenance structure at the tunnel portal is required to be chiseled away, in the process of breaking the tunnel portal, the soil body at the tunnel portal is stabilized due to unavoidable sand and stone dropping phenomenon caused by vibration and the like generated during mechanical breaking, meanwhile, the construction of the earth pressure type earth balance shield machine is realized, the shield starting and receiving are construction links with large technical difficulty and high risk in the shield construction, once the shield is improperly processed, and the soil body of the tunnel portal is easily lost or collapsed before the shield is pushed or pushed out, so that the station is submerged or the surrounding building is sunk.
Disclosure of Invention
The utility model provides a device for reinforcing the sealing effect of a shield starting tunnel portal by a water-rich stratum, aiming at the problems that the shield machine is easy to collapse on the ground, the shield machine is flooded, the tunnel collapses, casualties and the like in the construction of the water-rich stratum at the starting end.
The utility model provides the following technical scheme: the utility model provides a rich water stratum shield starts door sealing device, including the door steel loop, door steel loop one end is connected with door structure end wall and is used for prolonging the parcel length of door to the blade disc, the rubber curtain cloth is installed to door steel loop other end and is folded the clamp plate, the rubber curtain cloth sets up the round along door steel loop hoop closure, folding clamp plate is in the blade disc entering side and is pasted the rubber curtain cloth, the rubber curtain cloth stretches out to the door center relative folding clamp plate, at blade disc entering side folding clamp plate turns over the position and installs the dog, folding clamp plate back rest dog limits its reverse buckling; and grouting openings are formed in the portal steel ring, and the opening positions are 12 points, 3 points, 9 points, 5 points and 7 points of the clock point.
Further, the portal steel ring comprises an end wall side annular continuous steel plate, a radial continuous steel plate and a standard section side annular continuous steel plate; the two ends of the radial continuous steel plate are respectively sealed and connected with inner holes of the end wall side annular continuous steel plate and the standard section side annular continuous steel plate, and the fastening steel plate is connected among the end wall side annular continuous steel plate, the radial continuous steel plate and the standard section side annular continuous steel plate; the end wall side annular continuous steel plate is connected with the end wall of the portal structure, and the rubber curtain cloth and the folding pressing plate are connected with the standard section side annular continuous steel plate; the grouting opening is formed in the radial continuous steel plate, and a grouting pipe head with an internal thread is welded after the grouting opening.
Further, bolt holes are reserved on the annular surface of the standard section side annular continuous steel plate, and bolts penetrate into the bolt holes to fix the folding pressing plate and the rubber curtain cloth; bolt hole sites are reserved on the annular surface of the annular continuous steel plate at the side of the end wall and are connected with the embedded steel ring in the end wall of the portal structure.
Further, the end wall side annular continuous steel plates, the radial continuous steel plates and the standard section side annular continuous steel plates are connected through double-sided full welding.
Further, the headwall-side annular continuous steel plate and the standard section-side annular continuous steel plate are rings concentric with the tunnel portal.
Further, the supporting end of the folding pressing plate is flush with the outer ring of the standard section side annular continuous steel plate, and the stop block is welded with the supporting part of the folding pressing plate and extends to the suspending part of the folding pressing plate in a overhanging manner.
Compared with the prior art, the utility model has the advantages that:
1. do not need to carry out the portal and chisel and remove, personnel construction operation unsafe factor produces when avoiding chisel to remove the portal, makes portal site envelope complete simultaneously, ensures portal site soil body stability.
2. The shield body can enter the tunnel portal sealing device in advance, so that the cutter head can be prevented from plugging the tunnel portal in the precipitation control area and the soil body reinforcing area of the starting end as early as possible, and the phenomenon that the tunnel portal leaks water to cause loss of fine soil and instability of the tunnel portal due to the fact that underground water passes through a runoff passage along the shield body after the cutter head breaks through the reinforcing area and the effective area of the precipitation range is avoided.
3. And (3) performing secondary grouting through the grouting holes, adjusting the grouting pressure, the slurry mixing ratio and the grouting amount, grouting and filling gaps among the stratum in the extending steel ring, the duct piece and the shield tail seal, and guaranteeing the sealing effect of the tunnel portal.
Drawings
FIG. 1 is a schematic view of the installation of the present utility model;
FIG. 2 is a schematic view of an extended steel ring;
FIG. 3 is an elevational schematic of the present utility model;
in the figure: 1-an end wall of a portal structure; 2-end wall side annular continuous steel plates; 3-radial continuous steel sheet; 4-reinforced steel plates; 5-a standard section side annular continuous steel plate; 6-connecting bolts; 7-a stop block; 8-folding a pressing plate; 9-rubber curtain cloth; 10-grouting pipe orifice.
Detailed Description
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
As shown in fig. 1, 2 and 3: the utility model provides a rich water stratum shield starts door sealing device, including the door steel loop, door steel loop one end is connected with door structure end wall 1 and is used for prolonging the parcel length of door to the blade disc, rubber curtain cloth 9 and folding clamp plate 8 are being installed to the door steel loop other end, rubber curtain cloth 9 is along the door steel loop hoop seal setting round, folding clamp plate 8 is along rubber curtain cloth 9 in blade disc entering side, rubber curtain cloth 9 with its flexibility and waterproof performance guarantee water-proof effects, folding clamp plate 8 guarantees with its rigidity that door sealing device can bear certain pressure and not destroy, rubber curtain cloth 9 stretches out to the door center relative folding clamp plate 8. A stop block 7 is arranged at the folding position of the folding pressing plate 8 at the inlet side of the cutter head, and the folding pressing plate 8 is supported against the stop block 7 to limit reverse bending, so that the folding pressing plate 8 is prevented from being turned outwards during grouting; and a grouting opening is formed in the portal steel ring, and the opening positions are 12 points, 3 points, 9 points, 5 points and 7 points of the clock point positions, so that grouting diffusion filling effect is guaranteed.
The length of the tunnel portal wrapping the cutterhead is prolonged through the tunnel portal steel ring, excessive chiseling and even non-chiseling of the tunnel portal are avoided, grouting ports at different positions on the tunnel portal steel ring are utilized for double-liquid grouting blocking, gaps between stratum and duct piece and shield tail sealing in the tunnel portal steel ring are filled with grouting according to the setting time and grouting pressure for adjusting the slurry mixing ratio, and grouting diffusion radius is guaranteed so as to guarantee the sealing effect of the tunnel portal. If groundwater excessively develops and the mobility of water is big, then open well lower part slip casting mouth (5 points, 7 points) and carry out the quick shutoff of portal, top slip casting mouth (12 points) then regard as wash port and inspection hole at this moment.
The tunnel portal steel ring comprises an end wall side annular continuous steel plate 2, a radial continuous steel plate 3 and a standard section side annular continuous steel plate 5; the two ends of the radial continuous steel plate 3 are respectively sealed and connected with inner holes of the end wall side annular continuous steel plate 2 and the standard section side annular continuous steel plate 5, a reinforced steel plate 4 is connected among the end wall side annular continuous steel plate 2, the radial continuous steel plate 3 and the standard section side annular continuous steel plate 5, and the reinforced steel plate 4 connects the two side annular continuous steel plates and the radial continuous steel plate into a whole, so that the integrity and the stability of the radial continuous steel plate are enhanced, and the radial rigidity of the radial continuous steel plate is enhanced; the end wall side annular continuous steel plate 2 is connected with the end wall 1 of the portal structure, and the rubber curtain cloth 9 and the folding pressing plate 8 are connected with the standard section side annular continuous steel plate 5; the grouting opening is arranged on the radial continuous steel plate 3, and a grouting pipe head with an internal thread is welded after the grouting opening. The grouting pipe head is used for connecting a grouting pipe of the double-liquid grouting machine.
Bolt holes are reserved on the annular surface of the standard section side annular continuous steel plate 5, and bolts penetrate into the bolt holes to fix the folding pressing plate 8 and the rubber curtain cloth 9; bolt hole sites are reserved on the annular surface of the annular continuous steel plate 2 at the side of the end wall and are connected with the embedded steel ring in the end wall 1 of the portal structure.
The end wall side annular continuous steel plates 2, the radial continuous steel plates 3 and the standard section side annular continuous steel plates 5 are connected in a double-sided full-welded mode, and sealing effect is guaranteed.
The headwall side annular continuous steel plate 2 and the standard section side annular continuous steel plate 5 are rings concentric with the tunnel portal.
The support end of the folding pressing plate 8 is flush with the outer ring of the standard section side annular continuous steel plate 5, the stop block 7 is welded with the support part of the folding pressing plate 8, and the stop block is overhanging to the suspending part of the folding pressing plate 8.
Through the tunnel portal steel ring, the shield body can enter the tunnel portal sealing device in advance, the cutter head is guaranteed to plug the tunnel portal in the precipitation control area and the original end soil body reinforcing area as soon as possible, and the phenomenon that the underground water passes through the runoff passage of the shield body after the cutter head breaks through the reinforcing area and the precipitation range effective area, so that the tunnel portal leaks water to cause loss of fine soil and instability of the tunnel portal is avoided.
The concrete construction steps are as follows:
s1: the portal steel ring is connected with the embedded steel ring in the originating end wall:
(1) After the processing of the steel ring of the tunnel portal is finished, the grouting opening is required to be blocked and protected, and meanwhile, a cross support is arranged in the steel ring to prevent the steel ring of the tunnel portal from deforming in the transportation and installation processes;
(2) The rubber curtain cloth and the folding pressing plate are arranged on one side of the standard section of the steel ring of the tunnel portal on the ground in advance, and a stop block for preventing the folding pressing plate from turning outwards is welded at the turning position of the folding pressing plate;
(3) And hoisting the portal steel ring to the embedded steel ring in the originating end wall, adjusting and positioning, connecting and fixing the portal steel ring and the embedded steel ring by using bolts, and fully welding joints to ensure the sealing effect.
S2: and (3) pushing a shield machine:
(1) The shield tunneling machine starts tunneling, the tunnel portal steel ring is arranged to preposition the tunnel portal sealing device, the tunnel portal is prevented from being chiseled, and the cutter head of the shield tunneling machine can start to rotate for cutting and pushing after entering the tunnel portal sealing device arranged on the tunnel portal steel ring and being longer than the length of the rubber curtain cloth.
S3: the shield body of the shield machine enters the sealing device of the steel ring portal of the portal:
(1) Before the shield body of the shield machine enters the tunnel portal sealing device, synchronous grouting or secondary grouting is not carried out, the shield tail of the shield machine enters the sealing device and is separated from the ring 3 of the sealing device, the condition of grouting for blocking the tunnel portal is provided, and the machine is stopped for grouting for blocking the tunnel portal;
s4: grouting openings on the steel rings of the tunnel portal are opened for grouting to seal the tunnel portal:
(1) And the grouting opening on the steel ring of the tunnel portal is started, an external mobile double-liquid grouting machine is connected, the effective diffusion radius of the slurry can be ensured to completely cover the gap between the steel ring of the tunnel portal and the sealing of the duct piece and the shield tail by adjusting the grouting pressure, and the slurry mixing ratio is adjusted, so that the slurry is solidified as early as possible on the premise of meeting certain fluidity, and the grouting sealing effect is achieved.
S5: restoring tunneling of the shield machine:
(1) After grouting and plugging the tunnel portal are completed, the tunnel portal sealing effect is checked and accepted to meet the requirements, and then the shield tunneling machine is recovered.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A water-rich stratum shield originating portal sealing device is characterized in that: the device comprises a tunnel portal steel ring, wherein one end of the tunnel portal steel ring is connected with a tunnel portal structure end wall (1) to prolong the wrapping length of the tunnel portal on a cutter disc, the other end of the tunnel portal steel ring is provided with a rubber curtain cloth (9) and a folding pressing plate (8), the rubber curtain cloth (9) is sealed and arranged in a circle along the ring direction of the tunnel portal steel ring, the folding pressing plate (8) is attached to the rubber curtain cloth (9) at the inlet side of the cutter disc, the rubber curtain cloth (9) extends towards the center of the tunnel portal relative to the folding pressing plate (8), a stop block (7) is arranged at the folding position of the cutter disc inlet side folding pressing plate (8), and the folding pressing plate (8) is limited to be reversely bent by the stop block (7); and grouting openings are formed in the portal steel ring, and the opening positions are 12 points, 3 points, 9 points, 5 points and 7 points of the clock point.
2. The water-rich stratum shield originating portal sealing device of claim 1, wherein: the tunnel portal steel ring comprises an end wall side annular continuous steel plate (2), a radial continuous steel plate (3) and a standard section side annular continuous steel plate (5); the two ends of the radial continuous steel plate (3) are respectively sealed and connected with inner holes of the end wall side annular continuous steel plate (2) and the standard section side annular continuous steel plate (5), and a reinforced steel plate (4) is connected among the end wall side annular continuous steel plate (2), the radial continuous steel plate (3) and the standard section side annular continuous steel plate (5); the end wall side annular continuous steel plate (2) is connected with the end wall (1) of the tunnel portal structure, and the rubber curtain cloth (9) and the folding pressing plate (8) are connected with the standard section side annular continuous steel plate (5); the grouting opening is arranged on the radial continuous steel plate (3), and a grouting pipe head with an internal thread is welded after the grouting opening.
3. The water-rich stratum shield originating portal sealing device of claim 2, wherein: the annular surface of the standard section side annular continuous steel plate (5) is reserved with bolt holes, and bolt holes are penetrated into the bolt holes to fix the folding pressing plate (8) and the rubber curtain cloth (9); bolt hole sites are reserved on the annular surface of the annular continuous steel plate (2) at the side of the end wall and are connected with the embedded steel ring in the end wall (1) of the portal structure.
4. The water-rich stratum shield originating portal sealing device of claim 2, wherein: the end wall side annular continuous steel plate (2), the radial continuous steel plate (3) and the standard section side annular continuous steel plate (5) are connected in a double-sided full-welded mode.
5. The water-rich stratum shield originating portal sealing device of claim 2, wherein: the end wall side annular continuous steel plate (2) and the standard section side annular continuous steel plate (5) are rings concentric with the tunnel portal.
6. The water-rich stratum shield originating portal sealing device of claim 2, wherein: the supporting end of the folding pressing plate (8) is flush with the outer ring of the standard section side annular continuous steel plate (5), and the stop block (7) is welded with the supporting part of the folding pressing plate (8) and extends to the suspending part of the folding pressing plate (8) in a overhanging mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321438000.0U CN220133967U (en) | 2023-06-07 | 2023-06-07 | Water-rich stratum shield originating portal sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321438000.0U CN220133967U (en) | 2023-06-07 | 2023-06-07 | Water-rich stratum shield originating portal sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220133967U true CN220133967U (en) | 2023-12-05 |
Family
ID=88949314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321438000.0U Active CN220133967U (en) | 2023-06-07 | 2023-06-07 | Water-rich stratum shield originating portal sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220133967U (en) |
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2023
- 2023-06-07 CN CN202321438000.0U patent/CN220133967U/en active Active
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