CN111828094A - Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof - Google Patents
Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof Download PDFInfo
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- CN111828094A CN111828094A CN202010613668.9A CN202010613668A CN111828094A CN 111828094 A CN111828094 A CN 111828094A CN 202010613668 A CN202010613668 A CN 202010613668A CN 111828094 A CN111828094 A CN 111828094A
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 19
- 238000004806 packaging method and process Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000010276 construction Methods 0.000 description 21
- 230000005641 tunneling Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/107—Dams, e.g. for ventilation inflatable
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a deep-buried earth pressure balance shield hole-entering double-airbag sealing device and a sealing method thereof, wherein the sealing device comprises: the hole ring is fixed on the outer side of the shield hole inlet; at least two high-pressure rubber air bags which are expanded and then fill gaps between the hole ring and the shield and between the hole ring and the duct piece are arranged in the hole ring in parallel along the shield advancing direction, each high-pressure rubber air bag is connected with a medium charging pipeline, and the hole ring is provided with a charging channel for the medium charging pipeline to penetrate out; the rubber plate is expanded along with the expansion of the high-pressure rubber air bag, the rubber plate cover is arranged outside the high-pressure rubber air bag, and two sides of the rubber plate cover are fixed with the hole ring. The sealing device greatly reduces the disturbance risk of the shield tunnel entrance to the surrounding environment, and can realize the safe tunnel entrance of the shield under the conditions of ultra-deep soil covering and even high pressure water.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a deep-buried earth pressure balance shield hole-entering double-airbag sealing device and a sealing method thereof.
Background
In soft soil areas such as Shanghai, Tianjin and Ningbo, the shield method is adopted to construct the tunnel between the subway and the water taking and draining tunnel, and abundant practical experience and theoretical experience are accumulated, however, the risk in the shield tunnel entering construction process is still one of the main problems needing to be solved in the tunnel construction, and is mainly shown in the following steps: the collapse of the soil body, the flowing water and the flowing sand which cause annular gaps (shield shells and hole rings or pipe pieces and hole rings), the knocking head of the shield machine, the fragmentation of the pipe pieces, the opening of the splicing seams and the like directly cause the settlement of the soil body, influence the surrounding environment, and even cause serious accidents such as pipeline breakage, ground collapse and the like. In the prior art, the risk of shield tunneling construction is reduced by mainly adopting soil body reinforcement measures and annular gap sealing treatment at the outer side of a working well. However, due to the differences of the geological conditions of various projects, the diameter of the shield, the buried depth of the tunnel and the related construction reinforcement quality, the shield tunneling construction still has great construction potential safety hazards. Generally, the main disadvantages of the shield tunneling technique are: (1) the shield tunnel entering construction has a plurality of risk points and large risk, and the occurrence of dangerous cases is difficult to control; (2) the mud and slurry leakage phenomenon is easily caused, so that the structural safety problem is caused or the stratum settlement is overlarge; (3) the outside needs stratum reinforcement of a large area and local precipitation, and the reinforcement and precipitation effects are difficult to guarantee; (4) the shield needs to be prepared for a lot of time before entering the hole, such as chiseling.
In the process that the shield passes through the opening and the whole tunnel construction, a circular gap always exists between the hole ring and the shield, and between the hole ring and the tunnel structure, if sealing treatment is not carried out, soil mass and water outside the hole ring can flow into a working well from the gap, so that the soil mass at the hole ring is lost, stratum settlement deformation and environment damage are caused, and the influence is great, therefore, the sealing technology of the hole ring gap is also an important technology in the construction of the shield into the hole.
Because a certain gap exists between the diameter of the working well hole ring and the outer diameter of the shield, in order to prevent soil from losing from the gap when the shield starts and during construction, the conventional sealing device mainly considers mounting a sealing device consisting of a curtain cloth rubber plate, a ring plate, a one-way hinge plate and the like around the hole ring, and in order to ensure the lap joint angle of the hinge plate and the duct piece, the back of the duct piece can be considered to be additionally provided with an embedded steel plate so as to enhance the water stop effect of the ring when the shield starts and receives construction.
The prior utility model discloses an inflatable tunnel shield seals high pressure rubber gasbag (application number: 201609847. X) discloses an inflatable tunnel shield seals high pressure rubber gasbag, though some improvements are made to the hole circle seal, the device only arranges a gasbag, when the gasbag aerifys untimely or aerify inadequately, the gap packing between hole circle and shield and between hole circle and section of jurisdiction all can not be guaranteed to influence shield and advance the hole safety.
In the prior art, the technology of one-way hinge plates and socks adopted for sealing gaps during hole leaving is ideal, the technology prevents soil outside the hole from flowing into the well by utilizing the tightening of the socks and the protection of the one-way hinge plates, but is difficult to establish incision balance pressure for a soil pressure balance shield, and the socks need to be ensured not to turn out into the well in construction. In addition, when the shield enters the hole, the flow direction of the soil body at the hole opening is in the same direction as that of the sealed sock, and the soil body is easy to run off into the well under the action of lateral pressure, so that the sealing is difficult to ensure when the hole opening is positioned in a sandy soil layer with large soil body performance mobility, poor self-supporting capability and high underground water level.
At present, the radially adjustable eyebrow plates are adopted in each project and are fixed between an opening ring plate and an embedded steel plate of an outer arc surface of a lining opening ring by electric welding. When the hole is difficult to seal under the condition of leakage, only the buried pipe is adopted for drainage and sealing, and finally the drainage pipe is pressed into grout to complete the sealing of the gap of the hole, but the adverse effect of ground deformation is easy to generate.
In conclusion, the shield tunneling sealing device in the existing shield tunneling construction has the characteristics of high shield tunneling technology difficulty, high reinforcing cost, difficulty in sealing, multiple potential safety hazards in construction, easiness in collapse, water leakage and the like, and the similar shield tunneling machine tunneling sealing device has various technical or operational defects.
Disclosure of Invention
In view of the above circumstances, the present invention provides a double-airbag sealing device for a deep-buried earth pressure balance shield hole and a sealing method thereof, which solve the problems of technical or operational deficiencies of the existing shield hole sealing device.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a bury balanced shield of earth pressure deeply and advance hole double-balloon sealing device, includes:
the hole ring is fixed on the outer side of the shield hole inlet;
at least two high-pressure rubber air bags which are expanded and then fill gaps between the hole ring and the shield and between the hole ring and the duct piece are arranged in the hole ring in parallel along the shield advancing direction, each high-pressure rubber air bag is connected with a medium charging pipeline, and the hole ring is provided with a charging channel for the medium charging pipeline to penetrate out;
the rubber plate is expanded along with the expansion of the high-pressure rubber air bag, the rubber plate cover is arranged outside the high-pressure rubber air bag, and two sides of the rubber plate cover are fixed with the hole ring.
In the embodiment of the invention, the rubber bag further comprises two side baffles which are respectively arranged at two opposite sides of the rubber plate and are fixed with the hole ring, and an outer baffle which is detachably fixed between the two side baffles, wherein the outer baffle, the two side baffles and the hole ring are surrounded to form a space for packaging the high-pressure rubber air bag and the rubber plate, and the height of each side baffle is smaller than the width of the gap.
In the embodiment of the invention, the two expanded high-pressure rubber air bags are in close contact with each other.
In the embodiment of the invention, the side baffle plate comprises a hole ring and two side baffle plates, wherein the hole ring is fixed on the inner side of the hole ring through the inner baffle plates.
In the embodiment of the invention, the side baffle further comprises stiffening plates connected between the outer sides of the side baffles and the hole rings.
In the embodiment of the invention, the device also comprises a mud filling pipe, and the end part of the mud filling pipe is inserted into the inner side of the rubber plate.
In the embodiment of the invention, the device also comprises a circle of sponge arranged outside the side baffle.
The invention also provides a sealing method for the deep-buried earth pressure balance shield tunneling, which comprises the following steps:
before the shield enters the hole, the deep buried earth pressure balance shield double-airbag sealing device is arranged in the hole opening through the hole ring;
filling and expanding the high-pressure rubber air bag for the first time before the shield enters the tunnel ring, and filling a gap between the shield and the tunnel ring by using the high-pressure rubber air bag when the shield enters the tunnel ring;
and after the shield continues to be pushed forward and leaves the hole ring, performing secondary filling expansion on the high-pressure rubber air bag, and filling a gap between the tunnel segment and the hole ring.
In the embodiment of the invention, the high-pressure rubber air bags filled and expanded for the first time and the high-pressure rubber air bags filled and expanded for the second time are different, and the high-pressure rubber air bags filled and expanded for the first time are positioned in front of the shield propulsion compared with the high-pressure rubber air bags filled and expanded for the second time.
In the embodiment of the invention, each high-pressure rubber air bag comprises two arc-shaped air bags which are annularly arranged and two spare air bags corresponding to the two arc-shaped air bags, and when one of the two arc-shaped air bags which are annularly arranged cannot be used, the corresponding spare air bag is started.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the deep-buried soil pressure balance double-air-bag sealing device is mainly used for improving the structural form of the sealing air bag, the mounting and fixing mode and the like aiming at the characteristics of high shield tunneling technology difficulty, high reinforcing cost, difficult sealing, more potential safety hazards in construction, easiness in collapse and water leakage and the like during the ordinary shield tunneling construction, and the sealing air bag sealing device is high in inflation speed, small in appearance, convenient to operate and capable of maintaining pressure for a long time, so that the risk of disturbance of the tunneling to the surrounding environment is greatly reduced, the shield tunneling can be safely tunneled under the conditions of ultra-deep soil covering and even high pressure water, and the deep-buried shield tunneling construction device has important significance for guaranteeing the construction safety of the deep-buried shield tunneling.
(2) The high-pressure rubber air bag disclosed by the invention is expanded twice, the first expansion is used for filling the gap between the hole ring and the shield, and the second expansion is used for filling the gap between the hole ring and the duct piece, so that the gap near the hole ring is completely filled.
(3) When the high-pressure rubber air bag is not inflated timely or not inflated enough, bentonite slurry is injected into the inner side of the rubber plate, so that the rubber plate is bulged to be in close contact with the shield, the effect of preventing the sand and mud from leaking is achieved, and the safety of the shield in entering the hole is ensured.
(4) The invention adopts the standby air bags, and when one arc-shaped air bag cannot be used, the corresponding standby air bag is started, so that the sealing success rate is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a hole-entering double-airbag sealing device of a deep-buried earth pressure balance shield of the invention fixed on a hole ring.
FIG. 2 is an enlarged schematic view of the high pressure rubber bladder of FIG. 1 of the present invention prior to inflation at S.
FIG. 3 is an enlarged schematic view of the first inflation of the high pressure rubber bladder of FIG. 1 at S in accordance with the present invention.
FIG. 4 is an enlarged schematic view of the second inflation of the high pressure rubber bladder of FIG. 1 at S in accordance with the present invention.
The correspondence of reference numerals to components is as follows:
a high-pressure rubber air bag 1; a side baffle 2; an outer baffle 3; a hole ring 4; a rubber plate 5; a stiffening plate 6; an inner baffle 7.
Detailed Description
The invention improves the structural form, the installation and fixing mode and the like of the sealing air bag, develops the sealing device with high inflation speed, small appearance, convenient operation and long-term pressure maintaining, thereby greatly reducing the risk of disturbance of the tunnel to the surrounding environment, realizing the safe tunnel entry of the shield under the conditions of ultra-deep soil covering and even high pressure bearing water, and having important significance for ensuring the construction safety of the deeply buried shield tunnel entry.
To facilitate an understanding of the present invention, the following description is made in conjunction with the accompanying drawings and examples.
Referring to fig. 1 and fig. 2, the present invention provides a double-airbag sealing device for a deep-buried earth pressure balance shield tunnel, comprising: the shield tunnel comprises a hole ring 4, at least two high-pressure rubber air bags 1 and a rubber plate 5, wherein the hole ring 4 is fixed on the outer side of a tunnel entrance of the shield; at least two high-pressure rubber air bags 1 are expanded to fill gaps between a hole ring 4 and a shield and between the hole ring 4 and a duct piece, the at least two high-pressure rubber air bags 1 are arranged in the hole ring 4 in parallel along the shield advancing direction, each high-pressure rubber air bag 1 is connected with a medium charging pipeline (not shown), and the hole ring 4 is provided with a charging channel for the medium charging pipeline to penetrate out; the rubber plate 5 expands along with the expansion of the high-pressure rubber air bag 1, and the rubber plate 5 is covered outside the high-pressure rubber air bag 1 and two sides of the rubber plate are fixed with the hole ring 4.
The sealing device further comprises two side baffles 2 which are respectively arranged on two opposite sides of the rubber plate 5 and fixed with the hole ring 4 and an outer baffle 3 which is detachably fixed between the two side baffles 2, the outer baffle 3, the two side baffles 2 and the hole ring 4 enclose a space for forming a packaged high-pressure rubber air bag 1 and the rubber plate 5, and the height of each side baffle 2 is smaller than the width of the gap. The two side baffles 2 can protect the high-pressure rubber air bag 1 and can also play a role in blocking mud. In the embodiment of the invention, one side of the side baffle 2 fixed with the hole ring 4 is annular; the side baffles 2 are made of 10 steel plates, and the distance between the two side baffles 2 is 40cm-50 cm; the height of the two side baffles 2 is smaller than the clearance between the hole ring 4 and the shield machine and the clearance between the hole ring 4 and the duct piece. The outer baffle 3 is made of 3 steel plates. The high-pressure rubber air bag 1 is packaged by the outer baffle 3, so that the high-pressure rubber air bag 1 is protected; the outer baffle 3 is removed in one piece for one time when removed.
Preferably, the high-pressure rubber air bag 1 is made of a material which has certain abrasion resistance and can be closely attached to the surfaces of a shield machine and a duct piece for a long time; the inflation device of the high-pressure rubber air bag 1 has the advantages of reasonable selection, high inflation speed, small and exquisite appearance and convenient operation, so that the high-pressure rubber air bag 1 can maintain pressure for a long time, and stably seals and fills gaps between the shield machine and the hole ring 4 and gaps between duct pieces and the hole ring 4. In the embodiment of the invention, each high-pressure rubber air bag 1 comprises two arc-shaped air bags which are annularly arranged and two spare air bags corresponding to the two arc-shaped air bags, namely four air bags, when one of the two arc-shaped air bags which are annularly arranged cannot be used, the corresponding spare air bag is started, and the spare air bag and the arc-shaped air bags are annularly surrounded. Preferably, the two high-pressure rubber air bags 1 are in close contact after being expanded so as to ensure that the sealing effect is good.
In the embodiment of the invention, as shown in fig. 3 and 4, the expansion of the high-pressure rubber air bag 1 is divided into two times, the first expansion is used for sealing and filling the gap between the hole ring 4 and the shield, the expansion height is more than 25cm, the second expansion is used for filling the gap between the hole ring 4 and the duct piece, and the expansion height is more than 35 mm; the expansion height of the high-pressure rubber air bag 1 is adjusted according to specific construction conditions, and the first expansion height and the second expansion height can be the same or different.
The medium charging pipeline is an inflation pipe, specifically, the high-pressure rubber air bag 1 can be inflated by charging air into the high-pressure rubber air bag 1 by adopting an inflation device matched with the inflation pipe, preferably, the sealing device further comprises a mud charging pipe (not shown) and a grouting mechanism, wherein bentonite slurry is injected into the rubber plate 5 to expand the rubber plate 5, the end part of the mud charging pipe is inserted into the inner side of the rubber plate 5, and specifically, the mud charging pipe enters the inner side of the rubber plate 5 from the left side baffle 2 in fig. 2; specifically, when the high-pressure rubber air bag 1 is inflated and fails, the bentonite slurry is immediately filled to enable the rubber plate 5 to expand to be in close contact with the shield machine, and the function of preventing the sand in the shield machine from leaking is achieved. In a preferred embodiment of the invention, the rubber plate 5 can form a protective layer on the outside of the high-pressure rubber airbag 1, so as to protect the high-pressure rubber airbag 1 and support the high-pressure rubber airbag 1, and prevent the sealing effect of the high-pressure rubber airbag 1 from being affected by the change of the disturbance position; in the embodiment of the invention, the width of the rubber plate 5 is 1000mm, the thickness of the rubber plate 5 is 5mm, and the rubber plate 5 is fixed with the hole ring 4 by the screw 51.
Preferably, in order to enhance the connection strength between the side baffle 2 and the hole ring 4, a stiffening plate 6 is further included for connecting the outer side of the side baffle 2 and the hole ring 4; in the embodiment of the present invention, the stiffening plate 6 is a right-angled triangular plate.
In the embodiment of the invention, the sealing device further comprises an inner baffle 7 fixed on the hole ring 4, the two side baffles 2 are fixed with the hole ring 4 through the inner baffle 7, and specifically, the inner baffle 7 is in an arch shape and is fixedly attached to the hole ring 4; the arrangement of the inner baffle 7 can prevent the side baffle 2, the rubber plate 5 and the stiffening plate 6 from damaging the structure of the hole ring by forming more holes on the hole ring 4 when the fixing is performed. The stiffening plate 6 and the inner baffle 7 are both made of steel plates, and have high strength and good stability.
In the embodiment of the invention, the tunnel is also provided with a circle of sponge 8 which is arranged outside the side baffle 2 and is used for absorbing grease in the tunnel; specifically, the sponge 8 is provided on the side of the side shield 2 facing away from the shield advancing direction a.
The deep-buried earth pressure balance shield hole-entering double-airbag sealing device is convexly arranged on the surface of the hole ring 4, so that holes are prevented from being formed in the hole ring 4, the construction is simple, and the intact structure of the hole ring is favorably ensured.
The structure of the double-airbag sealing device for the deep-buried earth pressure balance shield tunnel entry of the invention is specifically described above, and the sealing method thereof is described below.
Before the shield enters the hole, the deep buried earth pressure balance shield double-airbag sealing device is arranged in the hole through the hole ring 4;
before the shield enters the tunnel ring 4, the high-pressure rubber air bag 1 is filled and expanded for the first time, and when the shield enters the tunnel ring 4, a gap between the shield and the tunnel ring 4 is filled by the high-pressure rubber air bag 1;
and after the shield continues to advance and leaves the hole ring 4, the high-pressure rubber air bag 1 is filled and expanded for the second time, and a gap between the tunnel segment and the hole ring 4 is filled.
Further, the high-pressure rubber air bags 1 which are filled and expanded for the first time and the high-pressure rubber air bags 1 which are filled and expanded for the second time are different, and the high-pressure rubber air bags 1 which are filled and expanded for the first time are positioned in front of the shield propulsion compared with the high-pressure rubber air bags 1 which are filled and expanded for the second time.
While the present invention has been described in detail and with reference to the accompanying drawings and examples, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a bury balanced shield of earth pressure deeply and advance two gasbag sealing device in hole which characterized in that includes:
the hole ring is fixed on the outer side of the shield hole inlet;
at least two high-pressure rubber air bags which are expanded and then fill gaps between the hole ring and the shield and between the hole ring and the duct piece are arranged in the hole ring in parallel along the shield advancing direction, each high-pressure rubber air bag is connected with a medium charging pipeline, and the hole ring is provided with a charging channel for the medium charging pipeline to penetrate out;
the rubber plate is expanded along with the expansion of the high-pressure rubber air bag, the rubber plate cover is arranged outside the high-pressure rubber air bag, and two sides of the rubber plate cover are fixed with the hole ring.
2. The deep-buried earth pressure balance shield hole-entering double-air-bag sealing device according to claim 1, further comprising two side baffles respectively arranged on opposite sides of the rubber plate and fixed with the hole ring, and an outer baffle detachably fixed between the two side baffles, wherein the outer baffle, the two side baffles and the hole ring are surrounded to form a space for packaging the high-pressure rubber air bag and the rubber plate, and the height of each side baffle is smaller than the width of the gap.
3. The deep-buried earth pressure balance shield hole-entering double-air-bag sealing device as claimed in claim 1, wherein the two high-pressure rubber air bags are in close contact after being inflated.
4. The deep-buried earth pressure balance shield hole-entering double-airbag sealing device as claimed in claim 1, further comprising an inner baffle fixed on the hole ring, and two side baffles are fixed with the hole ring through the inner baffle.
5. The deep-buried soil pressure balance shield hole-entering double-airbag sealing device of claim 2, further comprising a stiffening plate connected between the outer side of each side baffle and the hole ring.
6. The deep-buried soil pressure balance shield hole-entering double-airbag sealing device as recited in claim 1, further comprising a mud-filling pipe, wherein an end of the mud-filling pipe is inserted into the inner side of the rubber plate.
7. The deep-buried earth pressure balance shield hole-entering double-air-bag sealing device as claimed in claim 1, further comprising a ring of sponge arranged outside the side baffle.
8. A deep-buried earth pressure balance shield tunnel entrance sealing method is characterized by comprising the following steps:
installing the deep-buried earth pressure balance shield hole-entering double-airbag sealing device according to any one of claims 1 to 7 into a hole through the hole ring before the shield hole-entering;
filling and expanding the high-pressure rubber air bag for the first time before the shield enters the tunnel ring, and filling a gap between the shield and the tunnel ring by using the high-pressure rubber air bag when the shield enters the tunnel ring;
and after the shield continues to be pushed forward and leaves the hole ring, performing secondary filling expansion on the high-pressure rubber air bag, and filling a gap between the tunnel segment and the hole ring.
9. The method for sealing the entry of the deep-buried earth pressure balance shield according to claim 8, wherein the high-pressure rubber air bags filled and expanded for the first time and the high-pressure rubber air bags filled and expanded for the second time are different, and the high-pressure rubber air bags filled and expanded for the first time are positioned in front of the shield advance than the high-pressure rubber air bags filled and expanded for the second time.
10. The method for sealing the buried earth pressure balance shield hole according to claim 8, wherein each high-pressure rubber air bag comprises two arc-shaped air bags arranged in an annular shape and two spare air bags corresponding to the two arc-shaped air bags, and when one of the two arc-shaped air bags arranged in the annular shape cannot be used, the corresponding spare air bag is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613668.9A CN111828094B (en) | 2020-06-30 | 2020-06-30 | Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613668.9A CN111828094B (en) | 2020-06-30 | 2020-06-30 | Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof |
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| Publication Number | Publication Date |
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| CN111828094A true CN111828094A (en) | 2020-10-27 |
| CN111828094B CN111828094B (en) | 2021-10-12 |
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| CN202010613668.9A Active CN111828094B (en) | 2020-06-30 | 2020-06-30 | Deep-buried earth pressure balance shield hole-entering double-air-bag sealing device and sealing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233163A (en) * | 2021-12-13 | 2022-03-25 | 航天建筑设计研究院有限公司 | Sealing structure of clean room door body |
| CN115162410A (en) * | 2022-08-03 | 2022-10-11 | 中交第一航务工程局有限公司 | Sliding contact type pressure sealing device and application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114233163A (en) * | 2021-12-13 | 2022-03-25 | 航天建筑设计研究院有限公司 | Sealing structure of clean room door body |
| CN115162410A (en) * | 2022-08-03 | 2022-10-11 | 中交第一航务工程局有限公司 | Sliding contact type pressure sealing device and application |
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