CN108222972B - Double-airbag type end sealing device for tunnel secondary lining construction - Google Patents
Double-airbag type end sealing device for tunnel secondary lining construction Download PDFInfo
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- CN108222972B CN108222972B CN201810197157.6A CN201810197157A CN108222972B CN 108222972 B CN108222972 B CN 108222972B CN 201810197157 A CN201810197157 A CN 201810197157A CN 108222972 B CN108222972 B CN 108222972B
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000004323 axial length Effects 0.000 claims abstract description 12
- 239000013013 elastic material Substances 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 58
- 230000002787 reinforcement Effects 0.000 description 21
- 239000011435 rock Substances 0.000 description 18
- 239000004567 concrete Substances 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 230000007306 turnover Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a tunnel secondary lining construction double-airbag formula end-capping device, it includes the extension drum, a plurality of bracing pieces, two annular gasbags, a plurality of blocking lever, the bracing piece, the quantity of blocking lever is the same, the length of bracing piece is not less than the axial length of extension drum, the bracing piece is established at its inner wall and circumference mutual interval along the axial of extension drum, set for the axis direction of two gasbags to be the fore-and-aft direction, the fore-and-aft width of two gasbags is the same and the width is greater than the axial length of extension drum, the material of every gasbag is elastic material, the front side of every gasbag is equipped with the air cock, the inside and outside telescopic connection of two gasbags, the gasbag suit of inboard is on the extension drum, the front end of every bracing piece all meets near the inboard of extension drum axis region with a blocking lever, the outside that every blocking lever kept away from extension drum axis region contacts with the front side of two gasbags. The device is assembled on the trolley, so that the construction efficiency can be effectively improved, and the end sealing effect of the secondary lining construction of the tunnel is better.
Description
Technical Field
The invention relates to the field of tunnel engineering construction equipment, in particular to a double-airbag type end sealing device for tunnel secondary lining construction.
Background
At present, a new Olympic method is generally adopted for tunnel construction in hydraulic engineering, and single-layer lining or combined lining is needed according to surrounding rock types and bearing conditions of a tunnel body after tunnel excavation is completed. The combined lining is to cast a layer of reinforced concrete (namely secondary lining) on the inner side of the original single-layer lining (commonly called primary lining, which is formed by driving anchor rods into surrounding rock, hanging reinforcing steel meshes and then spraying a layer of concrete) along the circumferential direction.
Along with the continuous development of equipment manufacturing industry in China, a full-circle needle beam type steel mould trolley (hereinafter, simply referred to as trolley) mould construction method is generally adopted for secondary lining construction of full-circle section and pressure tunnels, and a circumferential outer frame of the trolley comprises a circular mould cylinder (formed by bending and enclosing a steel plate with the thickness of 8-10 mm) and a reinforcing frame (formed by connecting channel steel, I-steel and the like) arranged on the inner wall of the mould cylinder.
In order to prevent the water seepage of surrounding rocks, the construction joint of two adjacent molds for secondary lining construction is designed to be sealed by adopting a water stop ring with annular and flat strip-shaped cross section so as to prevent the water seepage of the surrounding rocks, the water stop ring is formed by enclosing a buried rubber water stop belt, and the width of the water stop belt is 230-500 mm.
The following defects exist in the implementation of secondary lining construction of tunnels by using a trolley: the front end of each lining section cannot be plugged quickly and conveniently, the problem of slurry leakage easily occurs during plugging, the construction efficiency is low, the number of workers is large, the consumption of turnover materials is large, and the water stopping effect is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing the double-airbag type end sealing device for the secondary lining construction of the tunnel, which is assembled on the trolley, so that the construction efficiency can be effectively improved, and the end sealing effect of the secondary lining construction of the tunnel is better.
In order to solve the technical problems, the invention provides a double-airbag type end sealing device for tunnel secondary lining construction, which comprises an extension cylinder, a plurality of supporting rods, two annular airbags and a plurality of blocking rods, wherein the number of the supporting rods and the number of the blocking rods are the same, the length of each supporting rod is not smaller than the axial length of the extension cylinder, the supporting rods are arranged on the inner wall of the extension cylinder along the axial direction of the extension cylinder and are circumferentially spaced, the axial directions of the two airbags are set to be front-back directions, the front-back width of the two airbags is the same and is wider than the axial length of the extension cylinder, the material of each airbag is an elastic material, the front side of each airbag is provided with an air nozzle, the two airbags are connected in a sleeved mode, the inner airbag is sleeved on the extension cylinder, the front end of each supporting rod is connected with the inner side of one blocking rod close to the axial region of the extension cylinder, and the outer side of each blocking rod far away from the axial region of the extension cylinder is contacted with the front sides of the two airbags.
For the sake of simple explanation, the tunnel secondary lining construction double-airbag type end-sealing device is simply called the device.
The device is assembled on a trolley, namely: the rear end of the supporting rod is vertically connected with the front end of the reinforcing frame of the trolley, the length trend of the supporting rod is consistent with the axial direction of the molding cylinder of the trolley, and the extension cylinder is positioned at the front end of the trolley and coaxial with the molding cylinder of the trolley. The structure is simple and reasonable in design, convenient to assemble and good in connection strength;
The rear side ring body of the water stop ring is fixed on the front side of the reinforcement cage of the lining section and the position of the water stop ring is accurate, the front side ring body (namely the reserved ring body) of the water stop ring is exposed out of the front end of the lining section, but is clamped between two air bags filled with compressed air in a non-bending smooth mode (namely the front side ring body of one air bag, the front side ring body of the water stop ring and the other air bag are sequentially connected in a sleeved mode), and the blocking rod is used for positioning the two air bags (the front side of the water stop ring, the reinforcement cage and the air bag close to the inside of the tunnel is set, the rear side of the water stop ring, the reinforcement cage and the air bag far from the inside of the tunnel is set, and the front-rear width of the water stop ring is larger than the front-rear width of each air bag);
Pouring concrete into a space formed by the mould building cylinder of the trolley and the surrounding rock, and adopting two air bags as blocking parts in an integral structure form to block the front end of the lining section along the circumferential direction, wherein the two air bags are in flexible contact with the front side ring body of the water stop ring, the front side ring body of the water stop ring is not bent or damaged, the front side ring body of the water stop ring is protected, quick, convenient and stable blocking is realized (compressed air in each air bag can reach a certain pressure, proper deformation of the compressed air can adapt to an irregular surface at the front end of the lining section), the blocking structure is quite time-saving, labor-saving and labor-saving, the problem of concrete leakage does not occur, the construction efficiency is effectively improved, the consumption of turnover materials is reduced, the blocking effect is better), the outer walls of the air bags at the outer sides are tightly attached to the surrounding rock of the tunnel, and the outer ends of the blocking rods point to the surrounding rock;
after the concrete of the lining section is poured and formed, the air in the two air bags is discharged, so that the two air bags are separated from the front end of the concrete layer of the lining section, and then the blocking rod and the two air bags are removed (the front side ring body of the water stop ring exposed outside the front end of the lining section cannot deform or displace, and cannot be damaged, so that the related problems existing in the prior art are properly solved);
therefore, the device is assembled on the trolley, so that the construction efficiency can be effectively improved, and the end sealing effect of the secondary lining construction of the tunnel is better.
The section shape and the specification of the blocking rod are respectively corresponding to the same;
The front end of each supporting rod is provided with a sleeve for inserting blocking rods, the cross section shapes and the specifications of a plurality of sleeves are respectively corresponding to the same, each sleeve is provided with a fastening screw in a screwing mode, the inner side of each blocking rod is inserted into the corresponding sleeve, and each blocking rod is positioned by the fastening screw on the corresponding sleeve.
Therefore, according to the concave-convex condition of the surface of the surrounding rock, each blocking rod can move along the inside and outside of the corresponding sleeve so as to adapt to the surrounding rock with different specifications and shapes, and the construction requirements of secondary lining construction of tunnels are fully met.
The material of each air bag is made of rubber material;
The axial section of the inner air bag is square, and the axial section of the outer air bag is round or elliptical.
The rubber material is adopted, so that the wear resistance of the air bag is better, and the air bag is not easy to leak;
The different axial cross-sectional shapes of the inner and outer air bags ensure that the clamping effect of the two air bags on the front side ring body of the water stop ring and the end sealing effect on the front end of the corresponding lining section are good, and the construction joint is ensured to be straight and smooth.
Drawings
FIG. 1 is a schematic view of a structure and a construction state of a secondary lining construction of a tunnel by using a trolley provided with the device.
Fig. 2 is a partial view of fig. 1.
Fig. 3 is an enlarged cross-sectional view A-A of fig. 2.
Fig. 4 is a B-direction enlarged view of fig. 3.
FIG. 5 is a schematic view of another construction and construction state of a secondary lining construction of a tunnel using a trolley to which the present apparatus is attached.
The components in the drawings are marked as follows:
1a, an extension cylinder; 1b, supporting rods; 1c, a sleeve; 1d, fastening a screw; 2. an air bag; 2a, an air tap; 3. a blocking lever; 4. an air pressure gauge; 5. a compressor; t, a mould cylinder of the trolley; J. a reinforcing frame of the trolley; d1, a first lining section; l1, a first reinforcement cage; d2, a second lining section; l2, a second reinforcement cage; F. a construction joint; y, surrounding rock; q1, a first water stop ring; q11, a front side ring body of the first water stop ring; q12, the rear side ring body of the first water stop ring; q2, a second water stop ring; q21, the front side ring body of the second water stop ring; q22, the rear side ring body of the second water stop ring; n, inside the tunnel.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
For the sake of simplicity of explanation, the supporting rods 1b, the sleeves 1c, the fastening screws 1D, and the blocking rods 3 are not shown in fig. 1, and the concrete pouring molding construction is performed for the first lining segment D1.
Fig. 5 shows the fitted state of the surrounding rock Y, the first lining segment D1, the construction joint F, the second lining segment D2, the first water stop ring Q1, and the second water stop ring Q2 after the tunnel secondary lining construction is performed.
Referring to fig. 1-5, the device comprises an extension cylinder 1a, a plurality of support rods 1b, two annular air bags 2 and a plurality of blocking rods 3.
The number of the support bars 1b and the number of the blocking bars 3 are the same.
The length of the supporting rod 1b is equal to the axial length of the extension cylinder 1a, the supporting rods 1b are arranged on the inner wall of the extension cylinder 1a along the axial direction of the extension cylinder 1a and are circumferentially spaced, the extension cylinder 1a is formed by encircling a steel plate with the thickness of 5mm, the circumferential spacing of the supporting rods 1b is 30-50 cm, and the supporting rods 1b are 10# channel steel.
The two air bags 2 are connected in a sleeved mode, the inner air bag 2 is sleeved on the extension cylinder 1a, the axial section of the inner air bag 2 is square, and the axial section of the outer air bag 2 is circular. Setting the axial direction of the two airbags 2 as the front-rear direction, the front-rear width of the two airbags 2 being the same and the width being greater than the axial length of the extension cylinder 1a, setting the axial length of the extension cylinder 1a as C and the front-rear width of each airbag 2 as K, then C: k is 1:1.05.
The material of each air bag 2 is rubber material, and the front side of each air bag 2 is provided with an air tap 2a. During construction, the air tap 2a can be connected with the barometer 4 and the compressor 5 respectively.
The section shape and the specification of the blocking rod 3 are respectively corresponding to the same, and the blocking rod 3 adopts 8# channel steel.
The front end of each supporting rod 1b is provided with a rectangular sleeve 1c for inserting the blocking rods 3 by means of fasteners, the cross-sectional shapes and specifications of the plurality of sleeves 1c are respectively the same, the fastening screws 1d are screwed on each sleeve 1c, each blocking rod 3 is inserted into the corresponding sleeve 1c close to the inner side of the axis area of the extension cylinder 1a (namely, the front end of each supporting rod 1b is connected with the inner side of one blocking rod 3), each blocking rod 3 is positioned by the fastening screws 1d on the corresponding sleeve 1c (in this way, the blocking rods 3 are circumferentially spaced from each other), and the outer side of each blocking rod 3 far from the axis area of the extension cylinder 1a is contacted with the front sides of the two air bags 2.
Referring to fig. 1-5, the process steps and the existing corresponding advantages of the tunnel secondary lining construction implemented by adopting the trolley provided with the device are as follows:
1) A cylindrical first reinforcement cage L1 (formed by welding reinforcement bars) of a first lining section D1 (namely a first die) is built at one end of a tunnel, a trolley is moved to the first lining section D1, a circumferential gap is reserved between a die building cylinder T of the trolley and the first reinforcement cage L1, the rear end of a supporting rod 1b is vertically connected with the front end of a reinforcing frame J of the trolley, the length trend of the supporting rod 1b is consistent with the axial direction of the die building cylinder T of the trolley, an extension cylinder 1a is positioned at the front end of the trolley and coaxial with the die building cylinder T of the trolley (the structural design is simple and reasonable, the assembly is convenient, and the connection strength is better);
2) The rear side ring body Q12 of the first water stop ring Q1 is fixed on the front side of the first reinforcement cage L1 and ensures that the position is accurate, the front side ring body Q11 (namely a reserved ring body) of the first water stop ring Q1 is exposed out of the front end of the first lining section D1, but is clamped between two air bags 2 filled with compressed air in a non-bending smooth mode (namely one air bag 2, the front side ring body Q11 of the first water stop ring Q1 and the other air bag 2 are sequentially connected in a sleeved mode), and the blocking rod 3 is used for positioning the two air bags 2 (the front side of the first water stop ring Q1, the first reinforcement cage L1 and the air bag 2 close to the tunnel interior N is set, the front-back width of the first water stop ring Q1, the first reinforcement cage L1 and the air bag 2 far away from the tunnel interior N is set, and the front-back width of the first water stop ring Q1 is larger than the front-back width of each air bag 2;
3) Pouring concrete into a space formed by the molding barrel T and the surrounding rock Y, and adopting two air bags 2 as plugging components in an integral structure form, plugging the front end of the first lining section D1 along the circumferential direction, wherein the two air bags 2 are in flexible contact with the front side ring body Q11 of the first water stop ring Q1, the front side ring body Q11 of the first water stop ring Q1 is not bent or damaged, the front side ring body Q11 of the first water stop ring Q1 is protected, quick, convenient and stable end sealing is realized (the compressed air in each air bag 2 can reach a certain pressure, and proper deformation of the compressed air can be suitable for an irregular surface at the front end of the first lining section D1), the plugging structure is quite time-saving, labor-saving and labor-saving, the problem of concrete leakage does not occur, the construction efficiency is effectively improved, the consumption of turnover materials is reduced, the end sealing effect is better), the outer wall of the outer air bag 2 at the outer side is tightly adhered to the surrounding rock Y of a tunnel, and the outer end of the blocking rod 3 points to the surrounding rock Y;
4) After the concrete of the first lining segment D1 is poured and formed, the air in the two air bags 2 is discharged, so that the two air bags are separated from the front end of the concrete layer of the first lining segment D1, and then the blocking rod 3 and the two air bags 2 are removed (the front side ring body Q11 of the first water stop ring Q1 exposed outside the front end of the first lining segment D1 cannot deform or displace, and cannot damage, so that related problems existing in the prior art are properly solved);
5) Continuously building a cylindrical second reinforcement cage L2 (namely a second mould) of a second lining section D2 in the tunnel (also formed by welding reinforcement bars, wherein one side of the second reinforcement cage L2 close to the interior N of the tunnel is set to be front, and one side of the second reinforcement cage L2 far away from the interior N of the tunnel is set to be rear), the second reinforcement cage L2 is positioned at the front side of the first lining section D1 and a gap is reserved between the second reinforcement cage L2 and the first lining section D1, and a trolley is moved forwards in the tunnel to the second lining section D2, and a circumferential gap is reserved between a mould building cylinder T of the trolley and the second reinforcement cage L2;
6) Fixing the front side ring body Q11 (i.e. the reserved ring body) of the first water stop ring Q1 on the rear side of the second reinforcement cage L2 (because the front side ring body Q11 of the first water stop ring Q1 cannot deform or displace, corresponding torsional stress cannot be generated in the front side ring body Q11 of the first water stop ring Q1, and the front side ring body Q11 of the first water stop ring Q1 and the rear side of the second reinforcement cage L2 can be smoothly and smoothly fixed);
7) The rear side ring body Q22 of the second water stop ring Q2 is fixed on the front side of the second reinforcement cage L2 and the position of the rear side ring body Q22 is accurate (the structures and the specifications of the second water stop ring Q2 and the first water stop ring Q1 are respectively the same), the front side ring body Q21 of the second water stop ring Q2 is exposed out of the front end of the second lining section D2, but is clamped between two air bags 2 filled with compressed air in a non-bending smooth mode (namely, the front side ring body Q21 of one air bag 2, the front side ring body Q21 of the second water stop ring Q2 and the other air bag 2 are sequentially connected in an internal and external sleeved mode), and the blocking rod 3 is used for positioning the two air bags 2 (the side of the second water stop ring Q2 close to the inside N of a tunnel is set to be the front, and the side of the second water stop ring Q2 far away from the inside N of the tunnel is set to be the rear);
8) Pouring concrete into a space formed by the molding barrel T and the surrounding rock Y again, and adopting two air bags 2 as plugging components in an integral structure form, plugging the front end of the second lining section D2 along the circumferential direction, wherein the two air bags 2 are in flexible contact with the front side ring body Q21 of the second water stop ring Q2, the front side ring body Q21 of the second water stop ring Q2 is not bent and damaged, the front side ring body Q21 of the second water stop ring Q2 is protected, quick, convenient and stable end sealing is realized (the compressed air in each air bag 2 can reach a certain pressure, proper deformation of the compressed air can adapt to the irregular surface at the front end of the second lining section D2), the plugging structure is quite time-saving, labor-saving and labor-saving, convenient, the problem of concrete leakage does not occur, the construction efficiency is effectively improved, the consumption of turnover materials is reduced, the end sealing effect is better), the outer wall of the air bag 2 at the outer side is tightly attached to the surrounding rock Y of a tunnel, and the outer end of the blocking rod 3 points to the surrounding rock Y;
9) After the concrete of the second lining segment D2 is poured and formed, the first water stop ring Q1 is positioned in the adjacent areas of the first lining segment D1 and the second lining segment D2 and at the construction joint F (for the exposed part of the front side ring body Q11 of the first water stop ring Q1 at the construction joint F, firstly, the damage problem can not occur when two air bags 2 are adopted for end sealing, secondly, in the actual use process of the tunnel, the corresponding torsional stress can not be generated in the front side ring body Q11 of the first water stop ring Q1, so that the service life of the tunnel is prolonged, the water seepage of surrounding rock Y can be effectively prevented, and the water stop effect is better);
10 The air in the two air bags 2 is discharged again, so that the two air bags are separated from the front end of the concrete layer of the second lining section D2, the blocking rod 3 and the two air bags 2 are removed (the front side ring body Q21 of the second water stop ring Q2 exposed outside the front end of the second lining section D2 cannot deform or displace, and cannot be damaged), so that the related problems in the prior art are properly solved;
Repeating the process steps 5) -10) for a plurality of times, thereby completing the secondary lining construction of the tunnel.
In summary, the following advantages exist in the implementation of the secondary lining construction of the tunnel by adopting the trolley provided with the device: the front end of every lining section can be plugged fast and conveniently, the problem of slurry leakage can not occur during plugging, the construction efficiency is high, the number of workers is small, the consumption of turnover materials is small, and the water stopping effect is also good.
Therefore, the device is assembled on the trolley, so that the construction efficiency can be effectively improved, and the end sealing effect of the secondary lining construction of the tunnel is better.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention; modifications and equivalent substitutions are intended to be included in the scope of the claims without departing from the spirit and scope of the present invention. Such as:
the length of the support rod can also be larger than the axial length of the extension cylinder;
The front end of each supporting rod can be provided with a sleeve for inserting a blocking rod in a welding mode;
The inner extension line of each blocking rod can also intersect with the axis of the extension cylinder;
the axial section shape of the outer air bag can also be elliptical;
Setting the axial length of the extension cylinder as C and the front-back width of each air bag as K, then C: k can also be at 1: the ratio range of (1.05-1.2) is flexibly selected according to actual needs.
Claims (1)
1. Double-airbag type end sealing device for tunnel secondary lining construction is characterized in that: it comprises an extension cylinder, a plurality of support rods, two annular air bags and a plurality of blocking rods, wherein the number of the support rods and the number of the blocking rods are the same, the length of the support rods is not less than the axial length of the extension cylinder, the support rods are arranged on the inner wall of the extension cylinder along the axial direction of the extension cylinder and are circumferentially spaced,
Setting the axial direction of the two air bags as the front-back direction, wherein the front-back width of the two air bags is the same and is larger than the axial length of the extension cylinder, and the ratio of the axial length of the extension cylinder to the front-back width of each air bag is 1: 1.05, wherein the material of each air bag is an elastic material, the front side of each air bag is provided with an air tap, the inside and the outside of the two air bags are connected in a sleeved mode, the air bags on the inner side are sleeved on the extension cylinder, the front end of each supporting rod is connected with the inner side, close to the axis area of the extension cylinder, of one blocking rod, and the outer side, far away from the axis area of the extension cylinder, of each blocking rod is contacted with the front sides of the two air bags;
the section shape and the specification of the blocking rod are respectively corresponding to the same;
The front end of each supporting rod is provided with a sleeve for inserting blocking rods, the cross section shapes and the specifications of the plurality of sleeves are respectively corresponding to the same, each sleeve is provided with a fastening screw in a screwing mode, the inner side of each blocking rod is spliced with the corresponding sleeve, and each blocking rod is positioned by the fastening screw on the corresponding sleeve;
the material of each air bag is made of rubber material;
The axial section of the inner air bag is square, and the axial section of the outer air bag is round or elliptical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810197157.6A CN108222972B (en) | 2018-03-10 | 2018-03-10 | Double-airbag type end sealing device for tunnel secondary lining construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810197157.6A CN108222972B (en) | 2018-03-10 | 2018-03-10 | Double-airbag type end sealing device for tunnel secondary lining construction |
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| CN108222972A CN108222972A (en) | 2018-06-29 |
| CN108222972B true CN108222972B (en) | 2024-04-30 |
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| CN110985068B (en) * | 2019-11-27 | 2021-10-12 | 中铁隧道局集团建设有限公司 | Novel tunnel secondary lining end water-stopping sealing dual-purpose water-stopping belt |
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| JPH10280891A (en) * | 1997-03-31 | 1998-10-20 | Konoike Constr Ltd | End formwork of tunnel lining concrete |
| JP2001317297A (en) * | 2000-05-09 | 2001-11-16 | Gifu Kogyo Co Ltd | Method and device for stopping gable of concrete for tunnel lining |
| CN205135654U (en) * | 2015-11-13 | 2016-04-06 | 长安大学 | Fill exhaust formula tunnel secondary lining formworking jumbo end template |
| CN106837385A (en) * | 2017-04-07 | 2017-06-13 | 中国水利水电第五工程局有限公司 | A kind of seamless stopend for Tunnel Second Lining |
| CN207989049U (en) * | 2018-03-10 | 2018-10-19 | 安徽水利开发股份有限公司 | Tunnel Second Lining Construction double bolloon formula termination device |
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| CN108222972A (en) | 2018-06-29 |
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