CN112343625B - Joint sealing gasket - Google Patents
Joint sealing gasket Download PDFInfo
- Publication number
- CN112343625B CN112343625B CN202011397731.6A CN202011397731A CN112343625B CN 112343625 B CN112343625 B CN 112343625B CN 202011397731 A CN202011397731 A CN 202011397731A CN 112343625 B CN112343625 B CN 112343625B
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- CN
- China
- Prior art keywords
- sealing gasket
- groove
- polyurethane
- gasket body
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 60
- 229920002635 polyurethane Polymers 0.000 claims abstract description 32
- 239000004814 polyurethane Substances 0.000 claims abstract description 32
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D11/385—Sealing means positioned between adjacent lining members
- E21D11/386—Sealing means positioned between adjacent lining members inflatable sealing means
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Gasket Seals (AREA)
Abstract
The invention provides a joint sealing gasket which comprises a sealing gasket body, wherein the sealing gasket body comprises an outer sealing gasket body and an inner sealing gasket body, a sealing gasket groove is formed in one end of the sealing gasket body, a polyurethane groove is formed in the other end, opposite to the sealing gasket groove, of the sealing gasket body, a plurality of grooves are formed in the bottom of the polyurethane groove, a plurality of holes are formed in the bottoms of the grooves in two ends at equal intervals, a through groove is communicated among free ends of the holes in the same side, and high-density water-swelling polyurethane is filled in the polyurethane groove, the grooves, the holes and the through groove. The high-density water-swellable polyurethane is adopted, so that the problems of easy precipitation, aging and the like of water-swellable rubber in the traditional sealing gasket can be effectively solved. The long-term waterproof performance of the sealing gasket is ensured. The high-density water-swellable polyurethane and the porous ethylene propylene diene monomer are connected in an antenna type occlusion mode, and the grooves are provided with holes to form a rivet-like mode, so that the bonding force between the high-density water-swellable polyurethane and the porous ethylene propylene diene monomer is greatly enhanced.
Description
Technical Field
The invention belongs to the field of civil engineering tunnels, and particularly relates to a joint sealing gasket.
Background
At present, the waterproof of the joints of shield segments at home and abroad mainly adopts an elastic sealing gasket for waterproofing. The elastic sealing gasket commonly used in domestic related projects is mainly formed by combining porous ethylene propylene diene monomer rubber and water-swellable rubber. The waterproof principle is as follows: through the compaction of the duct piece, the ethylene propylene diene monomer rubber is compressed under stress and the water-swellable rubber swells in the presence of water to fill the joint, so that the sealing and waterproof functions are realized.
The traditional sealing gasket is formed by combining water-swelling rubber and porous ethylene propylene diene monomer, but the water-swelling rubber is easy to have the problems of precipitation, aging, expansion rate reduction and the like under the long-term compression action due to the self-characteristic limitation. And the traditional water-swelling water-stopping rubber is generally only simply embedded at the top of the ethylene propylene diene monomer rubber, so that the water-swelling rubber and the porous ethylene propylene diene monomer rubber can be separated in the extrusion and assembly process of the shield segment, and the waterproof performance of the segment sealing gasket is reduced under long-term working conditions.
Disclosure of Invention
The invention aims to provide a joint sealing gasket, which is particularly suitable for solving the problems that under the long-term compression action of a shield elastic sealing gasket, water-swelling water-stopping rubber is easy to separate out, age and reduce expansion multiplying power, and the water-swelling water-stopping rubber and porous ethylene propylene diene monomer are possibly separated under the extrusion action of shield segments.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a joint sealing gasket, including sealed the pad body, sealed the pad body includes outside sealed pad body and inboard sealed pad body, sealed pad body one end is provided with sealed pad slot, the other end that sealed pad body is relative with sealed pad slot is provided with the polyurethane groove, polyurethane tank bottom is provided with a plurality of recesses, the equal equidistance in recess bottom at both ends is provided with a plurality of holes, the intercommunication is provided with a logical groove between the free end of each hole of homonymy, the polyurethane groove, a groove, all fill in hole and the logical inslot and be provided with water inflation polyurethane of high density.
Furthermore, there are three groups of sealing gasket grooves at the bottom of the outer sealing gasket body, and two groups of sealing gasket grooves at the bottom of the inner sealing gasket body.
Furthermore, the part of the high-density water-swelling polyurethane in the groove forms an antenna, and the antenna is in antenna-type occlusion connection with the inner wall of the groove.
Furthermore, the polyurethane groove is a through dovetail groove.
Furthermore, the sealing gasket body is made of ethylene propylene diene monomer.
Furthermore, a plurality of extrusion through holes are formed in the sealing gasket body.
Furthermore, the sealing pad body and the high-density water-swelling polyurethane are vulcanized and formed at one time synchronously.
In the use, when the user installed outside gasket body or inboard gasket body in sealed position, the local extrusion that forms caused the extrusion through-hole to take place deformation, guaranteed sealed effect.
The invention has the advantages and positive effects that: due to the adoption of the technical scheme, the high-density water-swelling polyurethane can effectively solve the problems of precipitation, aging and the like of water-swelling rubber in the traditional sealing gasket. The long-term waterproof performance of the sealing gasket is ensured. High density water-swelling polyurethane and porous type EPDM adopt antenna formula interlock to be connected to set up the trompil in groove, form the form of similar rivet, strengthened the adhesion between the two greatly, can effectively avoid because the sealed problem of filling up two kinds of structure separation that lead to of section of jurisdiction extrusion, guaranteed the waterproof construction quality in tunnel.
Drawings
FIG. 1 is a schematic elevational view of the outboard gasket of the present invention;
FIG. 2 is a front view of the inner gasket of the joint of the present invention;
FIG. 3 is a schematic top view of the outboard gasket of the present invention.
In the figure:
1. outer side gasket body 2, inner side gasket body 3, gasket groove
4. Polyurethane groove 5, groove 6 and hole
7. Through groove 8, high-density water-swelling polyurethane 9 and antenna
10. Extrusion through hole
Detailed Description
As shown in fig. 1-3, the invention relates to a joint sealing gasket, which comprises a sealing gasket body, wherein the sealing gasket body comprises an outer sealing gasket body 1 and an inner sealing gasket body 2, a sealing gasket groove 3 is arranged at one end of the sealing gasket body, a polyurethane groove 4 is arranged at the other end of the sealing gasket body opposite to the sealing gasket groove 3, a plurality of grooves 5 are arranged at the bottom of the polyurethane groove 4, a plurality of holes 6 are arranged at the bottoms of the grooves 5 at two ends at equal intervals, a through groove 7 is communicated between free ends of the holes 6 at the same side, and high-density water-swelling polyurethane 8 is filled in the polyurethane groove 4, the grooves 5, the holes 6 and the through groove 7.
Further, there are three sets of gasket grooves 3 in the bottom of the outer gasket body 1, and two sets of gasket grooves 3 in the bottom of the inner gasket body 2.
Furthermore, the part of the high-density water-swellable polyurethane 8 in the groove 5 forms an antenna 9, and the antenna 9 is in antenna-type snap connection with the inner wall of the groove 5.
Further, the polyurethane groove 4 is a through-type dovetail groove.
Furthermore, the sealing gasket body is made of ethylene propylene diene monomer.
Further, a plurality of extrusion through holes 10 are arranged on the sealing gasket body.
Further, the sealing pad body and the high-density water-swellable polyurethane 8 are vulcanized and formed at one time synchronously.
In the use, when the user installed outside gasket body 1 or inboard gasket body 2 in sealed position, the local extrusion that forms caused extrusion through-hole 10 to take place deformation, guaranteed sealed effect.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A joint sealing gasket comprises a sealing gasket body and is characterized in that: the sealing gasket body comprises an outer sealing gasket body (1) and an inner side sealing gasket body (2), wherein one end of the sealing gasket body is provided with a sealing gasket groove (3), the sealing gasket body is provided with a polyurethane groove (4) at the other end opposite to the sealing gasket groove (3), a plurality of grooves (5) are arranged at the bottom of the polyurethane groove (4), and two ends of the sealing gasket body are respectively provided with a plurality of holes (6) and one side of the same groove (7) which is communicated with the free ends of the holes (6) and is provided with a through groove (7), the polyurethane groove (4) is provided with a groove (5), the holes (6) and the through groove (7) are filled with high-density water-swelling polyurethane (8).
2. The joint gasket of claim 1, wherein: the sealing gasket groove (3) at the bottom of the outer sealing gasket body (1) is provided with three groups, and the sealing gasket groove (3) at the bottom of the inner sealing gasket body (2) is provided with two groups.
3. The joint gasket of claim 1, wherein: high density water-swellable polyurethane (8) are located antenna (9) is formed to the part in recess (5), antenna (9) with recess (5) inner wall is antenna formula interlock connection.
4. The joint gasket of claim 1, wherein: the polyurethane groove (4) is a through dovetail groove.
5. The joint gasket of claim 1, wherein: the sealing gasket body is made of ethylene propylene diene monomer.
6. The joint gasket of claim 1, wherein: the sealing gasket body is provided with a plurality of extrusion through holes (10).
7. The joint gasket of claim 1, wherein: the sealing pad body and the high-density water-swelling polyurethane (8) are vulcanized and formed at one time synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011397731.6A CN112343625B (en) | 2020-12-03 | 2020-12-03 | Joint sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011397731.6A CN112343625B (en) | 2020-12-03 | 2020-12-03 | Joint sealing gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112343625A CN112343625A (en) | 2021-02-09 |
| CN112343625B true CN112343625B (en) | 2022-04-01 |
Family
ID=74428140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011397731.6A Active CN112343625B (en) | 2020-12-03 | 2020-12-03 | Joint sealing gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112343625B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202505B (en) * | 2021-05-29 | 2024-04-05 | 浙江神州科技化工有限公司 | Subway segment gap sealing construction process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204646271U (en) * | 2015-05-11 | 2015-09-16 | 北京惠诚基业工程技术有限责任公司 | The concrete prefabricated assembly of water-tight |
| CN205893854U (en) * | 2016-07-05 | 2017-01-18 | 上海浦东公路养护建设有限公司 | Concrete pavement joint structure |
| CN206530345U (en) * | 2017-02-28 | 2017-09-29 | 中铁二院工程集团有限责任公司 | A kind of jacking pipe joints seam construction |
| CN210033476U (en) * | 2019-03-18 | 2020-02-07 | 上海市隧道工程轨道交通设计研究院 | Waterproof structure for shield tunnel segment joint |
-
2020
- 2020-12-03 CN CN202011397731.6A patent/CN112343625B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204646271U (en) * | 2015-05-11 | 2015-09-16 | 北京惠诚基业工程技术有限责任公司 | The concrete prefabricated assembly of water-tight |
| CN205893854U (en) * | 2016-07-05 | 2017-01-18 | 上海浦东公路养护建设有限公司 | Concrete pavement joint structure |
| CN206530345U (en) * | 2017-02-28 | 2017-09-29 | 中铁二院工程集团有限责任公司 | A kind of jacking pipe joints seam construction |
| CN210033476U (en) * | 2019-03-18 | 2020-02-07 | 上海市隧道工程轨道交通设计研究院 | Waterproof structure for shield tunnel segment joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112343625A (en) | 2021-02-09 |
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