CN113944193A - Expansion joint redundancy sealing device - Google Patents
Expansion joint redundancy sealing device Download PDFInfo
- Publication number
- CN113944193A CN113944193A CN202111409714.4A CN202111409714A CN113944193A CN 113944193 A CN113944193 A CN 113944193A CN 202111409714 A CN202111409714 A CN 202111409714A CN 113944193 A CN113944193 A CN 113944193A
- Authority
- CN
- China
- Prior art keywords
- expansion joint
- embedded
- rubber
- water
- water stopping
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229920001971 elastomer Polymers 0.000 claims abstract description 45
- 229920002396 Polyurea Polymers 0.000 claims abstract description 12
- 239000000806 elastomer Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920002397 thermoplastic olefin Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
Abstract
The utility model provides a redundant sealing device of expansion joint, has solved present expansion joint can not be fine sealed, and later stage maintenance cost high problem. The embedded water-stopping device comprises a wall body, wherein an expansion joint is arranged in the wall body, and an embedded water-stopping device is embedded in the expansion joint; the embedded water stopping device comprises two layers of rubber water stopping belts which are parallel to each other, and a gap is arranged between the two rubber water stopping belts. During the maximum benefit of the device of this design, adopted extreme design theory, after the rubber waterstop stagnant water failure, inject elastomer polyurea into both clearances, just can reach the effect of stagnant water. Because the spacing of two rubber waterstops has saved the use amount of elastomer polyurea greatly, so the device sealing reliability is high, and the durability is good, and the maintenance cost is low.
Description
Technical Field
The invention relates to the technical field of expansion joint sealing, in particular to a redundant sealing device for an expansion joint.
Background
According to statistics, the leakage rate of the underground space reaches 65 percent and the leakage rate of the roof reaches 90 percent, while the leakage at the position of the expansion joint occupies a large proportion, and once the leakage occurs, the maintenance is very difficult.
To prevent leakage at the expansion joint, a rubber water stop of a medium-buried type is usually installed at the position as shown in fig. 1, and theoretically, the rubber water stop is used to prevent the entry of external water, but in fact, a good waterproof effect cannot be achieved for the following reasons: 1. the building concrete is that the rubber water stop strip often floats and then drifts away from the original position; 2. the expansion water stop rod expands when meeting water, and after the concrete is hardened, the rubber is in a free state and is not compressed or restrained, and the sealing specific pressure is not established; 3. at low temperature, the rubber shrinks, and a water seepage channel is formed between the water stop strip and the concrete.
Once leaking, the common method of repair is to inject an elastic material into the hole drilled behind the water stop, but because the back of the water stop is often a cavity or a soil mass. If so, most of the injected elastic material enters the ground behind, causing high maintenance cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a redundant sealing device for an expansion joint, and effectively solves the problems that the existing expansion joint cannot be well sealed, and the later maintenance cost is high.
The invention is realized by the following technical scheme: a redundant sealing device for an expansion joint comprises a wall body, wherein the expansion joint is arranged in the wall body, and an embedded water stopping device is embedded in the expansion joint;
the embedded water stopping device comprises two layers of rubber water stopping belts which are parallel to each other, and a gap is formed between the two rubber water stopping belts;
the lower rubber waterstop is connected with a grouting pipe.
Preferably, elastomer polyurea is injected between the two layers of the rubber water stop belts.
Preferably, an externally attached water stop is fixed at the upper end of the expansion joint.
A construction method of a redundant sealing device for an expansion joint comprises the following steps: s1, arranging embedded grooves on two sides of the expansion joint, placing the embedded water stopping device in the embedded grooves, and fixing the embedded water stopping device;
s2, fixing an externally attached water stop at the top of the expansion joint;
and S3, injecting elastomer polyurea between the two layers of rubber water stops.
During the maximum benefit of the device of this design, adopted extreme design theory, after the rubber waterstop stagnant water failure, inject elastomer polyurea into both clearances, just can reach the effect of stagnant water. Because the spacing of two rubber waterstops has saved the use amount of elastomer polyurea greatly, so the device sealing reliability is high, and the durability is good, and the maintenance cost is low.
Drawings
FIG. 1 is a schematic view of a sealing structure for an expansion joint according to the prior art;
FIG. 2 is a schematic view of the overall structure of the present invention;
wherein: 1. a wall body; 2. a rubber waterstop; 3. a grouting pipe; 4. an elastomeric polyurea; 5. an externally-attached water stop.
Detailed Description
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a redundant sealing device for expansion joints includes a wall 1, an expansion joint is disposed in the wall 1, and an embedded water stop device is embedded in the expansion joint;
the embedded water stopping device comprises two layers of rubber water stopping belts 2 which are parallel to each other, and a gap is arranged between the two rubber water stopping belts 2;
the lower rubber waterstop 2 is connected with a grouting pipe 3.
Since the rubber has the problem of low-temperature shrinkage and hardening, and the leakage is inevitable, the rubber water stop 2 is defaulted as a limiting device, and the device structure of the invention is designed.
And an elastomer polyurea 4 is injected between the two layers of the rubber water stop belts 2.
An externally-attached water stop is fixed at the upper end of the expansion joint.
When concrete pouring construction is carried out, two rubber water stops 2 are arranged, after concrete pouring is finished, before overall delivery is checked and accepted, elastomer polyurea 4 is injected between the two rubber water stops 2, and the material is low-temperature resistant, strong in binding force with a damp concrete base surface and slightly expandable.
A construction method of a redundant sealing device for an expansion joint comprises the following steps: s1, arranging embedded grooves on two sides of the expansion joint, placing the embedded water stopping device in the embedded grooves, and fixing the embedded water stopping device;
s2, fixing an externally attached water stop 5 at the top of the expansion joint;
and S3, injecting elastomer polyurea 4 between the two layers of rubber water stops 2.
Our patent is based on a summary of practical experience: the common expansion water stop strip certainly leaks water due to shrinkage, and the later maintenance is difficult to treat because the cavity behind the water stop strip is large, and sealing slurry is particularly wasted for filling. Two rubber water stops 2 are arranged, once the rubber water stops 2 shrink and leak, sealing slurry (modified polyurethane) which is good in low-temperature flexibility and capable of being bonded with concrete can be injected into a limited space formed by the two rubber water stops 2, maintenance is convenient, and materials are saved.
Meanwhile, the externally-adhered water stop belt is a modified TPO (thermoplastic polyolefin) adhesive tape adopting single-sided hot-melt fibers, the low-temperature resistance is good, the elongation rate reaches 900%, and the displacement change is met to the maximum extent. The single-sided fiber and the concrete base surface are bonded through an inorganic cementing material and a physical anchoring method to form a seal and increase a permeation path.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. A redundant sealing device for an expansion joint comprises a wall body (1), wherein the expansion joint is arranged in the wall body (1), and an embedded water stopping device is embedded in the expansion joint; it is characterized in that the preparation method is characterized in that,
the embedded water stopping device comprises two layers of rubber water stopping belts (2) which are parallel to each other, and a gap is formed between the two rubber water stopping belts (2);
the rubber waterstop (2) on the lower layer is connected with a grouting pipe (3).
2. The redundant sealing device for expansion joints according to claim 1, characterized in that elastomer polyurea (4) is injected between two layers of the rubber water stop (2).
3. The redundant sealing device for an expansion joint as claimed in claim 1, wherein an external water stop is fixed at the upper end of the expansion joint.
4. The construction method of the expansion joint redundant sealing device of claim 3, comprising the following steps: s1, arranging embedded grooves on two sides of the expansion joint, placing the embedded water stopping device in the embedded grooves, and fixing the embedded water stopping device;
s2, fixing an externally attached water stop (5) at the top of the expansion joint;
s3, injecting elastomer polyurea (4) between the two layers of rubber water stops (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409714.4A CN113944193A (en) | 2021-11-19 | 2021-11-19 | Expansion joint redundancy sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409714.4A CN113944193A (en) | 2021-11-19 | 2021-11-19 | Expansion joint redundancy sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113944193A true CN113944193A (en) | 2022-01-18 |
Family
ID=79338701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111409714.4A Pending CN113944193A (en) | 2021-11-19 | 2021-11-19 | Expansion joint redundancy sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113944193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960897A (en) * | 2022-03-25 | 2022-08-30 | 中国一冶集团有限公司 | Anti-leakage ditch splicing seam structure, drainage ditch applying same and maintenance method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854021A (en) * | 1981-09-28 | 1983-03-30 | Teijin Ltd | Surface modifying method of fiber |
| CN103603317A (en) * | 2013-12-11 | 2014-02-26 | 国家电网公司 | Water-stopping and leakage-prevention method for expansion joint of high-head water retaining structure |
| CN105220713A (en) * | 2015-10-27 | 2016-01-06 | 中国建筑第八工程局有限公司 | The waterproof construction of outer wall of basement settlement joint |
| CN105297782A (en) * | 2015-11-19 | 2016-02-03 | 东南大学 | Underground concrete structure expansion joint treatment structure and construction method thereof |
| CN107345406A (en) * | 2017-08-14 | 2017-11-14 | 洛阳双瑞特种装备有限公司 | A kind of method for the sealing of piping lane waterproofing of movement joints |
| CN208533743U (en) * | 2018-07-06 | 2019-02-22 | 珠海华兴防水科技有限公司 | Assembled self-adhering rubber waterstop |
| CN209958531U (en) * | 2018-12-29 | 2020-01-17 | 湖北大工防水科技有限公司 | Deformation joint leakage repairing structure |
-
2021
- 2021-11-19 CN CN202111409714.4A patent/CN113944193A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854021A (en) * | 1981-09-28 | 1983-03-30 | Teijin Ltd | Surface modifying method of fiber |
| CN103603317A (en) * | 2013-12-11 | 2014-02-26 | 国家电网公司 | Water-stopping and leakage-prevention method for expansion joint of high-head water retaining structure |
| CN105220713A (en) * | 2015-10-27 | 2016-01-06 | 中国建筑第八工程局有限公司 | The waterproof construction of outer wall of basement settlement joint |
| CN105297782A (en) * | 2015-11-19 | 2016-02-03 | 东南大学 | Underground concrete structure expansion joint treatment structure and construction method thereof |
| CN107345406A (en) * | 2017-08-14 | 2017-11-14 | 洛阳双瑞特种装备有限公司 | A kind of method for the sealing of piping lane waterproofing of movement joints |
| CN208533743U (en) * | 2018-07-06 | 2019-02-22 | 珠海华兴防水科技有限公司 | Assembled self-adhering rubber waterstop |
| CN209958531U (en) * | 2018-12-29 | 2020-01-17 | 湖北大工防水科技有限公司 | Deformation joint leakage repairing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960897A (en) * | 2022-03-25 | 2022-08-30 | 中国一冶集团有限公司 | Anti-leakage ditch splicing seam structure, drainage ditch applying same and maintenance method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220118 |
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| RJ01 | Rejection of invention patent application after publication |