CN113431608B - Prefabricated assembly type structure joint water stop strip bag structure and contact stress compensation method - Google Patents
Prefabricated assembly type structure joint water stop strip bag structure and contact stress compensation method Download PDFInfo
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- CN113431608B CN113431608B CN202110731164.1A CN202110731164A CN113431608B CN 113431608 B CN113431608 B CN 113431608B CN 202110731164 A CN202110731164 A CN 202110731164A CN 113431608 B CN113431608 B CN 113431608B
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- water
- strip bag
- bag
- bag body
- strip
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000011150 reinforced concrete Substances 0.000 claims description 16
- 229920002943 EPDM rubber Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 208000002925 dental caries Diseases 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 12
- 239000002002 slurry Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 206010023204 Joint dislocation Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011405 expansive cement Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000010959 steel Substances 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
- E21D11/38—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
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- 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)
- Lining And Supports For Tunnels (AREA)
- Sewage (AREA)
Abstract
The invention provides a novel prefabricated structural joint water stop strip bag which comprises a strip bag body and water-swellable rubber, wherein a clamping groove is formed in the side surface of the strip bag body, the water-swellable rubber is clamped in the clamping groove of the strip bag body, a large bag cavity is formed in the middle of the strip bag body, the water-swellable rubber and the large bag cavity have the same extension direction as the strip bag body, and at least one grouting pipe is communicated with the large bag cavity and used for grouting or inflating the large bag cavity as required. After the water stop strip bag is structurally assembled, the stress compensation can be carried out through grouting or inflation under the condition that the stress relaxation is reduced to generate water leakage, and the sealing effect is compensated.
Description
Technical Field
The invention relates to the field of tunnel and underground structural engineering, in particular to a novel prefabricated structure joint water stop strip bag structure and a contact stress compensation method.
Background
The prefabricated assembly type technology of the tunnel and the underground engineering is mainly applied to shield method tunnels, immersed tube tunnels, prefabricated comprehensive pipe galleries, assembled subway stations and assembled underground diaphragm wall engineering. The assembly type underground structure joint is a weak link of the structure, and water leakage is easy to occur at the joint in a water-rich area. In the prior art, the purpose of sealing and stopping water of a joint is achieved mainly by adopting the extrusion deformation of ethylene propylene diene monomer.
In the long-term use process of the assembled underground structure, joint dislocation and opening increase can occur, so that the extrusion stress of the ethylene propylene diene monomer rubber at the joint is reduced; moreover, the ethylene propylene diene monomer rubber can generate stress relaxation phenomenon under the long-term extrusion state, so that the extrusion stress of the joint is reduced. These factors can lead to gasket failure and water leakage at the joints.
Therefore, it is necessary to find a sealing water stop pad capable of compensating the extrusion stress to solve the above problems.
Disclosure of Invention
In order to overcome the defects of the existing rubber water stop strip, the invention synthesizes a novel prefabricated structure joint water stop strip bag structure and a contact stress compensation method, which can compensate the stress through grouting or inflation under the condition that the stress relaxation is reduced to generate water leakage and compensate the sealing effect.
The invention firstly provides a novel prefabricated structural joint water stop strip bag which comprises a strip bag body and water-swellable rubber, wherein a clamping groove is formed in the side surface of the strip bag body, the water-swellable rubber is clamped in the clamping groove of the strip bag body, a large bag cavity is formed in the middle of the strip bag body, the water-swellable rubber and the large bag cavity have the same extension direction as the strip bag body, and at least one grouting pipe is communicated with the large bag cavity and used for grouting or inflating the large bag cavity as required.
Wherein, meet water inflation rubber cross-section and be trapezoidal, trapezoidal base is equipped with at least one arch.
A plurality of small cavities are further formed between the water-swelling rubber and the large bag cavity, and the small cavities also have the same extending direction with the strip bag body.
The cross-section of strip bag body is down trapezoidal, meet water inflation rubber and be located the extension face at a longer parallel edge place on the cross-section, the cross-section of big bag chamber is the platykurtic and is parallel to each other with a set of parallel edge of falling trapezoidal.
The strip bag body is made of ethylene propylene diene monomer, the water-swellable rubber is P Z product type water-swellable rubber, and the water-swellable rubber is preferably PZ-400 type.
Wherein, the extending direction of the strip capsule body is in a straight line shape, a four-side frame shape or a three-side frame shape.
The grouting pipe is connected with the strip bag body through vulcanization and plastic compression, and is arranged at the end part or the middle part of the strip bag body.
The invention also provides an assembly structure of the novel prefabricated structure joint water stop strip bag, wherein reserved grooves are formed in the reinforced concrete structures on two sides of the joint at the joint of the reinforced concrete structures, the novel prefabricated structure joint water stop strip bag is oppositely arranged in the reserved grooves on two sides of the joint, and a grouting pipe of the water stop strip bag penetrates through the reinforced concrete structure on one side of the water stop strip bag and extends out of the empty side wall of the reinforced concrete structure.
The invention also provides a contact stress compensation method of the novel prefabricated structure joint water stop strip bag structure, the water stop strip bag is assembled according to the assembly structure, under the condition of requirement, grouting or inflation is carried out in the large bag cavity by using the grouting pipe, and a grouting opening at the near empty end of the grouting pipe is sealed after grouting or inflation is finished.
Compared with the prior art, the sealing water-stopping structure has the advantages that the structure is stable, the structural adaptability is good, the increased value of the joint contact sealing pressure can be controlled by controlling grouting or inflation pressure according to needs during the use, the stress relaxation or long-term stress loss during the use of the water-stopping strip bag structure is compensated, the sealing water-stopping function of the prefabricated structure is realized, the sealing water-stopping reliability is improved, and the long-term effectiveness of sealing water-stopping is maintained.
Drawings
FIG. 1 is a schematic cross-sectional view and installation view of a novel prefabricated structural joint sealing-up water-bar bag of the present invention;
FIG. 2 is a cross-sectional view of a linear water stop bladder;
FIG. 3 is a view showing a grouting nozzle installed in the middle of a bag body;
FIG. 4 is a four-sided framed waterstop bladder structure;
FIG. 5 is a three-sided frame-shaped waterstop bladder structure;
FIG. 6 is a schematic view of the novel prefabricated structural joint water stop strip bag installed at the joint of the prefabricated section;
FIG. 7 is a schematic view of compensating stress by grouting into a large cavity using a grouting pipe.
Wherein:
1. strip bag body
2. Water-swellable rubber
3. Big sacculus cavity
4. Grouting pipe
5. Reinforced concrete structure on one side of joint
6. Reserved groove
7. Reinforced concrete structure joint
8. Reinforced concrete structure faces empty lateral wall
9. Grouting nozzle
10. Reinforced concrete structure on other side of joint
11. Grouting body
12. Projection
13. A small cavity.
Detailed Description
For a better understanding of the present invention, the following detailed description is given in conjunction with specific examples. Technical terms used in the following description have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs.
As shown in fig. 1, the invention firstly provides a novel prefabricated seam sealing-up strip bag with a structure, which comprises a strip bag body 1 and water-swellable rubber 2, wherein a clamping groove is formed in the side surface of the strip bag body 1, the water-swellable rubber 2 is clamped in the clamping groove of the strip bag body 1, a big bag cavity 3 is formed in the middle of the strip bag body 1, the water-swellable rubber 2 and the big bag cavity 3 have the same extension direction as the strip bag body 1, and at least one grouting pipe 4 is communicated in the big bag cavity 3 and used for grouting or inflating the big bag cavity 3 as required.
In some embodiments, the cross section of the water-swellable rubber 2 is trapezoidal, at least one protrusion 12 is arranged on the bottom side of the trapezoid, and the design of the protrusions 12 on the cross section and the bottom side can enable the water-swellable rubber 2 to be stably clamped on the strip bag body 1, so that the phenomenon that the water-swellable rubber 2 is clamped unstably due to water deformation, structural deformation of the strip bag body 1, stress change or the like is avoided.
In some embodiments, a plurality of small cavities 13 are further opened between the water-swellable rubber 2 and the large bag cavity 3, and the small cavities 13 also have the same extending direction as the strip bag body 1. The large capsule cavity 3 is basically closed under the extrusion of external force in the later-stage precast block assembling process. The small cavity 13 can adjust the stress adjustment of the strip capsule body 1 in the extrusion process, so that the uniform extrusion force of the whole contact surface is achieved, and a waterproof path is increased. The size and number of the small cavities 13 can be adjusted according to design requirements to achieve optimal arrangement. In the later stage grouting process, the large bag cavity 3 can smoothly inject slurry under the condition that the grouting pressure exceeds the joint extrusion stress.
In some embodiments, the cross-section of strip bag body 1 is trapezoidal, meet water inflation rubber 2 and be located the extension face at longer one parallel edge place on the cross-section, big bag chamber 3's cross-section is the platykurtic and is parallel to each other with a set of parallel edge of trapezoidal, and big bag chamber 3's flat design does benefit to and bears deformation extrusion stress at later stage precast block assembly in-process, improves the construction adaptability of sealing rod bag.
In some embodiments, ethylene propylene diene monomer is used for the bladder body 1, and the preferred performance index parameters are shown in table 1, and the water-swellable rubber 2 is a water-swellable rubber of a PZ product type, more preferably a PZ-400 type, and the performance index parameters are shown in table 2.
TABLE 1
TABLE 2
In some embodiments, as shown in fig. 2 to 5, the extending direction of the bag body 1 may be designed to be a straight line shape, a quadrangular frame shape, a trilateral frame shape, etc., as required, and the specific extending route is not limited.
In some embodiments, the grouting pipe 4 is connected with the strip bag body 1 through vulcanization molding, the connection part is not easy to damage, the flexible connection can be kept in the wall body for a long time, and the grouting pipe 4 can be arranged at the end part of the strip bag body 1 or the middle part of the strip bag body 1.
The invention also provides an assembly structure of the novel prefabricated structure joint water stop strip bag, as shown in fig. 6, reserved grooves 6 are formed in reinforced concrete structures on two sides of a joint at a joint 7 of a reinforced concrete structure, the novel prefabricated structure joint water stop strip bag is oppositely arranged in the reserved grooves 6 on two sides of the joint, a grouting pipe 4 of the water stop strip bag penetrates through the reinforced concrete structure on one side where the novel prefabricated structure joint water stop strip bag is located and extends out of a near-empty side wall 8 of the reinforced concrete structure, the end part of the grouting pipe 4 can be connected with a grouting nozzle 9 when needed, and the type of the grouting nozzle 9 can be but is not limited to a high-pressure water stop needle (plastic, steel or aluminum).
The invention also provides a contact stress compensation method of the novel prefabricated structure joint water stop strip bag structure, as shown in figure 7, the water stop strip bag is assembled according to the assembly structure, after construction or during use, under the condition that the expansion amount of the structure joint is increased or the extrusion stress of the sealing gasket is reduced due to stress relaxation to generate water leakage, grouting or inflating is carried out in the large bag cavity 3 by using the grouting pipe 4, and a grouting opening at the near empty end of the grouting pipe 4 is sealed after grouting or inflating is finished, so that the extrusion contact force between the sealing strip bags or between the sealing strip bags and the prefabricated concrete is increased, and the stress compensation of the water stop strip bags is realized. The grout 11 may be, but is not limited to, an organic or inorganic slurry such as a micro-expansive cement slurry, an epoxy resin slurry, a two-or multi-component polyurethane slurry, or the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A prefabricated structure seam water stop strip bag comprises a strip bag body (1) and water-swelling rubber (2), wherein a clamping groove is formed in the side face of the strip bag body (1), the water-swelling rubber (2) is clamped in the clamping groove of the strip bag body (1), a big bag cavity (3) is formed in the middle of the strip bag body (1), the water-swelling rubber (2) and the big bag cavity (3) have the same extending direction as the strip bag body (1), and at least one grouting pipe (4) is communicated in the big bag cavity (3) and used for grouting or inflating the big bag cavity (3) under the condition of need;
still seted up a plurality of little cavitys (13) between water-swelling rubber (2) and big bag chamber (3), little cavity (13) also have with the same extending direction of strip bag body (1).
2. The prefabricated assembled structural joint sealing water-stop bag according to claim 1, wherein the cross section of the water-swellable rubber (2) is trapezoidal, and at least one protrusion (12) is arranged on the bottom edge of the trapezoid.
3. The prefabricated assembled structure seam sealing water bar bag according to claim 1, wherein the cross section of the water bar bag body (1) is in an inverted trapezoid shape, the water-swellable rubber (2) is located on an extension plane where a longer parallel side is located on the cross section, and the cross section of the large bag cavity (3) is in a flat shape and is parallel to a group of parallel sides of the inverted trapezoid shape.
4. The prefabricated assembled structural joint sealing water rod bag according to claim 1, wherein the bag body (1) is made of ethylene propylene diene monomer rubber, and the water-swellable rubber (2) is made of P Z product type water-swellable rubber.
5. The prefabricated assembled structural joint sealing water-stop bag according to claim 4, wherein the water-swellable rubber (2) is a PZ-400 type water-swellable rubber.
6. The prefabricated structural joint sealing strip bag according to claim 1, wherein the extending direction of the strip bag body (1) is a straight line shape, a quadrangular frame shape or a trilateral frame shape.
7. The prefabricated assembled structural joint sealing strip bag according to claim 1, wherein the grouting pipe (4) is connected with the strip bag body (1) through vulcanization and plastic compression, and the grouting pipe (4) is installed at the end part or the middle part of the strip bag body (1).
8. An assembly structure of a prefabricated structure joint water stop strip bag, wherein a reserved groove (6) is formed in a reinforced concrete structure on two sides of a joint at the joint (7) of the reinforced concrete structure, the prefabricated structure joint water stop strip bag is arranged in the reserved groove (6) on two sides of the joint oppositely according to any one of claims 1 to 7, and a grouting pipe (4) of the water stop strip bag penetrates through the reinforced concrete structure on one side of the water stop strip bag and extends out of an adjacent empty side wall (8) of the reinforced concrete structure.
9. A method for compensating the contact stress of a prefabricated structure joint sealing strip bag structure, wherein grouting or inflation is performed in a large bag cavity (3) of the prefabricated structure joint sealing strip bag structure of the prefabricated structure joint sealing strip bag according to claim 8 by using a grouting pipe (4) if needed, and a grouting opening at the hollow end of the grouting pipe (4) is closed after the grouting or inflation is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110731164.1A CN113431608B (en) | 2021-06-30 | 2021-06-30 | Prefabricated assembly type structure joint water stop strip bag structure and contact stress compensation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110731164.1A CN113431608B (en) | 2021-06-30 | 2021-06-30 | Prefabricated assembly type structure joint water stop strip bag structure and contact stress compensation method |
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| Publication Number | Publication Date |
|---|---|
| CN113431608A CN113431608A (en) | 2021-09-24 |
| CN113431608B true CN113431608B (en) | 2021-11-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170135295A (en) * | 2016-05-31 | 2017-12-08 | 대룡공업주식회사 | Waterstops For Segment |
| CN107489435B (en) * | 2017-09-30 | 2023-08-18 | 济南市市政工程设计研究院（集团）有限责任公司 | Replaceable inflatable water stop for mine tunnel |
| CN110159318B (en) * | 2019-05-30 | 2020-10-23 | 东北大学 | Shield tunnel composite waterproof structure |
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