CN211898555U - Be applicable to small cross-section piping lane cast in situ concrete construction structure - Google Patents
Be applicable to small cross-section piping lane cast in situ concrete construction structure Download PDFInfo
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- CN211898555U CN211898555U CN202020432439.2U CN202020432439U CN211898555U CN 211898555 U CN211898555 U CN 211898555U CN 202020432439 U CN202020432439 U CN 202020432439U CN 211898555 U CN211898555 U CN 211898555U
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- Prior art keywords
- rubber
- protective layer
- cast
- section
- concrete construction
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- Expired - Fee Related
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 82
- 239000005060 rubber Substances 0.000 claims abstract description 82
- 239000011241 protective layer Substances 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 15
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 14
- 238000013461 design Methods 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000009415 formwork Methods 0.000 abstract description 4
- 230000007306 turnover Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model provides a be applicable to small cross section piping lane cast in situ concrete construction structure, place the rubber mandrel in the rainwater box culvert in including, the rubber mandrel includes inside gasbag and outside protective layer, and inside gasbag is by synthetic fiber fabric and fill the air in synthetic fiber fabric, and outside protective layer is including the design rubber that excels in that is located four bights of rainwater box culvert and the flexible rubber in the clearance of filling between design rubber that excels in and synthetic fiber fabric, still locates the design rubber that excels in and the flexible rubber outlying rubber bonding protective layer in clearance including being located the parcel. The utility model discloses utilize the rubber mandrel as the cast-in-place concrete structure template of piping lane, solved the difficult problem of little section concrete piping lane cross-section formwork difficulty, compare with conventional plank sheathing, have high turnover nature.
Description
Technical Field
The utility model belongs to the building construction field specifically belongs to a be applicable to small cross-section piping lane cast in situ concrete construction structure.
Background
At present, cities for building underground comprehensive pipe galleries are increasing at home, which is the most effective way for solving the problems of dense and disordered municipal pipelines, difficult maintenance and reduction of the enclosing cost. The concrete cross-sectional dimension that the piping lane need be confirmed according to current situation and planning according to local conditions when the design of piping lane, when the old urban area of city center is reformed transform and is upgraded and build utility tunnel, because of the restriction of underground space, the less cross-section of adoption will be inevitable to some piping lane cross-sections.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cast-in-place concrete construction structure suitable for a small-section pipe gallery, which solves the technical problem of difficult formwork erection in the construction of the small-section pipe gallery in the prior art; and the problem of low construction efficiency in the prior art is solved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a be applicable to small cross section piping lane cast in situ concrete construction structure which characterized in that: the rubber core mould comprises an inner air bag and an outer protective layer, wherein the inner air bag is composed of synthetic fiber fabrics and air filled in the synthetic fiber fabrics, the outer protective layer comprises high-strength setting rubber located at four corners of the rainwater box culvert and gap flexible rubber filled between the high-strength setting rubber and the synthetic fiber fabrics, and the rubber core mould further comprises a rubber bonding protective layer located on the periphery of the high-strength setting rubber and the gap flexible rubber in a wrapping mode.
Further preferably, the inner balloon and the outer protective layer are of a separable structure.
Furthermore, the cross section of the high-strength shaping rubber is right-angled, and the high-strength shaping rubber and the gap flexible rubber are surrounded and fixed to form a composite structure with a rectangular cross section periphery and a circular or elliptical middle space.
More preferably, a three-way valve is arranged on the rubber core mold.
Compared with the prior art the utility model has the following characteristics and beneficial effect:
the utility model discloses utilize the rubber mandrel as the cast-in-place concrete structure template of piping lane, solved the difficult problem of little section concrete piping lane cross-section formwork difficulty, compare with conventional plank sheathing, have high turnover nature, the turnover number of times reaches 60~80 times, and average input cost is lower, can accelerate construction speed by a wide margin, has characteristics such as safety, suitable for, has fine popularization and practical value, can produce good economic benefits after extensive popularization and application.
Drawings
Fig. 1 is the utility model relates to a structure schematic diagram suitable for small-section piping lane cast in situ concrete construction structure.
Detailed Description
In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention will be further described below.
The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
A cast-in-place concrete construction structure suitable for a small-section pipe gallery is shown in figure 1 and comprises a rubber core mold arranged in a rainwater box culvert 1, wherein the rubber core mold comprises an inner air bag 2 and an outer protective layer 3, the inner air bag 2 is composed of a synthetic fiber fabric 21 and air 22 filled in the synthetic fiber fabric 21, the outer protective layer 3 comprises high-strength shaped rubber 31 positioned at four corners of the rainwater box culvert 1 and gap flexible rubber 32 filled between the high-strength shaped rubber 31 and the synthetic fiber fabric 21, the rubber core mold further comprises a rubber bonding protective layer 33 wrapped on the peripheries of the high-strength shaped rubber 31 and the gap flexible rubber 32, the inner air bag 2 and the outer protective layer 3 are of a separable structure, the cross section of the high-strength shaped rubber 31 is in a right-angle shape, the periphery of the cross section is rectangular in a surrounding and fixed mode with the gap flexible rubber 32, the middle space is of a circular or elliptical composite structure, and the rubber cross-section, the rubber core mold is provided with a three-way valve, and the external protective layer 3 is coated with a release agent.
According to the sectional dimension of a concrete structure to be cast in situ and the thickness of the concrete slab, a high-strength rubber air bag matched with the sectional dimension of the concrete is manufactured, a protective layer is wrapped on the outer side of the air bag, gas with certain pressure is injected through an air compressor to form a template surface after the air bag is installed in place on site, the gas is discharged after the concrete reaches certain strength, and the core mold is removed.
The rubber core mold needs to be specially designed and produced in a factory before being used on site. The rubber core mold is divided into an inner layer and an outer layer and is processed by adopting a high polymer synthetic material. The inner layer is an air bag, a high-strength synthetic fiber fabric is used as a pressure-resistant stress component to bear the shaping and pressure-resistant functions, and a high-pressure air nozzle is arranged at the end part of the synthetic fiber fabric and used for air inflation and exhaust. The outer layer is a separated bonding protective layer, and vulcanized synthetic rubber is used as a bonding protective layer adhesive tape with an amorphous effect.
When the rubber core mold is customized, the material thickness, the material shape and the cross-sectional dimension of the inner layer air bag of the rubber core mold are selected according to the cross-sectional dimension in the cabin of the pipe gallery and the thickness of the top plate of the cast-in-place concrete; the design wall thickness and the air pressure of the rubber core mold are determined by calculating the pressure of the deformation allowable range of the core mold according to the mark number of concrete to be cast in situ, the thickness of the top plate and the span of the top plate; the length of the rubber core mold is based on the division of the on-site construction joint, but generally the length of the rubber core mold is not more than 30 meters to form a section. After production is finished, the gas is required to be inflated, loaded and pressure tested in a factory, and the gas can be pulled to the site after various requirements meet the use requirements.
The rubber core mold is pulled to the site and inflated according to the design pressure for 24 hours, and then the pressure is not reduced, so that the rubber core mold can be normally used.
Before the rubber mandrel is installed to the pipe gallery cabin, the side wall formwork of the pipe gallery cabin needs to be dismantled, and sundries such as side and bottom surface thin steel bars, concrete fragments, stones, wood chips and the like are completely cleaned up, so that sharp objects cannot be left. The rubber core mold is bundled, lifted and installed by using a rope or a cloth belt, and the protective layer is not scratched in the installation process.
After the rubber core mold is in place, the section of the core mold needs to be adjusted, the situation that the surface of the core mold deviates is avoided, the core mold needs to be roughly adjusted, then the core mold is inflated, the air pressure generally reaches 60% of the working pressure, so that the core mold air bag forms a certain basic shape, and the core mold is moved by a rope or a crowbar to be completely in place and accurate. And finally, inflating the rubber core mold again, wherein the air pressure reaches 90% of the working pressure, the rubber core mold and the wallboard are mutually extruded at the moment to play a fixing role, the rubber core mold cannot move freely, and the surface of the rubber core mold is opened and flattened.
When the rubber core mold is accurately in place and the surface is completely flat, all the surfaces in contact with concrete need to be uniformly coated with a release agent for at least three times, wherein the release agent is soap powder water (water: soap powder =20: 1).
The binding of the steel bars of the pipe gallery top plate is the same as that of the conventional construction method, but the following matters need to be noted:
the protective layer of the rubber core mold is required to be prevented from being punctured in the processes of carrying and binding the reinforcing steel bars, and the reinforcing steel bars cannot be directly stacked on the upper portion of the rubber core mold in an unforeseen manner, so that the rubber core mold is prevented from being damaged.
If the steel bars need to be welded, fire prevention and cooling measures need to be taken at the lower part of a welding area, welding slag is prevented from falling to the upper part of the rubber core mould, and meanwhile, the fire prevention measures need to be taken, so that the core mould is prevented from being damaged or dangerous due to high temperature.
The protective layer cushion block at the bottom of the steel bar needs to be properly increased relative to the common hard template, so that the problem that the thickness of a local protective layer is not enough is avoided.
And after the steel bars are bound and checked, the rubber core mold is inflated for the last time before concrete pouring is prepared, so that the air pressure of the rubber core mold reaches the working pressure.
1. And installing an air compressor on site, and connecting the air pipe with a three-way valve air tap of the rubber core mold air bag.
2. And opening the three-way valve to inflate, and controlling and monitoring the air pressure by using a pressure gauge.
3. When the front edge reaches the use pressure of the rubber air bag (the use pressure range is clear in design), the air inlet valve of the three-way valve is closed.
4. The gas is not over-pressurized. If the weather temperature is high, the pressure can be controlled at a lower value level of the usage pressure.
The method of placing concrete is substantially the same as for solid members, taking care to use high frequency insertion or simultaneous tamping with a tamping rod from both sides to prevent the displacement of the rubber core mould from side to side without the end of the tamping rod touching the rubber air bag core mould.
The air pressure value of the rubber air bag core mold needs to be monitored regularly and uninterruptedly in the pouring process and after pouring is finished, and if the pressure change is overlarge, the air bag core mold needs to be inflated or deflated in time so as to ensure that the air pressure is in the design range.
And when the concrete top plate reaches the form removal strength, the rubber core mold can be removed.
1. Opening the air bag valve of the rubber core mold to exhaust air;
2. injecting a certain amount of water into the cabin in the pipe gallery to form a certain amount of accumulated water in the cabin of the pipe gallery so as to reduce friction, and then tying the end part by using a rope belt to draw the end part out of the pipe gallery;
3. after the rubber core mold is demolded, immediately cleaning the surface of the rubber core mold with water by using a brush (a nylon brush) to keep the surface of a protective layer clean;
4. the rubber core mold is placed at a ventilated and dry place, so that the rubber core mold is prevented from being exposed to the sun at high temperature, oil solution, acid and alkali are not contacted, and fire is prevented.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The utility model provides a be applicable to small cross section piping lane cast in situ concrete construction structure which characterized in that: including placing the rubber mandrel in rainwater box culvert (1) in, the rubber mandrel includes inside gasbag (2) and outside protective layer (3), inside gasbag (2) by synthetic fiber fabric (21) and fill air (22) in synthetic fiber fabric (21), outside protective layer (3) are including the high strength design rubber (31) that are located rainwater box culvert (1) four bights and fill in high strength design rubber (31) and synthetic fiber fabric (21) between clearance flexible rubber (32), still including being located the parcel and locating high strength design rubber (31) and clearance flexible rubber (32) outlying rubber bonding protective layer (33).
2. The cast-in-place concrete construction structure suitable for the small-section pipe gallery according to claim 1, characterized in that: the inner air bag (2) and the outer protective layer (3) are of a separable structure.
3. The cast-in-place concrete construction structure suitable for the small-section pipe gallery according to claim 1, characterized in that: the cross section of the high-strength shaping rubber (31) is right-angled, and the high-strength shaping rubber and the gap flexible rubber (32) are enclosed and fixed to form a composite structure with a rectangular cross section periphery and a circular or elliptical middle space.
4. The cast-in-place concrete construction structure suitable for the small-section pipe gallery according to claim 1, characterized in that: and a three-way valve is arranged on the rubber core mold.
5. The cast-in-place concrete construction structure suitable for the small-section pipe gallery according to any one of claims 1 to 4, wherein: and a release agent is coated on the outer protective layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020432439.2U CN211898555U (en) | 2020-03-30 | 2020-03-30 | Be applicable to small cross-section piping lane cast in situ concrete construction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020432439.2U CN211898555U (en) | 2020-03-30 | 2020-03-30 | Be applicable to small cross-section piping lane cast in situ concrete construction structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211898555U true CN211898555U (en) | 2020-11-10 |
Family
ID=73274511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020432439.2U Expired - Fee Related CN211898555U (en) | 2020-03-30 | 2020-03-30 | Be applicable to small cross-section piping lane cast in situ concrete construction structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211898555U (en) |
-
2020
- 2020-03-30 CN CN202020432439.2U patent/CN211898555U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 |