CN108162154B - Steam curing-free maintenance method and production process for large tubular pile - Google Patents
Steam curing-free maintenance method and production process for large tubular pile Download PDFInfo
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- CN108162154B CN108162154B CN201711386704.7A CN201711386704A CN108162154B CN 108162154 B CN108162154 B CN 108162154B CN 201711386704 A CN201711386704 A CN 201711386704A CN 108162154 B CN108162154 B CN 108162154B
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- 238000012423 maintenance Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 10
- 238000001723 curing Methods 0.000 claims abstract description 56
- 239000004567 concrete Substances 0.000 claims abstract description 37
- 238000004321 preservation Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000007613 environmental effect Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 abstract description 4
- 230000003020 moisturizing effect Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a steam curing-free curing method for a large tubular pile, which aims at performing steam curing-free curing on a large tubular pile which is formed and not demoulded, does not include steam curing, and mainly comprises three stages: the first stage is centrifugation, vibration and before demoulding after rolling forming, and the maintenance of the first stage is heat preservation and maintenance in a maintenance pool; the second stage is that after demoulding, water culture is carried out in a water culture pond, and the stage is moisturizing and maintaining; the third stage is that the pipe joint is maintained after being discharged from the water maintaining pool, and the maintenance in the stage is natural maintenance; on the basis, the invention further discloses a steam curing-free production process of the large tubular pile based on the curing method. The steam-free health-preserving production process of the large tubular pile provided by the invention has the advantages that the link of steam curing in the pile manufacturing process of the large tubular pile is eliminated, the manufacturing difficulty of the large tubular pile is greatly reduced, the cost is reduced, the energy is saved, the performance of the prepared large tubular pile meets various standard requirements, the performance of the concrete of the large tubular pile is effectively improved, and the steam-free health-preserving production process of the large tubular pile has a very wide application prospect.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a large tubular pile maintenance and production technology.
Background
The production process of the large tubular pile comprises the production processes of reinforcing cage forming, steel mould assembling, pore-forming core pipe laying, pipe section concrete distributing, forming, steam curing, pipe section stripping, pipe drawing, natural curing, finished pipe section hoisting and the like. In the whole production process of the large tubular pile, in order to improve the early strength of the concrete of the large tubular pile, shorten the form removal time and improve the work efficiency, steam curing is adopted, water curing is carried out after the form removal, and the steam curing process consumes a lot of energy, so that the production link of the large tubular pile is increased, and the concrete performance of the large tubular pile is also influenced.
Under the requirement of advocating energy conservation and emission reduction in China, the owners and design units also put higher requirements on energy conservation, environmental protection and economy of the large tubular piles. Therefore, how to effectively reduce the energy consumption and the carbon emission in the production process of the large pipe pile on the basis of ensuring and improving the performance of the large pipe pile and the turnover efficiency of the template is a problem which needs to be solved in the field.
According to the invention, by developing the production process research of producing the large pipe pile without steam curing, on the basis of ensuring and improving the performance of the large pipe pile and the turnover efficiency of the template, through the raw material optimization and the ultra-early-strength concrete preparation technical research, and combining the hydration characteristics of the concrete material and the production and maintenance technical research and improvement of the large pipe pile, the effect of the environmental temperature on the development of the concrete strength is fully utilized, the steam curing is omitted for producing the large pipe pile, and the production process technology of the steam-curing-free large pipe pile is provided.
Disclosure of Invention
Aiming at the problems of the steam curing procedure adopted in the existing large tubular pile production process, a new large tubular pile production process capable of effectively saving energy consumption is needed.
Therefore, the invention aims to provide a curing method for the large tubular pile without steam curing, and further provides a production process for the large tubular pile without steam curing on the basis.
In order to solve the problems, the steam curing-free curing method for the large tubular pile provided by the invention comprises the following steps:
placing the formed large pipe pile without demoulding into a curing pool, and carrying out heat preservation curing;
demoulding the large pipe pile after heat preservation and maintenance;
carrying out moisture preservation and maintenance on the demolded large tubular pile in a water culture pond;
and placing the water-cured large tubular pile in the open air for natural curing.
Further, the heat preservation and maintenance are carried out in a closed maintenance pool.
Further, the curing time in the heat preservation curing is 12-36 h.
Further, the moisturizing and maintaining time is 1-5 days.
Further, the natural curing time is 1-10 days.
Further, the average environmental temperature of natural curing is not lower than 5 ℃.
In order to solve the problems, the steam curing-free production process for the large tubular pile provided by the invention is used for carrying out the steam curing-free treatment on the large tubular pile which is formed and is not demoulded.
Further, the production process comprises the steps of concrete raw material preparation, concrete stirring, steel reinforcement cage manufacturing, steel mould assembling, pore-forming core pipe laying, pipe section concrete distribution, three-composite forming, steam curing-free maintenance, pipe section splicing, tensioning and grouting.
The scheme provided by the invention systematically solves the related technical problems of the steam curing-free production process of the large tubular pile, greatly improves the performance of the large tubular pile, reduces the cost, thoroughly changes the high energy consumption history caused by curing in the production process of the large tubular pile, realizes the new breakthrough of the maintenance process of the large tubular pile, can be used for projects with higher durability requirements in marine environments, avoids the steam curing link in the pile manufacturing process of the steam curing-free large tubular pile, reduces the construction control difficulty, reduces the cost and saves energy, thereby being beneficial to environmental protection.
Moreover, the steam-curing-free large pipe pile formed based on the scheme provided by the invention has a very wide application prospect.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a flow chart of a steam curing-free production process of a large tubular pile in the embodiment of the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
According to the scheme, through the research on raw material optimization and ultra-early-strength concrete preparation technology, the self hydration characteristics of concrete materials and the research and improvement on the production and maintenance technology of the large tubular pile are combined, the effect of the environmental temperature on the development of the concrete strength is fully utilized, the existing steam maintenance production of the large tubular pile is abandoned, the production technology of the non-steam maintenance large tubular pile is innovatively proposed, the construction link is simplified, the energy consumption is reduced, the carbon emission is reduced, the cost is saved, and the energy consumption is reduced while the product quality and the yield of the large tubular pile are improved.
The production process of the non-autoclaved large pipe pile mainly comprises the steps of concrete raw material preparation, concrete stirring, reinforcement cage manufacturing, steel mould assembling, pore-forming core pipe laying, pipe section concrete distribution, three-composite forming, non-autoclaved curing, pipe section splicing, tensioning and grouting, and therefore the required large pipe pile is prepared and obtained.
The steam curing-free curing process in the scheme does not include steam curing and mainly comprises three stages:
the first stage is centrifugation, vibration and before demoulding after rolling forming, and the maintenance of the first stage is heat preservation and maintenance in a maintenance pool;
the second stage is that after demoulding, water culture is carried out in a water culture pond, and the stage is moisturizing and maintaining;
and the third stage is that the pipe joint is maintained after being discharged from the water maintaining pool, and the maintenance in the stage is natural maintenance.
In the scheme, the heat preservation maintenance is carried out in the closed maintenance pool, namely, the large pipe pile formed by centrifugation, vibration and rolling is put into the closed maintenance pool for heat preservation maintenance, and the proper maintenance time of the maintenance pool can be determined according to the change of the environmental temperature. In the scheme, the heat preservation and maintenance time of the maintenance pool is preferably 12-36 hours.
Under the heat preservation of the closed space of the closed maintenance pool and the hydration and heat release of the concrete cement of the tubular pile, the temperature in the maintenance pool is continuously increased, and the demolding strength of the concrete is improved.
In the second stage, the large pipe pile subjected to heat preservation and maintenance in the first stage is demoulded, and after demoulding, the large pipe pile is placed into a water culture pond for moisture preservation and maintenance. The preferable time for moisturizing and curing in the scheme is 1-5 days
According to the scheme, at the second stage, the water-cured large tubular pile is placed in the open air for natural curing, and the natural curing time is preferably 1-10 days. The curing time is different according to the change of the environmental temperature, when the temperature is lower, the natural curing time is relatively increased, and meanwhile, the average environmental temperature is not lower than 5 ℃.
Other procedures in the scheme can be realized by adopting corresponding procedures in the existing large tubular pile production process, for example, the preparation method of the concrete is realized by adopting the existing conventional technology. Therefore, on the basis of knowing the production process, the technical personnel in the technical field can adopt the conventional production preparation method to obtain the large tubular pile of the scheme.
The following specific embodiments are presented to further illustrate the invention, it being understood that the examples are not intended to limit the scope of the invention.
(1) EXAMPLES raw Material sources
Cement: strength grade 52.5 type ii portland cement.
Sand: the medium sand with fineness modulus of 2.7 contains 0.5% of mud and 0.2% of mud blocks.
Crushing stone: 5-20mm continuous graded broken stone (prepared by two stages of 5-10mm and 10-20 mm, the ratio of 5-10mm to 16-25mm is 3: 7), the mud content is 0.5%, and the mud block content is 0.1%.
Water reducing agent: GTS-413 early strength type polycarboxylic acid high performance water reducing agent of Shanghai high-iron chemical building materials Co.
Mixing water: city tap water is adopted.
(2) Concrete mixing proportion
TABLE 1 non-autoclaved concrete mix proportion (kg/m)3)
| Cement | Sand | Stone (stone) | Water (W) | Water reducing agent |
| 489 | 585 | 1244 | 125 | 5.38 |
(3) Manufacturing and maintaining large tubular pile
Referring to fig. 1, the steam-free production process of the large tubular pile in the present embodiment sequentially includes the following steps:
and (3-1) preparing concrete raw materials, wherein the concrete raw materials comprise a cementing material, aggregate, an additive and water conveying and stirring station, and the stirring station carries out electronic scale weighing.
(3-2) concrete mixing, wherein the concrete is mixed by a forced concrete mixer.
And (3-3) concrete workability detection and material distribution, wherein steel reinforcement cage manufacturing, steel mold manufacturing and assembling, coating of a film coating agent and steel reinforcement cage installation are carried out synchronously.
And (3-4) carrying out three composite forming processes of centrifugation, vibration and rolling to form the large tubular pile.
And (3-5) placing the formed large pipe pile without demoulding into a curing pool for heat preservation and curing.
And (3-6) demolding the large pipe pile subjected to heat preservation and maintenance, and after demolding, putting the large pipe pile into a water culture pond for moisture preservation and maintenance.
And (3-7) placing the water-cured large tubular piles into an open storage yard for natural curing.
And (3-8) splicing pipe joints of the large pipe pile subjected to natural maintenance.
(3-9) carrying out production processes of tensioning, grouting and the like on the large pipe pile spliced by the pipe sections.
And (3-10) finally, detecting the concrete of the pipe pile and leaving the factory.
(4) Test results
The test results of the curing pool temperature, the large tubular pile demoulding strength and the delivery strength at different environmental temperatures are shown in table 2. As can be seen from the table 2, by adopting the heat preservation and maintenance of the maintenance pool, the temperature in the maintenance pool is greatly increased, the early strength of the concrete is effectively improved, and the demolding strength of the concrete of the large tubular pile is greater than the standard 42MPa quality control requirement under the heat preservation effect of the maintenance pool within 12-36 hours. In addition, different natural curing is adopted according to different environmental temperatures, the strength of the concrete is continuously increased, and the strength of the concrete reaches the factory strength requirement of 70MPa and far exceeds the strength requirement of the concrete of the related specification requirement C60.
TABLE 2 concrete demold Strength and delivery Strength
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The steam curing-free maintenance method for the large tubular pile is characterized by sequentially comprising the following steps of:
placing the formed large pipe pile without demoulding into a closed curing pool, and carrying out heat preservation curing;
demoulding the large pipe pile after heat preservation and maintenance;
carrying out moisture preservation and maintenance on the demolded large tubular pile in a water culture pond;
and placing the water-cured large tubular pile in the open air for natural curing.
2. The steam curing-free curing method for the large tubular pile according to claim 1, wherein the heat-preserving curing is performed in a closed curing pool.
3. The steam curing-free curing method for the large tubular pile as claimed in claim 1, wherein the curing time in the heat-preservation curing is 12-36 h.
4. The steam curing-free curing method for the large tubular pile according to claim 1, wherein the moisture-retaining curing time is 1-5 days.
5. The steam curing-free curing method for the large tubular pile according to claim 1, wherein the natural curing time is 1-10 days.
6. A steam curing-free curing method for the large tubular pile as claimed in claim 1, wherein the average environmental temperature of natural curing is not lower than 5 ℃.
7. The steam curing-free production process of the large tubular pile is characterized in that the steam curing-free curing of any one of claims 1 to 6 is carried out on the formed and unmolded large tubular pile.
8. The steam curing-free production process of the large tubular pile according to claim 7, wherein the production process comprises concrete raw material preparation, concrete stirring, steel reinforcement cage manufacturing, steel mould assembly, pore-forming core tube arrangement, pipe section concrete distribution, three-composite forming, steam curing-free curing, pipe section splicing, tensioning and grouting.
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| CN201711386704.7A CN108162154B (en) | 2017-12-20 | 2017-12-20 | Steam curing-free maintenance method and production process for large tubular pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711386704.7A CN108162154B (en) | 2017-12-20 | 2017-12-20 | Steam curing-free maintenance method and production process for large tubular pile |
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| CN108162154A CN108162154A (en) | 2018-06-15 |
| CN108162154B true CN108162154B (en) | 2020-01-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432245A (en) * | 2011-08-29 | 2012-05-02 | 冯乃谦 | Method for making concrete for manufacturing pre-stress pipe piles |
| CN203818304U (en) * | 2014-05-16 | 2014-09-10 | 福建省尤溪长固制杆有限公司 | Heat-insulating and heat-preservation maintenance pool |
| CN106079059A (en) * | 2016-08-17 | 2016-11-09 | 上海建工材料工程有限公司 | A kind of PC component High Efficiency Thermal die station integrating dry and wet thermal curing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3844391B2 (en) * | 1997-12-19 | 2006-11-08 | 電気化学工業株式会社 | Method for producing mortar or concrete member |
| CN105541215B (en) * | 2015-12-08 | 2017-10-27 | 嘉华特种水泥股份有限公司 | One kind exempts from pressure and steams PHC pile tube binder materials |
| CN106003396B (en) * | 2016-05-30 | 2018-04-06 | 中交第三航务工程局有限公司 | The non-evaporating health production. art of PHC pile tubes and its application |
| CN106242437A (en) * | 2016-08-31 | 2016-12-21 | 连云港艾可新型建材有限公司 | A kind of prestressed high-strength concrete pile of non-evaporating pressure and preparation method thereof |
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- 2017-12-20 CN CN201711386704.7A patent/CN108162154B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432245A (en) * | 2011-08-29 | 2012-05-02 | 冯乃谦 | Method for making concrete for manufacturing pre-stress pipe piles |
| CN203818304U (en) * | 2014-05-16 | 2014-09-10 | 福建省尤溪长固制杆有限公司 | Heat-insulating and heat-preservation maintenance pool |
| CN106079059A (en) * | 2016-08-17 | 2016-11-09 | 上海建工材料工程有限公司 | A kind of PC component High Efficiency Thermal die station integrating dry and wet thermal curing |
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