CN113463923A - Safe building construction method under low-temperature condition in winter - Google Patents
Safe building construction method under low-temperature condition in winter Download PDFInfo
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- CN113463923A CN113463923A CN202110813453.6A CN202110813453A CN113463923A CN 113463923 A CN113463923 A CN 113463923A CN 202110813453 A CN202110813453 A CN 202110813453A CN 113463923 A CN113463923 A CN 113463923A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a safe building construction method under a low-temperature condition in winter, which comprises the following steps: s1, bundling the reinforcing mesh, and horizontally paving a layer of electric heating wire mesh in the reinforcing mesh; s2, pouring concrete, wherein the pouring temperature of the concrete is 5-10 ℃; s3, tamping the concrete, wherein a heating element is adopted to heat the concrete in the tamping process; s4, curing the concrete, namely erecting a steam pipe above the tamped concrete, paving a layer of plastic film outside the steam pipe, and paving a heat-insulating material outside the plastic film; s5, opening the electric heating wire mesh to heat the interior of the concrete, opening the steam pipe to heat and maintain the upper part of the concrete, and opening a heating device fixedly arranged below the formwork for pouring the concrete to heat and maintain the lower part of the concrete. By adopting the safe building construction method under the winter low-temperature condition, the invention can solve the problems of low concrete solidification rate and easy crack generation caused by lower winter temperature.
Description
Technical Field
The invention relates to the technical field of construction methods, in particular to a safe building construction method under a low-temperature condition in winter.
Background
Most of the existing buildings are reinforced concrete structures, and the building structure poured by reinforced concrete has higher strength, strong bearing capacity, good stability, convenient construction and high construction efficiency, so that the building structure of reinforced concrete is widely applied to various building projects. The solidification of the reinforced concrete mainly depends on the hydration reaction of the concrete, and the hydration reaction rate is increased by about 70 percent when the temperature is increased by 10 ℃, so that the temperature plays an important role in the hydration reaction of the concrete. Under the low-temperature condition in winter, the environmental temperature is lower, heat is released in the concrete hydration process, the temperature in the concrete is raised, and the environmental temperature is lower, so that the concrete hydration process is slower, and the solidification rate of the concrete is low; the temperature difference between the inside and the outside of the concrete is large, so that cracks are easily generated in the concrete and on the surface of the concrete, and the strength of the poured concrete is influenced.
Disclosure of Invention
The invention aims to provide a safe building construction method under the condition of low temperature in winter, which solves the problems of low concrete solidification rate and easy crack generation caused by low temperature in winter.
In order to achieve the aim, the invention provides a safe building construction method under the low-temperature condition in winter, which comprises the following steps:
s1, bundling the reinforcing steel bar mesh, bundling reinforcing steel bars on a template of a floor slab of a building to obtain the reinforcing steel bar mesh, horizontally paving a layer of electric heating wire mesh in the reinforcing steel bar mesh, and connecting the electric heating wire mesh with an external power supply;
s2, pouring concrete, namely pouring the concrete by using a concrete pump truck, pouring the concrete into the template, burying the reinforcing mesh and the electric heating wire in the concrete, wherein the pouring temperature of the concrete is 5-10 ℃;
s3, tamping the concrete, wherein the concrete is heated by a heating element in the tamping process of the concrete, and the concrete is tamped while being heated;
s4, curing the concrete, namely erecting a steam pipe above the tamped concrete, paving a layer of plastic film outside the steam pipe, and paving a heat-insulating material outside the plastic film;
s5, opening an electric heating wire mesh arranged inside the steel bar to heat the inside of the concrete, opening a steam pipe to heat and maintain the upper part of the concrete, and opening a heating device fixedly arranged below a template for pouring the concrete to heat and maintain the lower part of the concrete.
Preferably, in step S2, a heating element having a heating effect on the concrete is disposed in the conveying pipeline of the concrete pump truck, and the concrete is heated to 5-10 ℃.
Preferably, in step S3, the heating element is a heating rod, the heating rod is fixed on the concrete vibrator, and the heating rod is connected to an external power supply.
Preferably, in step S4, the heat insulation material is pearl wool or a cotton pad.
Preferably, in step S5, a heating device is disposed in the building space below the formwork, and a cotton curtain is used to block the window of the building space.
According to the safe building construction method under the low-temperature condition in winter, the electric heating wire mesh is arranged inside the reinforcing mesh and heats the interior of concrete, so that the hydration rate of the interior of the concrete is improved. The steam pipe is arranged above the concrete, and the steam in the steam pipe is adopted to heat and humidify the concrete, so that the temperature and hydration rate above the concrete are improved, and the generation of cracks on the surface of the concrete can be avoided. The lower part of the concrete is heated by a heating device arranged below the template, so that the temperature below the concrete is improved. All set up heating device in top, below and the middle part of concrete, be favorable to improving the homogeneity of the temperature and the humidity of concrete, improve the homogeneity of concrete hydration, reduce or avoid the production of crack, improve the intensity of concrete. Set up heating device in the space of the below of concrete placement's floor, improve the temperature of environment, reduce the influence of ambient temperature to the concrete to carry out further maintenance to concrete wallboard etc. of below.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the safe construction method under the low temperature condition in winter according to the present invention.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Examples
A safe building construction method under winter low-temperature conditions comprises the following steps:
and S1, bundling the reinforcing steel bar mesh, bundling the reinforcing steel bars on a template of a floor slab of a building to obtain the reinforcing steel bar mesh, horizontally paving a layer of electric heating wire mesh in the reinforcing steel bar mesh, and connecting the electric heating wire mesh with an external power supply. The electric heating silk screen heats the inside of concrete, improves the inside temperature of concrete, is favorable to going on of the inside hydration reaction of concrete.
S2, pouring concrete, namely pouring the concrete by using a concrete pump truck, pouring the concrete into the template, and embedding the reinforcing mesh and the electric heating wire in the concrete, wherein the pouring temperature of the concrete is 5-10 ℃.
When concrete is stirred, the stirrer needs to be subjected to cold-proof treatment, the framework is subjected to heating treatment before being added, the temperature of the framework during adding is 5-10 ℃, the framework and warm water with the temperature of more than 50 ℃ are firstly added into the stirrer for stirring, cement and an antifreezing agent are added into the mixture for stirring uniformly, and the stirring temperature is not lower than 10 ℃. During the concrete transportation process, heat preservation needs to be carried out, and the temperature is not lower than 5 ℃. When concrete is poured, a heating element with a heating effect on the concrete is arranged in a conveying pipeline of the concrete pump truck, and the temperature of the concrete is heated to 5-10 ℃. The heating element may be a heating rod, a heating plate or a heating wire.
And S3, tamping the concrete, wherein the concrete is heated by adopting a heating element in the tamping process of the concrete, and the concrete is tamped while being heated. The heating element is a heating rod, the heating rod is fixed on the concrete vibrating rod, and the heating rod is connected with an external power supply. The heating rod is adopted to heat and tamp the concrete, so that the influence of icing of moisture in the concrete due to too low temperature on the fluidity of the concrete and the compactness of hard concrete is avoided.
And S4, curing the concrete, namely erecting steam pipes above the tamped concrete, wherein the steam pipes are in a grid shape. According to the area of the concrete, a plurality of steam pipes can be arranged above the concrete, and steam holes formed in the steam pipes face the direction of the concrete. The steam pipe is connected with an external steam generating device. The steam in the steam pipe improves the temperature and the humidity of the concrete, is beneficial to the hydration of the concrete and avoids the surface of the concrete from generating cracks. And a layer of plastic film is laid outside the steam pipe, and a heat insulation material is laid outside the plastic film. The heat insulating material is pearl cotton or cotton pad. The plastic film reduces the loss of moisture, the heat insulation material reduces the loss of heat, and the effect of steam on heating and humidifying concrete is improved.
S5, opening an electric heating wire mesh arranged inside the steel bar to heat the inside of the concrete, and opening a steam pipe to heat and maintain the upper part of the concrete. And opening a heating device fixedly arranged below the template for pouring the concrete to heat and maintain the lower part of the concrete. The heating device can be an electric heating plate or an electric heating rod, the heating device heats the template, and the heat heats the lower part of the concrete through the template, so that the hydration rate of the concrete is improved, and the solidification uniformity of the concrete is improved.
Be provided with heating device in the building space of template below, heating device can be current electric heater unit, and electric heater unit heats the building space of template below to building further maintenance to the lower floor is careful, and is favorable to reducing the difference in temperature between environment and the concrete. And the cotton curtain is adopted to block the window of the lower building space, so that the heat loss is reduced.
Therefore, the safe construction method under the winter low-temperature condition can solve the problems that the solidification rate of concrete is low and cracks are easy to generate due to the fact that the temperature in winter is low.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (5)
1. A safe building construction method under the condition of low temperature in winter is characterized by comprising the following steps:
s1, bundling the reinforcing steel bar mesh, bundling reinforcing steel bars on a template of a floor slab of a building to obtain the reinforcing steel bar mesh, horizontally paving a layer of electric heating wire mesh in the reinforcing steel bar mesh, and connecting the electric heating wire mesh with an external power supply;
s2, pouring concrete, namely pouring the concrete by using a concrete pump truck, pouring the concrete into the template, burying the reinforcing mesh and the electric heating wire in the concrete, wherein the pouring temperature of the concrete is 5-10 ℃;
s3, tamping the concrete, wherein the concrete is heated by a heating element in the tamping process of the concrete, and the concrete is tamped while being heated;
s4, curing the concrete, namely erecting a steam pipe above the tamped concrete, paving a layer of plastic film outside the steam pipe, and paving a heat-insulating material outside the plastic film;
s5, opening an electric heating wire mesh arranged inside the steel bar to heat the inside of the concrete, opening a steam pipe to heat and maintain the upper part of the concrete, and opening a heating device fixedly arranged below a template for pouring the concrete to heat and maintain the lower part of the concrete.
2. The safe building construction method under the low temperature condition in winter as claimed in claim 1, wherein: in the step S2, a heating element having a heating effect on the concrete is arranged in the conveying pipeline of the concrete pump truck, and the temperature of the concrete is heated to 5-10 ℃.
3. The safe building construction method under the low temperature condition in winter as claimed in claim 1, wherein: in the step S3, the heating element is a heating rod, the heating rod is fixed on the concrete vibrating rod, and the heating rod is connected with an external power supply.
4. The safe building construction method under the low temperature condition in winter as claimed in claim 1, wherein: in the step S4, the heat insulating material is pearl wool or a cotton pad.
5. The safe building construction method under the low temperature condition in winter as claimed in claim 1, wherein: in the step S5, a heating device is provided in the building space below the template, and a cotton curtain is used to block the window of the building space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813453.6A CN113463923A (en) | 2021-07-19 | 2021-07-19 | Safe building construction method under low-temperature condition in winter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813453.6A CN113463923A (en) | 2021-07-19 | 2021-07-19 | Safe building construction method under low-temperature condition in winter |
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| CN113463923A true CN113463923A (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110813453.6A Pending CN113463923A (en) | 2021-07-19 | 2021-07-19 | Safe building construction method under low-temperature condition in winter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704095A (en) * | 2022-04-15 | 2022-07-05 | 濮阳市宏超建筑安装有限公司 | Continuous casting equipment and method for reinforcement cage concrete pipe in building |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008007938A (en) * | 2006-06-27 | 2008-01-17 | Akemasa Kurotani | Foundation construction method |
| CN104453240A (en) * | 2014-08-28 | 2015-03-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Temperature control method in concrete vibrating process and vibrating rod with heating function |
| CN106239711A (en) * | 2016-08-26 | 2016-12-21 | 中交第二航务工程局有限公司 | A kind of cast-in-situ concrete member maintenance process in winter |
| CN108527629A (en) * | 2018-05-02 | 2018-09-14 | 芜湖恒固混凝土材料有限公司 | A kind of heating curing device for concrete |
| CN110282924A (en) * | 2019-06-24 | 2019-09-27 | 河南国基建设集团有限公司 | A kind of concrete construction method for winter construction |
-
2021
- 2021-07-19 CN CN202110813453.6A patent/CN113463923A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008007938A (en) * | 2006-06-27 | 2008-01-17 | Akemasa Kurotani | Foundation construction method |
| CN104453240A (en) * | 2014-08-28 | 2015-03-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Temperature control method in concrete vibrating process and vibrating rod with heating function |
| CN106239711A (en) * | 2016-08-26 | 2016-12-21 | 中交第二航务工程局有限公司 | A kind of cast-in-situ concrete member maintenance process in winter |
| CN108527629A (en) * | 2018-05-02 | 2018-09-14 | 芜湖恒固混凝土材料有限公司 | A kind of heating curing device for concrete |
| CN110282924A (en) * | 2019-06-24 | 2019-09-27 | 河南国基建设集团有限公司 | A kind of concrete construction method for winter construction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704095A (en) * | 2022-04-15 | 2022-07-05 | 濮阳市宏超建筑安装有限公司 | Continuous casting equipment and method for reinforcement cage concrete pipe in building |
| CN114704095B (en) * | 2022-04-15 | 2023-04-07 | 濮阳市宏超建筑安装有限公司 | Continuous casting equipment and method for reinforcement cage concrete pipe in building |
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Application publication date: 20211001 |
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